7、线程异常

捕获子线程异常的解决方案
1、手动在子线程的run方法里面try catch
2、利用UncaughtExceptionhandler

    public void uncaughtException(Thread t, Throwable e) {
        if (parent != null) {
            parent.uncaughtException(t, e);
        } else {
            Thread.UncaughtExceptionHandler ueh =
                Thread.getDefaultUncaughtExceptionHandler();
            if (ueh != null) {
                ueh.uncaughtException(t, e);
            } else if (!(e instanceof ThreadDeath)) {
                System.err.print("Exception in thread \""
                                 + t.getName() + "\" ");
                e.printStackTrace(System.err);
            }
        }

package com.imooc.thread_demo.uncaughtexception;
/**
 * @Author: zhangjx
 * @Date: 2020/9/12 23:15
 * @Description:
 */
public class MyUncaughtExceptionHandler implements Thread.UncaughtExceptionHandler{
    private String name;
    public MyUncaughtExceptionHandler(String name) {
        this.name = name;
    }
    @Override
    public void uncaughtException(Thread t, Throwable e) {
        System.out.println(name + "捕获" + t.getName() + " 线程异常，中止！");
    }
}

package com.imooc.thread_demo.uncaughtexception;
/**
 * @Author: zhangjx
 * @Date: 2020/9/12 23:19
 * @Description:
 */
public class UseMyUncaughtExceptionHandler {
    public static void main(String[] args) {
        Thread.setDefaultUncaughtExceptionHandler(new MyUncaughtExceptionHandler("自定义捕获器1"));
        new Thread(new SubThread()).start();
    }
    static class SubThread implements Runnable{
        @Override
        public void run() {
            throw  new RuntimeException("子线程运行异常！");
        }
    }
}