57 lines
1.6 KiB
Java
57 lines
1.6 KiB
Java
// lowlevel/CaptureUncaughtException.java
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// (c)2020 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import java.util.concurrent.*;
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class ExceptionThread2 implements Runnable {
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@Override
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public void run() {
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Thread t = Thread.currentThread();
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System.out.println("run() by " + t.getName());
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System.out.println(
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"eh = " + t.getUncaughtExceptionHandler());
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throw new RuntimeException();
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}
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}
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class MyUncaughtExceptionHandler implements
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Thread.UncaughtExceptionHandler {
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@Override
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public void uncaughtException(Thread t, Throwable e) {
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System.out.println("caught " + e);
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}
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}
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class HandlerThreadFactory implements ThreadFactory {
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@Override
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public Thread newThread(Runnable r) {
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System.out.println(this + " creating new Thread");
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Thread t = new Thread(r);
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System.out.println("created " + t);
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t.setUncaughtExceptionHandler(
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new MyUncaughtExceptionHandler());
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System.out.println(
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"eh = " + t.getUncaughtExceptionHandler());
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return t;
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}
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}
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public class CaptureUncaughtException {
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public static void main(String[] args) {
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ExecutorService exec =
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Executors.newCachedThreadPool(
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new HandlerThreadFactory());
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exec.execute(new ExceptionThread2());
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exec.shutdown();
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}
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}
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/* Output:
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HandlerThreadFactory@4e25154f creating new Thread
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created Thread[Thread-0,5,main]
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eh = MyUncaughtExceptionHandler@70dea4e
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run() by Thread-0
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eh = MyUncaughtExceptionHandler@70dea4e
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caught java.lang.RuntimeException
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*/
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