java中的异常链

1.自定义新的异常

public class DrunkException extends Exception {
    public DrunkException(String message){
        super(message);
    }
    public DrunkException(){}
}

2.测试异常链

public class ChainTest {
    /**
     * Test1():抛出“喝大了”异常
     * Test2():调用Test1(),捕获“喝大了”异常，并且包装成运行时异常，继续抛出
     * main()方法中，调用test2()，尝试捕获test2()方法抛出的异常
     * */
    public static void main(String[] args) {
        ChainTest ct=new ChainTest();
        try {
            ct.Test2();
        }catch (Exception e){
            e.printStackTrace();
        }
    }
    public void Test1()throws DrunkException{
        throw new DrunkException("喝酒别开车");
    }
    public void Test2(){
        try {
            Test1();
        }catch (DrunkException e){
            RuntimeException newExc=new RuntimeException("司机一滴酒，情人两行泪");
            newExc.initCause(e);
            throw newExc;
        }
    }
}

3.运行结果

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