public class UncaughtExceptionHandlerTest { static volatile boolean b = false; public static void main(String[] args) throws Throwable { Thread t = new Thread(new Runnable() { @Override public void run() { // Harder for checked exceptions because `run` does not throw any exception: TODO // http://stackoverflow.com/questions/1369204/how-to-throw-a-checked-exception-from-a-java-thread throw new RuntimeException(); } }); // Once you set this, the stack trace won't // show anymore from the main thread. t.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() { @Override public void uncaughtException(Thread th, Throwable ex) { b = true; // This still happens in the thread that threw, // so the exception won't blow up outside. //throw new RuntimeException(ex); } }); t.start(); t.join(); assert b; } }