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JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream limit method example. Java 8 Stream forEach method example. Java 8 Stream toArray method example. Java 8 Stream reduce method example. Java 8 Stream collect method example. Java 8 Stream concat method example. Java 8 Stream anyMatch (), allMatch () and noneMatch () example. Java 8 Stream findFirst (), findAny () example. JAVA API FOR JSON PROCESSING JSR 353 addresses the standard Java API for JSON processing and shipped as part of JEE 7. JEE provides 2 different types of API for JSON processing. 1) Object Model API. 2) Streaming API. In this article we have given examples on javax.json package to play with Jsondata.
SPRING JDBC EXAMPLE WITH JDBCDAOSUPPORT Spring JDBC example with JdbcDaoSupport. Previous example Spring JDBC example with JdbcTemplate shows how to use JdbcTemplate to make JDBC calls. You can make your JDBC calls even more simple by extending JdbcDaoSupport. If your DAO class extends JdbcDaoSupport, then you dont need to use JdbcTemplate in your code, here is the example forJdbcDaoSupport:
JAVA STRINGTOKENIZER WITH MULTIPLE DELIMITERS SAMPLE CODE Below example shows how to break a string based on multiple delimiters. Each character in the constructors delimiter field acts as one delimiter. ? StringTokenizer st = new StringTokenizer(msg,"://.");
SPRING BEAN POST PROCESSORS Spring AOP Advices - After throwing advice example - xml based configuration. Spring AOP Advices - Around advice example - xml based configuration. Spring AOP Advice - Pointcuts – Name match example. Spring AOP Advice - Pointcuts – Regular expression example. SpringAOP - AspectJ -
WHAT IS @SPRINGBOOTAPPLICATION ANNOTATION IN SPRING BOOT The following are the parameters accepted in the @SpringBootApplication annotation: exclude: Exclude the list of classes from the auto configuration.. excludeNames: Exclude the list of fully qualified class names from the auto configuration.This parameter added since spring boot 1.3.0. IMPLEMENT BINARY SEARCH TREE (BST) PRE ORDER TRAVERSAL Here is an example picture of binary search tree (BST) for our example code: Here is the steps to implement pre-order traversal: Start with root node. Check if the current node is empty / null. Display the data part of the root (or current node). Traverse the left subtree by HOW TO CREATE A TREESET WITH COMPARATOR? Description: To implement your own sorting functionality with TreeSet, you have to pass Comparator object along with TreeSet constructor call. The Comparator implementation holds the sorting logic. You have to override compare () method to provide the sorting logic. Below example shows how to sort TreeSet using comparator. DATABASE FAILOVER AND HIGH AVAILABILITY IN JBOSS 7 If we are configuring our application for high availability and disaster recover, it is mandatory to have failover configurations at DB datasource level as well. In this page, we described how to configure database failover in JBoss 7. Close watch below JBoss datasource configurations. The "connection-url" tag contains two connection urls with JAVA SAMPLE PROGRAMS Java is an object-oriented, cross platform, multi-purpose programming language produced by Sun Microsystems, later acquired by Oracle Corporation. One thing that distinguished Java from some other languages is its ability to run the same compiled code across multiple operating systems. In other languages, the source code (code that iswritten
JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream limit method example. Java 8 Stream forEach method example. Java 8 Stream toArray method example. Java 8 Stream reduce method example. Java 8 Stream collect method example. Java 8 Stream concat method example. Java 8 Stream anyMatch (), allMatch () and noneMatch () example. Java 8 Stream findFirst (), findAny () example. JAVA API FOR JSON PROCESSING JSR 353 addresses the standard Java API for JSON processing and shipped as part of JEE 7. JEE provides 2 different types of API for JSON processing. 1) Object Model API. 2) Streaming API. In this article we have given examples on javax.json package to play with Jsondata.
SPRING JDBC EXAMPLE WITH JDBCDAOSUPPORT Spring JDBC example with JdbcDaoSupport. Previous example Spring JDBC example with JdbcTemplate shows how to use JdbcTemplate to make JDBC calls. You can make your JDBC calls even more simple by extending JdbcDaoSupport. If your DAO class extends JdbcDaoSupport, then you dont need to use JdbcTemplate in your code, here is the example forJdbcDaoSupport:
JAVA STRINGTOKENIZER WITH MULTIPLE DELIMITERS SAMPLE CODE Below example shows how to break a string based on multiple delimiters. Each character in the constructors delimiter field acts as one delimiter. ? StringTokenizer st = new StringTokenizer(msg,"://.");
SPRING BEAN POST PROCESSORS Spring AOP Advices - After throwing advice example - xml based configuration. Spring AOP Advices - Around advice example - xml based configuration. Spring AOP Advice - Pointcuts – Name match example. Spring AOP Advice - Pointcuts – Regular expression example. SpringAOP - AspectJ -
WHAT IS @SPRINGBOOTAPPLICATION ANNOTATION IN SPRING BOOT The following are the parameters accepted in the @SpringBootApplication annotation: exclude: Exclude the list of classes from the auto configuration.. excludeNames: Exclude the list of fully qualified class names from the auto configuration.This parameter added since spring boot 1.3.0. IMPLEMENT BINARY SEARCH TREE (BST) PRE ORDER TRAVERSAL Here is an example picture of binary search tree (BST) for our example code: Here is the steps to implement pre-order traversal: Start with root node. Check if the current node is empty / null. Display the data part of the root (or current node). Traverse the left subtree by HOW TO CREATE A TREESET WITH COMPARATOR? Description: To implement your own sorting functionality with TreeSet, you have to pass Comparator object along with TreeSet constructor call. The Comparator implementation holds the sorting logic. You have to override compare () method to provide the sorting logic. Below example shows how to sort TreeSet using comparator. DATABASE FAILOVER AND HIGH AVAILABILITY IN JBOSS 7 If we are configuring our application for high availability and disaster recover, it is mandatory to have failover configurations at DB datasource level as well. In this page, we described how to configure database failover in JBoss 7. Close watch below JBoss datasource configurations. The "connection-url" tag contains two connection urls with HOW TO CONFIGURE LOGBACK (SLF4J) LOGGING TO SPRING BOOT Spring boot also allows you to create standard logback.xml file in the resources directory. This will override the Spring Boot logging template. All you need to do is, specify your logback configuration file in application.properties as shown below: application.properties.? 1.
RESTFUL WEBSERVICES WITH HTTP BASIC AUTHENTICATION The Authorization header is constructed as follows: 1) Username and password are combined into a string "username:password". 2) The resulting string is then encoded using Base64 encoding. 3) The authorization method and a space i.e. "Basic " is then put before the encoded string. For example, if the user agent uses 'Aladdin' as theusername and
JAVA STRINGTOKENIZER WITH MULTIPLE DELIMITERS SAMPLE CODE Transient variables cannot be serialized. During serialization process, transient variable states will not be serialized. State of the value will be always defaulted after deserialization. ASSERTION METHOD ASSERT.ASSERTEQUALS() EXAMPLE. Program: Assertion method Assert.assertEquals() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. HOW TO LOAD EXTERNAL PROPERTY FILES INTO SPRING BOOT By default, Spring Boot look for externalized default property file application.properties into given below predetermined locations: -- In the classpath root. -- In the package "/config" in classpath. -- In the current directory. -- In the "/config" directory of currentfolder. Now
EXAMPLE FOR SINGLETON CLASS USING STATIC BLOCK. Below example shows how to create singleton classes using static block. To create singleton class, make constructor as private, so that you cannot create object outside of the class. Create a private static variable of same class type, so that created object will be pointed tothis reference.
LIST OF ALL JAVA LINKEDHASHMAP SAMPLE EXAMPLES Java LinkedHashMap Examples. LinkedHashMap is a combination of Hash table and linked list implementation of the Map interface, with predictable iteration order. It maintains a doubly-linked list running through all of its entries. The iteration order is normally the order in which keys were inserted into the map ie insertion order. HOW TO READ HEADER PARAMETERS IN JAX-RS RESTFUL WEB ServletOutputStream: ServletResponse.getOutputStream() returns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data, it sends the raw data as it is. PrintWriter: ServletResponse.getWriter() returns PrintWriter object which sends character text to the client. The PrintWriter uses the character encoding returned by HOW TO DELETE A NODE FROM BINARY SEARCH TREE (BST)? Here is the steps to delete a node from binary search tree: Case 1: Node to be deleted has is a leaf node (no children). This is very simple implementation. First find the node reference with given value. Set corresponding link of the parent node to null. With this the node to be deleted lost its connectivity and eligible for garbagecollection
HOW TO REMOVE GIT REPOSITORY GLOBAL IDENTITY? In the previous post, we have seen how to configure user name and email address as a global identity to our all git repositories using "git config --global" command. Use below commands to remove those user global identities. This will reset your git global identity. ? JAVA SAMPLE PROGRAMS Java is an object-oriented, cross platform, multi-purpose programming language produced by Sun Microsystems, later acquired by Oracle Corporation. One thing that distinguished Java from some other languages is its ability to run the same compiled code across multiple operating systems. In other languages, the source code (code that iswritten
JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream limit method example. Java 8 Stream forEach method example. Java 8 Stream toArray method example. Java 8 Stream reduce method example. Java 8 Stream collect method example. Java 8 Stream concat method example. Java 8 Stream anyMatch (), allMatch () and noneMatch () example. Java 8 Stream findFirst (), findAny () example. RESTFUL WEBSERVICES WITH HTTP BASIC AUTHENTICATION The Authorization header is constructed as follows: 1) Username and password are combined into a string "username:password". 2) The resulting string is then encoded using Base64 encoding. 3) The authorization method and a space i.e. "Basic " is then put before the encoded string. For example, if the user agent uses 'Aladdin' as theusername and
ASSERTION METHOD ASSERT.ASSERTEQUALS() EXAMPLE. Program: Assertion method Assert.assertEquals() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. JAVA STRINGTOKENIZER WITH MULTIPLE DELIMITERS SAMPLE CODE Transient variables cannot be serialized. During serialization process, transient variable states will not be serialized. State of the value will be always defaulted after deserialization. WHAT IS @SPRINGBOOTAPPLICATION ANNOTATION IN SPRING BOOT The following are the parameters accepted in the @SpringBootApplication annotation: exclude: Exclude the list of classes from the auto configuration.. excludeNames: Exclude the list of fully qualified class names from the auto configuration.This parameter added since spring boot 1.3.0. ASSERTION METHOD ASSERT.ASSERTTRUE() EXAMPLE. Program: Assertion method Assert.assertTrue () example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. Assert.assertTrue () methods checks whether the expected value is true or not. ? IMPLEMENT BINARY SEARCH TREE (BST) PRE ORDER TRAVERSAL Here is an example picture of binary search tree (BST) for our example code: Here is the steps to implement pre-order traversal: Start with root node. Check if the current node is empty / null. Display the data part of the root (or current node). Traverse the left subtree by HOW TO READ HEADER PARAMETERS IN JAX-RS RESTFUL WEB ServletOutputStream: ServletResponse.getOutputStream() returns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data, it sends the raw data as it is. PrintWriter: ServletResponse.getWriter() returns PrintWriter object which sends character text to the client. The PrintWriter uses the character encoding returned by HOW TO LOAD EXTERNAL PROPERTY FILES INTO SPRING BOOT By default, Spring Boot look for externalized default property file application.properties into given below predetermined locations: -- In the classpath root. -- In the package "/config" in classpath. -- In the current directory. -- In the "/config" directory of currentfolder. Now
JAVA SAMPLE PROGRAMS Java is an object-oriented, cross platform, multi-purpose programming language produced by Sun Microsystems, later acquired by Oracle Corporation. One thing that distinguished Java from some other languages is its ability to run the same compiled code across multiple operating systems. In other languages, the source code (code that iswritten
JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream limit method example. Java 8 Stream forEach method example. Java 8 Stream toArray method example. Java 8 Stream reduce method example. Java 8 Stream collect method example. Java 8 Stream concat method example. Java 8 Stream anyMatch (), allMatch () and noneMatch () example. Java 8 Stream findFirst (), findAny () example. RESTFUL WEBSERVICES WITH HTTP BASIC AUTHENTICATION The Authorization header is constructed as follows: 1) Username and password are combined into a string "username:password". 2) The resulting string is then encoded using Base64 encoding. 3) The authorization method and a space i.e. "Basic " is then put before the encoded string. For example, if the user agent uses 'Aladdin' as theusername and
ASSERTION METHOD ASSERT.ASSERTEQUALS() EXAMPLE. Program: Assertion method Assert.assertEquals() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. JAVA STRINGTOKENIZER WITH MULTIPLE DELIMITERS SAMPLE CODE Transient variables cannot be serialized. During serialization process, transient variable states will not be serialized. State of the value will be always defaulted after deserialization. WHAT IS @SPRINGBOOTAPPLICATION ANNOTATION IN SPRING BOOT The following are the parameters accepted in the @SpringBootApplication annotation: exclude: Exclude the list of classes from the auto configuration.. excludeNames: Exclude the list of fully qualified class names from the auto configuration.This parameter added since spring boot 1.3.0. ASSERTION METHOD ASSERT.ASSERTTRUE() EXAMPLE. Program: Assertion method Assert.assertTrue () example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. Assert.assertTrue () methods checks whether the expected value is true or not. ? IMPLEMENT BINARY SEARCH TREE (BST) PRE ORDER TRAVERSAL Here is an example picture of binary search tree (BST) for our example code: Here is the steps to implement pre-order traversal: Start with root node. Check if the current node is empty / null. Display the data part of the root (or current node). Traverse the left subtree by HOW TO READ HEADER PARAMETERS IN JAX-RS RESTFUL WEB ServletOutputStream: ServletResponse.getOutputStream() returns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data, it sends the raw data as it is. PrintWriter: ServletResponse.getWriter() returns PrintWriter object which sends character text to the client. The PrintWriter uses the character encoding returned by HOW TO LOAD EXTERNAL PROPERTY FILES INTO SPRING BOOT By default, Spring Boot look for externalized default property file application.properties into given below predetermined locations: -- In the classpath root. -- In the package "/config" in classpath. -- In the current directory. -- In the "/config" directory of currentfolder. Now
LIST OF ALL JAVA INTERVIEW ALGORITHMS Find out middle index where sum of both ends are equal. Write a singleton class. Write a program to create deadlock between two threads. Write a program to reverse a string using recursive algorithm. Write a program to reverse a number. Write a program to convert decimal number to binary format. ASSERTION METHOD ASSERT.ASSERTEQUALS() EXAMPLE. Program: Assertion method Assert.assertEquals() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. ASSERTION METHOD ASSERT.ASSERTTRUE() EXAMPLE. Program: Assertion method Assert.assertTrue () example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. Assert.assertTrue () methods checks whether the expected value is true or not. ? HOW TO SORT AN ARRAY USING COMPARATOR? Description: Java Arrays class provides few utility methods. One of the utility method Arrays.sort () helps us to sort an Array of objects by passing Comparator object, where Comparator holds the sorting logic. Below example shows how to sort an array using Comparator.Code:
HOW TO STORE AND READ OBJECTS FROM A FILE? Description: Sometimes we need to store the objects to the file system, and need to read them whenever required. Below example shows how to store the objects to the file, and how to retrieve them from the file. ObjectInputStream and ObjectOutputStream classes can help us to store and read objects from a file IMPLEMENT BINARY SEARCH TREE (BST) IN-ORDER TRAVERSAL Here is the steps to implement in-order traversal: Start with root node. Check if the current node is empty / null. Traverse the left subtree by recursively calling the in-order function. Display the data part of the root (or current node). Traverse the right subtree by recursively calling the in-order function. YouTube. HACKERRANK STACK PROBLEM Program: HackerRank stack problem - Find maximum element. You have an empty sequence, and you will be given N queries. Each query is one of these three types: 1 x -Push the element x into the stack. 2 -Delete the element present at the top of the stack. 3 -Print the maximum element in the stack. The first line of input contains an integer, N. EXAMPLE FOR SINGLETON CLASS USING STATIC BLOCK. Below example shows how to create singleton classes using static block. To create singleton class, make constructor as private, so that you cannot create object outside of the class. Create a private static variable of same class type, so that created object will be pointed tothis reference.
HOW TO SET GIT UPSTREAM REMOTE? How to set git upstream remote? Git upstream generally refers to the original repo that you have forked from other git repositories. When a repo is cloned, it has a default remote called origin that points to your fork on GitHub, not the original repo it was forked from. HOW TO REMOVE GIT REPOSITORY GLOBAL IDENTITY? In the previous post, we have seen how to configure user name and email address as a global identity to our all git repositories using "git config --global" command. Use below commands to remove those user global identities. This will reset your git global identity. ? JAVA SAMPLE PROGRAMS The heart of the Java platform is the concept of a "virtual machine" that executes Java bytecode programs. This bytecode is the same no matter what hardware or LIST OF ALL JDBC EXAMPLES Preemptive scheduling: The highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Time slicing: A task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on priority and otherfactors.
JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream.filter() example. Stream.filter() method returns a stream consisting of the elements of this stream that match the givenpredicate.
WHAT IS @SPRINGBOOTAPPLICATION ANNOTATION IN SPRING BOOT The following are the parameters accepted in the @SpringBootApplication annotation: exclude: Exclude the list of classes from the auto configuration.. excludeNames: Exclude the list of fully qualified class names from the auto configuration.This parameter added since spring boot 1.3.0. ASSERTION METHOD ASSERT.ASSERTTRUE() EXAMPLE. Program: Assertion method Assert.assertTrue() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. HACKERRANK STACK PROBLEM List Of All Interview Programs: Remove last node of the Linked List; Identify middle element of a Linked List; Identify given LinkedList is a palindrom or not using Stack. HOW TO READ HEADER PARAMETERS IN JAX-RS RESTFUL WEB ServletOutputStream: ServletResponse.getOutputStream() returns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data, it sends the raw data as it is. PrintWriter: ServletResponse.getWriter() returns PrintWriter object which sends character text to the client. The PrintWriter uses the character encoding returned by HOW TO LOAD EXTERNAL PROPERTY FILES INTO SPRING BOOT How to load external property files into Spring Boot application? It is a standard practice that during our production deployments, our application loads property files from external locations. WHAT IS SESSIONFACTORY IN HIBERNATE? What is SessionFactory in Hibernate? SessionFactory is an interface. SessionFactory can be created by providing Configuration object, which will contain all DB related property details pulled from either hibernate.cfg.xml file or hibernate.properties file. HOW TO SET GIT UPSTREAM REMOTE? How to set git upstream remote? Git upstream generally refers to the original repo that you have forked from other git repositories. When a repo is cloned, it has a default remote called origin that points to your fork on GitHub, not the original repo it was forked from. JAVA SAMPLE PROGRAMS The heart of the Java platform is the concept of a "virtual machine" that executes Java bytecode programs. This bytecode is the same no matter what hardware or LIST OF ALL JDBC EXAMPLES Preemptive scheduling: The highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Time slicing: A task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on priority and otherfactors.
JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream.filter() example. Stream.filter() method returns a stream consisting of the elements of this stream that match the givenpredicate.
WHAT IS @SPRINGBOOTAPPLICATION ANNOTATION IN SPRING BOOT The following are the parameters accepted in the @SpringBootApplication annotation: exclude: Exclude the list of classes from the auto configuration.. excludeNames: Exclude the list of fully qualified class names from the auto configuration.This parameter added since spring boot 1.3.0. ASSERTION METHOD ASSERT.ASSERTTRUE() EXAMPLE. Program: Assertion method Assert.assertTrue() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. HACKERRANK STACK PROBLEM List Of All Interview Programs: Remove last node of the Linked List; Identify middle element of a Linked List; Identify given LinkedList is a palindrom or not using Stack. HOW TO READ HEADER PARAMETERS IN JAX-RS RESTFUL WEB ServletOutputStream: ServletResponse.getOutputStream() returns a ServletOutputStream suitable for writing binary data in the response. The servlet container does not encode the binary data, it sends the raw data as it is. PrintWriter: ServletResponse.getWriter() returns PrintWriter object which sends character text to the client. The PrintWriter uses the character encoding returned by HOW TO LOAD EXTERNAL PROPERTY FILES INTO SPRING BOOT How to load external property files into Spring Boot application? It is a standard practice that during our production deployments, our application loads property files from external locations. WHAT IS SESSIONFACTORY IN HIBERNATE? What is SessionFactory in Hibernate? SessionFactory is an interface. SessionFactory can be created by providing Configuration object, which will contain all DB related property details pulled from either hibernate.cfg.xml file or hibernate.properties file. HOW TO SET GIT UPSTREAM REMOTE? How to set git upstream remote? Git upstream generally refers to the original repo that you have forked from other git repositories. When a repo is cloned, it has a default remote called origin that points to your fork on GitHub, not the original repo it was forked from. LIST OF ALL JDBC EXAMPLES Preemptive scheduling: The highest priority task executes until it enters the waiting or dead states or a higher priority task comes into existence. Time slicing: A task executes for a predefined slice of time and then reenters the pool of ready tasks. The scheduler then determines which task should execute next, based on priority and otherfactors.
JAVA SPRING-BOOT TUTORIAL Spring-Boot Tutorial with Examples. Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications thatyou can "just run".
ASSERTION METHOD ASSERT.ASSERTEQUALS() EXAMPLE. Program: Assertion method Assert.assertEquals() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. LIST OF ALL JAVA ARRAYLIST SAMPLE EXAMPLES Description: ArrayList is a resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. SAVE 60% OFF W/ RENOVATOR STORE COUPONS & PROMO CODES Get 60% Off discounts by using Renovator Store discount codes and sales for this June. Obtain huge savings with 10 active Renovator Store coupons today. 70% OFF ALWAYS RIDING PROMO CODES Save 70% Off from today's best Always Riding promo codes and sales. Never miss a chance to obtain 7 live Always Riding promotions for instant discounts and free shipping. JAX-RS @QUERYPARAM AND @DEFAULTVALUE ANNOTATIONS EXAMPLE JAX-RS @QueryParam and @DefaultValue annotations example. This page gives you an example using JAX-RS @QueryParam and @DefaultValue annotations, which injects value from request parameters to your method input parameters. 80% OFF PHARMEASY COUPONS → JUNE DISCOUNT CODE Get 80% Off discounts by using PharmEasy coupon codes and offers for this June. Grab big savings from 30 live PharmEasy coupons today. PARAGON STAIRS PROMO CODE: JUNE 2021 COUPONS Enjoy discounts by using Paragon Stairs discount codes and deals for this June. Seize big savings from 9 tested Paragon Stairs couponstoday.
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JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream limit method example. Java 8 Stream forEach method example. Java 8 Stream toArray method example. Java 8 Stream reduce method example. Java 8 Stream collect method example. Java 8 Stream concat method example. Java 8 Stream anyMatch (), allMatch () and noneMatch () example. Java 8 Stream findFirst (), findAny () example. SPRING AOP - ASPECTJ - @AFTERTHROWING EXAMPLE - SPRING AspectJ comes with below annotations: 1) @Before. 2) @After. 3) @AfterReturning. 4) @AfterThrowing. 5) @Around. In this page we will see an example for @AfterThrowing annotation. @AfterThrowing annotation intercepts method after throwing any exception. pom.xml file gives all required dependencies: Add dependencies for spring-aopjar, aspectjrt
ASSERTION METHOD ASSERT.ASSERTTRUE() EXAMPLE. Program: Assertion method Assert.assertTrue () example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. Assert.assertTrue () methods checks whether the expected value is true or not. ? HACKERRANK STACK PROBLEM All three stacks now have height = 5. Thus, we print 5 as our answer. 1) Keep track of stack heights indivitually. 2) Keep track of smallest stack height. 3) Continue removing from stacks until we reach the height of the smallest stack. 4) We can adjust the height of stack only by deletion to reach the smallest. HOW TO QUERY SINGLE COLUMN USING SPRING JDBCTEMPLATE How to query single column using spring JdbcTemplate? In the previous example you have seen Spring JDBC query example using JdbcDaoSupport In this page you will see how to query single column using JdbcTemplate.. pom.xml file gives all required dependencies: HOW TO LOAD EXTERNAL PROPERTY FILES INTO SPRING BOOT By default, Spring Boot look for externalized default property file application.properties into given below predetermined locations: -- In the classpath root. -- In the package "/config" in classpath. -- In the current directory. -- In the "/config" directory of currentfolder. Now
WHAT IS SESSIONFACTORY IN HIBERNATE? SessionFactory is an interface. SessionFactory can be created by providing Configuration object, which will contain all DB related property details pulled from either hibernate.cfg.xml file or hibernate.properties file. SessionFactory is a factory for Session objects. We can create one SessionFactory implementation per databasein any application.
HOW TO READ HEADER PARAMETERS IN JAX-RS RESTFUL WEB How to read header parameters in JAX-RS restful web services? In this page you can see an example to query http header info using @Context annotation and HttpHeaders. HOW TO SET GIT UPSTREAM REMOTE? How to set git upstream remote? Git upstream generally refers to the original repo that you have forked from other git repositories. When a repo is cloned, it has a default remote called origin that points to your fork on GitHub, not the original repo it was forked from. JAVA SAMPLE PROGRAMS Java is an object-oriented, cross platform, multi-purpose programming language produced by Sun Microsystems, later acquired by Oracle Corporation. One thing that distinguished Java from some other languages is its ability to run the same compiled code across multiple operating systems. In other languages, the source code (code that iswritten
JAVA 8 STREAM.FILTER() EXAMPLE. Java 8 Stream limit method example. Java 8 Stream forEach method example. Java 8 Stream toArray method example. Java 8 Stream reduce method example. Java 8 Stream collect method example. Java 8 Stream concat method example. Java 8 Stream anyMatch (), allMatch () and noneMatch () example. Java 8 Stream findFirst (), findAny () example. SPRING AOP - ASPECTJ - @AFTERTHROWING EXAMPLE - SPRING AspectJ comes with below annotations: 1) @Before. 2) @After. 3) @AfterReturning. 4) @AfterThrowing. 5) @Around. In this page we will see an example for @AfterThrowing annotation. @AfterThrowing annotation intercepts method after throwing any exception. pom.xml file gives all required dependencies: Add dependencies for spring-aopjar, aspectjrt
ASSERTION METHOD ASSERT.ASSERTTRUE() EXAMPLE. Program: Assertion method Assert.assertTrue () example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. Assert.assertTrue () methods checks whether the expected value is true or not. ? HACKERRANK STACK PROBLEM All three stacks now have height = 5. Thus, we print 5 as our answer. 1) Keep track of stack heights indivitually. 2) Keep track of smallest stack height. 3) Continue removing from stacks until we reach the height of the smallest stack. 4) We can adjust the height of stack only by deletion to reach the smallest. HOW TO QUERY SINGLE COLUMN USING SPRING JDBCTEMPLATE How to query single column using spring JdbcTemplate? In the previous example you have seen Spring JDBC query example using JdbcDaoSupport In this page you will see how to query single column using JdbcTemplate.. pom.xml file gives all required dependencies: HOW TO LOAD EXTERNAL PROPERTY FILES INTO SPRING BOOT By default, Spring Boot look for externalized default property file application.properties into given below predetermined locations: -- In the classpath root. -- In the package "/config" in classpath. -- In the current directory. -- In the "/config" directory of currentfolder. Now
WHAT IS SESSIONFACTORY IN HIBERNATE? SessionFactory is an interface. SessionFactory can be created by providing Configuration object, which will contain all DB related property details pulled from either hibernate.cfg.xml file or hibernate.properties file. SessionFactory is a factory for Session objects. We can create one SessionFactory implementation per databasein any application.
HOW TO READ HEADER PARAMETERS IN JAX-RS RESTFUL WEB How to read header parameters in JAX-RS restful web services? In this page you can see an example to query http header info using @Context annotation and HttpHeaders. HOW TO SET GIT UPSTREAM REMOTE? How to set git upstream remote? Git upstream generally refers to the original repo that you have forked from other git repositories. When a repo is cloned, it has a default remote called origin that points to your fork on GitHub, not the original repo it was forked from. JAVA SAMPLE PROGRAMS Java is an object-oriented, cross platform, multi-purpose programming language produced by Sun Microsystems, later acquired by Oracle Corporation. One thing that distinguished Java from some other languages is its ability to run the same compiled code across multiple operating systems. In other languages, the source code (code that iswritten
WHAT IS @SPRINGBOOTAPPLICATION ANNOTATION IN SPRING BOOT The following are the parameters accepted in the @SpringBootApplication annotation: exclude: Exclude the list of classes from the auto configuration.. excludeNames: Exclude the list of fully qualified class names from the auto configuration.This parameter added since spring boot 1.3.0. ASSERTION METHOD ASSERT.ASSERTEQUALS() EXAMPLE. Program: Assertion method Assert.assertEquals() example. Java Class: org.junit.Assert. Assert class provides a set of assertion methods useful for writing tests. LIST OF ALL JAVA ARRAYLIST SAMPLE EXAMPLES Java ArrayList Examples. Description: ArrayList is a resizable-array implementation of the List interface. Implements all optional list operations, and permits all elements, including null. In addition to implementing the List interface, this class provides methods to manipulate the size of the array that is used internally to store thelist.
HACKERRANK STACK PROBLEM Program: HackerRank stack problem - Find maximum element. You have an empty sequence, and you will be given N queries. Each query is one of these three types: 1 x -Push the element x into the stack. 2 -Delete the element present at the top of the stack. 3 -Print the maximum element in the stack. The first line of input contains an integer, N. JAX-RS @QUERYPARAM AND @DEFAULTVALUE ANNOTATIONS EXAMPLE This page gives you an example using JAX-RS @QueryParam and @DefaultValue annotations, which injects value from request parameters to your method input parameters. In the previous examples we have given details of application setup, dependencies, web.xml file configurations: If you want to know about these configuration, pleaserefer these:
HOW TO DELETE A NODE FROM BINARY SEARCH TREE (BST)? Here is the steps to delete a node from binary search tree: Case 1: Node to be deleted has is a leaf node (no children). This is very simple implementation. First find the node reference with given value. Set corresponding link of the parent node to null. With this the node to be deleted lost its connectivity and eligible for garbagecollection
IS THE SPRING SINGLETON BEAN THREAD SAFE? Answer: Spring framework does not do anything under the hood concerning the multi-threaded behavior of a singleton bean. It is the developer’s responsibility to deal with concurrency issue and thread safety of the singleton bean. While practically, most spring beanshave
READ MULTIPLE VALUES OF A QUERY PARAMTER IN JAX-RS RESTFUL How to read multiple values of a query paramter in JAX-RS restful web services? In the previous example we have seen how to read query paramters from the request using @QueryParam annotation. HOW TO LOAD EXTERNAL PROPERTY FILE IN JBOSS 7 CLASSPATH How to load external property file in JBoss 7 classpath? This page talks about how to bring application specific or external property file (any kind of file) into JBoss AS 7.x in the applicationclasspath.
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Introduction
Java is an object-oriented, cross platform, multi-purpose programming language produced by Sun Microsystems, later acquired by Oracle Corporation. One thing that distinguished Java from some other languages is its ability to run the same compiled code across multiple operating systems. In other languages, the source code (code that is written by the programmer), is compiled by a compiler into an executable file. This file is in machine language, and is intended for a single operating system/processor combination, so the programmer would have to re-compile the program seperately for each new operating system/processor combination. Java is different in that it does not compile the code directly into machine language code. Compilation creates bytecode out of the source code. The heart of the Java platform is the concept of a "virtual machine" that executes Java bytecode programs. This bytecode is the same no matter what hardware or operating system the program is running under. There is a JIT (Just In Time) compiler within the Java Virtual Machine, or JVM. The JIT compiler translates the Java bytecode into native processor instructions at run-time and caches the native code in memory during execution. Although Java programs are cross-platform or platform independent, the code of the Java Virtual Machines (JVM) that execute these programs is not. Every supported operating platform has its own JVM. Core Spring Examples The Spring Framework provides a comprehensive programming and configuration model for modern Java-based enterprise applications - on any kind of deployment platform. A key element of Spring is infrastructural support at the application level: Spring focuses on the "plumbing" of...more...
Restful Web Service Examples RESTful web services are built to work best on the Web. Representational State Transfer (REST) is an architectural style that specifies constraints, such as the uniform interface, that if applied to a web service induce desirable properties, such as performance, scalability, and modifiability...more...
Collections & Util Package A collections framework is a unified architecture for representing and manipulating collections. Java Collections Framework reduces programming effort, increases program speed and quality, allows interoperability among unrelated APIs, fosters software reuse.more...
Data Structures
A data structure is a particular way of storing and organizing data in a computer so that it can be used efficiently. Data structures provide a means to manage large amounts of data efficiently. efficient data structures are a key to designing efficient algorithms.more...
Java Interview Programs We have collected list of java interview programs from few software engineers and also with my personal experience. In this section, we are trying to give you the best solutions for these problems. Good interviewers are more interested in your ability to code.more...
Java Sorting Algorithms A sorting algorithm is an algorithm that puts elements of a list in a certain order. The most-used orders are numerical order and lexicographical order. Efficient sorting is important for optimizing the use of other algorithms such as search and merge...more...
Java JDBC Examples
JDBC stands for Java Database Connectivity. JDBC API is a collection of classes and interfaces, which help a Java application to connect to SQL based relational databases by abstracting vendor specific details of the database. JDBC enables Java developers to connect to...more...
Java Annotations Examples Java Annotations are also called Metadata. Annotations are introduced with JDK 5 onwards. Annotations allows us to add some form of metadata information into our source code, but it doesnot change the execution flow of the program. These annotations...more...
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doPost Vs doGet methods doGet() method is used to get information, while doPost() method is used for posting information. doGet() requests can't send large amount of information and is limited to 240-255 characters. However, doPost()requests passes all of its data, of unlimited length. A doGet() request is appended to the request URL in a query string and this allows the exchange is visible to the client, whereas a doPost() request passes directly over the socket connection as part of its HTTP request body and the exchange are invisible to the client.Famous Quotations
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ABOUT AUTHOR
I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my devenvironment.
If you come across any mistakes or bugs, please email me to java2novice@gmail.com.MOST VISITED PAGES
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