URL: https://www.progressiverobot.com/java-repl-jshell/ Java REPL or jshell is the new tool introduced in [java 9](/community/tutorials/java-9-features-with-examples). Today we will look into Java REPL basics and run some test programs in jshell interface. Java REPL Let's first try to understand why REPL support was added in Java, if it was that important then why in so late release. […]
URL: https://www.progressiverobot.com/java-string-interview-questions-and-answers/ Introduction String is one of the most widely used Java classes. This article provides some practice questions and answers about String to help you prepare for an interview. You can also try the [Java String Quiz](/community/tutorials/java-string-quiz) to test your knowledge of the String class. What is the String class in Java? Is String […]
Java Collection classes are fail-fast which means that if the Collection will be changed while some thread is traversing over it using iterator, the iterator.next() will throw ConcurrentModificationException. This situation can come in case of multithreaded as well as single threaded environment.
URL: https://www.progressiverobot.com/json-simple-example/ json-simple is a simple java toolkit for JSON. json-simple library is fully compliance with JSON specification (RFC4627). json-simple  json-simple uses [Map](/community/tutorials/java-map) and [List](/community/tutorials/java-list) internally for JSON processing. We can use json-simple for parsing JSON data as well as writing JSON to file. One of the best feature […]
URL: https://www.progressiverobot.com/logger-in-java-logging-example/ Today we will look into Logger in Java. Java Logger provides logging in java programming. Logger in Java  Java Logging API was introduced in 1.4 and you can use java logging API to log application messages. In this java logging tutorial, we will learn basic features of […]
Learn everything about multithreading in Java, including core concepts, practical examples, common pitfalls, and when to use multithreading for optimal performance.
Bam! Ruby in your HTML markup. Here’s how to do it.
URL: https://www.progressiverobot.com/servlet-jsp-tutorial/ Servlet JSP technologies are backbone of Java EE programming. Recently I have written a lot about Servlet and JSP programming and this is a summary post for Servlet JSP Tutorials where I am providing all the article links in the order to read them. Servlet JSP Tutorial ![Servlet JSP Tutorial, JSP Tutorial, JSP […]
URL: https://www.progressiverobot.com/string-char-array-java/ Sometimes we have to convert String to the character array in java programs or convert a string to char from specific index. String to char Java  String class has three methods related to char. Let's look at them before we look at a java program […]
URL: https://www.progressiverobot.com/tomcat-datasource-jndi-example-java/ Welcome to Tomcat DataSource JNDI Example Tutorial. We looked at the [JDBC DataSource](/community/tutorials/java-datasource-jdbc-datasource-example "JDBC DataSource Example – Oracle, MySQL and Apache DBCP Tutorial") in the last tutorial and learned how to use that in standalone java application. Tomcat DataSource JNDI  Actual benefit of DataSource comes […]
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