mycheckedexception.java

高等院校计算机应用技术硕士研究生课程,高级计算机网络程序设计实例子代码,exception部分.

import java.io.*;

//自己的例外类
class MyCheckedException extends Exception 
{
	public MyCheckedException() 
	{
		super();
	}
	public MyCheckedException(String s) 
	{
		super(s);
	}
}

class Catapult
{
	//方法入口
	public static void main(String args[]) 
	{
		System.out.println("Starting Catapult");
		myMethod1();
    	}
 
	public static void myMethod1() 
	{
		try 
		{
			System.out.println("Entering myMethod1()");
			//方法myMethod2()抛出了例外，所以必须被捕捉
			myMethod2();
                        System.out.println("This line never executes");
      		}
     		catch(MyCheckedException e) 
     		{
        		//打印个人例外信息
        		System.out.println("Caught MyCheckedException in myMethod1");
       			System.out.println("Printing stack trace of the Exception's origin:");
       			//打印系统例外栈
         		e.printStackTrace();
      		}
      		finally 
      		{
          		//调用finally方法
          		System.out.println("Executing myMethod1() finally clause");
       		}
    	}

	//方法通过throws关键字抛出了自定义的例外
   	public static void myMethod2() throws MyCheckedException 
   	{
       		try 
       		{
         		System.out.println("Entered MyMethod2 and throwing MyCheckedException");
         		//使用throw关键字强制抛出例外
          		throw new MyCheckedException("Jim's Exception");
        	}
      		finally 
      		{
          		System.out.println("Executing myMethod2() finally clause");
     		}
  	}
}