Java如何在没有try-catch的情况下显示异常

Question

Java can show exceptions in the terminal although the error prone codes between try-catch block is not enclosed. How does Java do that?

Answer 1

There is a global exception handling in JVM layer.

EDIT.

You can implement global exception handling using Thread.setDefaultUncaughtExceptionHandler()

Answer 2

According to the Java API documentation, when a thread is going to terminate due to an uncaught exception, the Java Virtual Machine will query the thread for its UncaughtExceptionHandler

As our program has main Thread JVM ask main about Exception Handler by Thread.getUncaughtExceptionHandler() .

Than invokes handler by passing Thread and Exception as an argument to handle Exception