自定義異常 以及使用

public?class?ExceptionTest?extends?Exception{

????public?ExceptionTest(){

?????????

????}

????public?ExceptionTest(String?message){

????????super(message);

????}

????public?void?dunkOrNot(int?select)?throws?ExceptionTest{

????????if(select==1){

????????????throw?new?ExceptionTest("你喝大了");

????????}

????????else{

????????????System.out.println("你沒喝醉");

????????}

????}

????public?static?void?main(String[]?args)throws?ExceptionTest?{

????????ExceptionTest?et=new?ExceptionTest();

????????int?select=1;

????????try{

????????et.dunkOrNot(select);

????????}

????????catch(ExceptionTest?e){

????????????System.out.println("發現異常："+e.getMessage());

????????}

????}

}

? ? 結果是什么？

e.getMessage(); 只會獲得具體的異常名稱. 比如說NullPoint 空指針,就告訴你說是空指針...

輸出捕捉到的異常信息，也就是那段描述性信息