public class NoCaughtThread  implements Runnable{@Overridepublic void run() {System.out.println(3 / 2);System.out.println(3 / 0);System.out.println(3 / 1);}public static void main(String[] args) {try {Thread thread = new Thread(new NoCaughtThread());thread.start();} catch (Exception e) {System.out.println("==Exception: " + e.getMessage());}}
}

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;public class InitiativeCaught {public static void main(String[] args) {InitialtiveThread initialtiveThread = new InitialtiveThread() ;ExecutorService exec = Executors.newCachedThreadPool();exec.execute(initialtiveThread);exec.shutdown();}
}class InitialtiveThread implements Runnable {@Overridepublic void run() {Throwable thrown = null;try {System.out.println(3 / 2);System.out.println(3 / 0);System.out.println(3 / 1);} catch (Throwable e) {thrown = e;} finally {threadDeal(this, thrown);}}public void threadDeal(Runnable r, Throwable t) {System.out.println("==Exception: " + t.getMessage());}
}

import java.lang.Thread.UncaughtExceptionHandler;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;public class ThreadMonitor implements Runnable {private int data;                    // 可设置通过构造传参private int control = 0;private static final int MAX = 3;    // 设置重试次数public ThreadMonitor(int i) {this.data = i;    }public ThreadMonitor() {// TODO Auto-generated constructor stub
    }@Overridepublic void run() {Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler() {@Overridepublic void uncaughtException(Thread arg0, Throwable e) {// TODO Auto-generated method stubSystem.out.println("==Exception: " + e.getMessage());String message = e.getMessage();if( control==MAX ){return ;}else if( "ok".equals(message) ){return ;}else if ( "error".equals(message) ) {new Thread() {public void run() {try {System.out.println("开始睡眠。");Thread.sleep(1 * 1000);control++ ;System.out.println("睡眠结束，control: "+ control);myTask(data) ;} catch (InterruptedException e) {e.printStackTrace();}};}.start();}else{return ;}}});  myTask(data) ;}@SuppressWarnings("finally")public void myTask(int data){boolean flag = true ;try {System.out.println(4 / data);} catch (Exception e) {flag = false ;} finally {if( flag ){throw new RuntimeException("ok");}else{throw new RuntimeException("error");}}}public static void main(String[] args) {ExecutorService exec = Executors.newCachedThreadPool();ThreadMonitor threadMonitor = new ThreadMonitor(0);exec.execute(threadMonitor);exec.shutdown();}
}