How do you log an uncaught exception in Java?

Question

My client is testing my beta phase Java application on a data that he cannot provide me with (privacy reasons). Although I implemented the handling of most exceptions, application crashes on rare occasions.

Can I log the stacktrace of an uncaught exception to a file so that tester can provide me with it(eg NullPointerException )?

Answer 1

设置一个Thread.UncaughtExceptionHandler打印到指定的文件。

Answer 2

If the main thread crashes, the JVM will print a stacktrace automatically.

For other threads, you can use setUncaughtExceptionHandler .

Answer 3

This is exactly the thing what UncaughtExceptionHandler concept is about .

Basically you are able to register a piece of code to be executed when the exception reaches the top of the stack.