java自定义异常

package 异常和断言;

public class 自定义异常 {

public static void main(String[] args) {

try{

//抛出自定义异常，fd为异常信息

throw new d("fd");

}//捕捉自定义异常

catch(d e){

//调用getMessage方法

System.out.println(e.getMessage());

}//用finally输出最后一句话

finally{

System.out.println("This is my first Exception!Am Iclever?Please pass \"like\"!");

}

}

}

//自定义异常，继承Throwable

class d extends Throwable{

//用msg接收异常信息

String msg;

//继承Throwable的几个构造方法

d(){

super();

}

d(String msg){

super(msg);

//接收异常信息

this.msg=msg;

}

d(String msg,Throwable s){

super(msg,s);

}

d(Throwable s){

super(s);

}

//覆盖getMessage方法

public String getMessage(){

//返回msg，异常信息

return msg;

}

}