Top Most How to close Java program or Swing Application with Example

In order to close Java program we need to consider which kind of Java application it is?, because termination of Java application varies between normal core java program to swing GUI application. In general all Java program terminates automatically once all user threads created by program finishes its execution, including main thread. JVM doesn't wait for daemon thread so as soon as last user thread finished, Java program will terminate. If you want to close or terminate your java application before this your only option is to use System.exit(int status) or Runtime.getRuntime().exit(). This cause JVM to abandon all threads and exit immediately. Shutdown hooks are get called to allow some last minute clearing before JVM actually terminates. System.exit() also accept an int status parameter where a non zero value denote abnormal execute and its the result returned by java command to caller. In this java tutorial we will see example of closing both Java program and Java Swing application. This is also a good swing interview questions which you can ask to any GUI developer and my second article in swing after writing invokeAndWait vs invokeLater

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