try{
    //可能會出錯(cuò)的代碼塊
}catch(){
    //出現(xiàn)異常后，執(zhí)行的語句
}finally{
    //通常用來釋放資源
}

public void fun1() throws ParseException {
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    Date date = format.parse("2020-10-12");
}

public void fun2() {
     throw new NullPointerException("空指針異常");  
     System.out.println("hello world");//會報(bào)紅，提示unreachable statement,該語句不可能被執(zhí)行
}

@Test
public void fun2()  {
    try {
        throw new Exception("非運(yùn)行時(shí)異常，哈哈哈");
    } catch (Exception e) {
        e.printStackTrace();
        try {
            throw new ParseException("解析異常，哈哈哈",0);
        } catch (Exception ex) {
            ex.printStackTrace();
        }
    }finally {
        try {
            throw new TimeoutException("超時(shí)異常，哈哈哈");
        } catch (TimeoutException e) {
            e.printStackTrace();
            try {
                throw new SQLException("SQL異常");
            } catch (SQLException ex) {
                ex.printStackTrace();
            }
        }
    }
}

public int  funR1(){
        try {
            return 1;
        }catch (Exception e){
           throw new RuntimeException();
        }
    }
public int  funR2(){
    if(true) {
        return 1;
    }else{
        throw new RuntimeException();
    }
}

public class HeroNotExistException extends RuntimeException {
    private String m;

    public String getM() {
        return m;
    }

    public void setM(String m) {
        this.m = m;
    }
//兩個(gè)參數(shù)的有參構(gòu)造，一個(gè)傳遞給父類Throwable,一個(gè)自己用
    public HeroNotExistException(String message, String m){
       super(message);
       this.m=m;
    }

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        System.out.println("請輸入您最欣賞的歷史人物：");
        String name = sc.next();
        if(name.equals("孫悟空")){
            try{
                throw new HeroNotExistException("英雄人物不存在","哈哈");
            }catch (HeroNotExistException e){
                e.printStackTrace();
                System.out.println(e.getM());
            }
        }
    }
    
}