myexception.java

苏州大学java学习的ppt课件

class UserException extends java.lang.Exception
{
	UserException(){
		 super();
		 System.err.println("User defined error");
	}
	UserException(String s){
		 super(s);
		 System.err.println("User defined error"+s);
	}

};
class TestException
{
	public TestException(){ System.out.println("User init");};
	public void test() throws  UserException{
		throw new UserException();
	}
};

public class MyException 
{
	public static void main(String[] args) 
	{

		System.out.println("Hello World!");
	  try{
	   	TestException te = new TestException();
          te.test();
    	}catch(Exception e){ System.err.println("catched");};
	
	}
}