java多线程异常捕获

java多线程中出现了异常，如何捕获。利用UncaughtExceptionHandler这个接口就可以了。

代码如下:

package com.ming.thread.six.threadcreateException;

public class MyThread extends Thread{

    public void run(){
        String uname=null;
        System.out.println(uname.hashCode());
    }
}

package com.ming.thread.six.threadcreateException;

import java.lang.Thread.UncaughtExceptionHandler;

public class Run {
    public static void main(String[] args) {
        MyThread t=new MyThread();
        t.setName("mythread");
        t.setUncaughtExceptionHandler(new UncaughtExceptionHandler() {//这个就是异常处理的实现,一旦出现异常就执行里面的方法哦
            @Override
            public void uncaughtException(Thread t, Throwable e) {
                System.out.println("c出现了线程异常哦");
                
            }
        });
        t.start();
        
    }
}

下面这个例子是在一个线程组中实现异常捕捉:

package com.ming.thread.six.threadgroupException;

public class MyThreadGroup extends ThreadGroup {

    public MyThreadGroup(String name){
        super(name);
    }

    @Override
    public void uncaughtException(Thread t, Throwable e) {
        super.uncaughtException(t, e);
        this.interrupt();//打断
    }
    
}

package com.ming.thread.six.threadgroupException;

public class MyThread extends Thread{

    private String num;
    
    public MyThread(ThreadGroup group,String name,String num){
        super(group,name);
        this.num=num;
    }
    
    public void run(){
        int numInt=Integer.parseInt(num);
        while(this.isInterrupted()==false){
            System.out.println("死循环中:"+Thread.currentThread().getName());
        }
    }
}

package com.ming.thread.six.threadgroupException;

public class Test {

    public static void main(String[] args) {
        MyThreadGroup group=new MyThreadGroup("我的线程组哦");
        MyThread [] myThreads=new MyThread[10];
        for(int i=0;i<myThreads.length;i++){
            myThreads[i]=new MyThread(group,"线程"+(i+1),"1");//正常线程
            myThreads[i].start();
        }
        MyThread newThread=new MyThread(group,"报错线程","sa");
        newThread.start();
    }
}

so，I forget it。。。