The easiest way to garner user input in a Java program is to use the System’s Console class. Introduced in Java 6, Java’s System Console class provides two simple methods to obtain user input: The ...

Every time you do so, Firefox inherits a new version of the Java Console (a debugging tool that’s useless to the vast majority of users). Unfortunately, the old ones don’t get deleted.

JDK 5.0 and JDK 6.0 include the Java Monitoring & Management Console tool, also known as JConsole. Read about JConsole's usage options, and find out how JConsole changed from JDK 5 to JDK 6.