示例：

import java.util.concurrent.ExecutorService;import java.util.concurrent.Executors;import java.util.concurrent.ThreadFactory;/** * Created by Administrator on 2017/9/6. *///任务class ExceptionThread2 implements Runnable {    @Override    public void run() {        Thread t = Thread.currentThread();        System.out.println("run() by" + t);        System.out.println(                "eh = " + t.getUncaughtExceptionHandler()        );        throw new RuntimeException();    }}//异常处理class MyUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler {    @Override    public void uncaughtException(Thread t, Throwable e) {        System.out.print("caught" + e);    }}//以线程方式启动任务class HandlerThreadFactor implements ThreadFactory {    public Thread newThread(Runnable r) {        System.out.println(this + " creating new Thread");        Thread t = new Thread(r);        System.out.println("created " + t);        t.setUncaughtExceptionHandler(new MyUncaughtExceptionHandler());        System.out.println(                "eh = " + t.getUncaughtExceptionHandler()        );        return t;    }}public class CaptureUncaughtException {    public static void main(String[] args){        ExecutorService exec = Executors.newCachedThreadPool(new HandlerThreadFactor());        exec.execute(new ExceptionThread2());    }}

输出结果：

由于线程的本质特性，使得你不能捕获从线程中逃逸的异常。一旦异常逃出任务的run()方法之外，它就会向外传播到控制台，除非你采取特殊的步骤捕获这些错误的异常。可以用Executor来解决这个问题。

Thread.UncaughtException-Handler是Java SE中的新接口，它允许你在每个Thread对象上都附着一个异常处理器，Thread.UncaughtExceptionHandler.uncaughtException()会在线程因未捕获的异常而临近死亡时被调用，为了使用它，创新了一个新类型的ThreadFactory,它将在每个新创建的Thread对象上附着一个Thread.UncaughtExceptionHandler。将这个工厂传递给Executors创建新的ExecutorService的方法。