7.19customizedexceptiondemo.java

来自「JAVA程序设计的源代码」· Java 代码 · 共 23 行

import java.io.*;
class MyArithmeticException extends ArithmeticException {    //自定义的异常
public MyArithmeticException() {}
public MyArithmeticException(String msg) { super(msg); }
}

public class CustomizedExceptionDemo
{
int divide(int d1,int d2) throws MyArithmeticException {    //声明自定义的异常
if (d2 == 0) throw new MyArithmeticException("divide by zero");   //抛出自定义的异常
return d1/d2;
}
public static void main(String []args) {
CustomizedExceptionDemo demo = new CustomizedExceptionDemo( );
try {
demo.divide(1,0);
}catch (MyArithmeticException e) {    //捕获自定义的异常
System.out.println( "Caught exception: "+ e.getMessage( ) );
}
}
}