7.16test.java

JAVA程序设计的源代码

class MyException extends Exception{    //自定定义的异常类
public String toString() {
return "MyException";
}
}
public class Test{
void m() throws MyException{    //声明自定义的异常类
String s =new String();
if (s.equals ("") )
throw new MyException( );    //抛出自定义的异常类
}
public static void main(String args[]){
try{
Test i=new Test();
i.m();
}
catch(MyException e){    //捕获自定义的异常类
System.out.println(e);
}
}
}