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package com.test; import java.io.FileReader; public class Test2 { public static void main(String[] args) throws Exception { Father father = new Father(); father.test1(); father.test2(); } } class Father{ private Son son = null; public Father() { this.son = new Son(); } public void test1() { System.out.println("1"); //要调son的test2必须要捕获或者抛出一层层往上抛,最终抛给虚拟机 try { son.test2(); } catch (Exception e) { // TODO: handle exception System.out.println("把一个异常交给上一层调用者去处理"); System.out.println("父亲在处理"); e.printStackTrace(); } } //或者都不管一层层向上 throws,一层层向上抛,跑到main函数最终抛给JVM虚拟机 public void test2() throws Exception { System.out.println("1"); //要调son的test2必须要捕获或者抛出一层层往上抛,最终抛给虚拟机 son.test2(); } } class Son{ public void test2() throws Exception { FileReader fr = null; fr = new FileReader("D:\\aa.txt"); } }
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原文地址:http://www.cnblogs.com/litao0505/p/5347832.html