study10

Exception01

import java.util.Scanner;

public class Exception01 {
	Scanner sc =new Scanner(System.in);
	public static void main(String[] args) {
		Exception01 e = new Exception01(); //Exception01객체생성
        e.process();
		e.process2();
		e.process3();
		e.process4();
	}

public void process() {
		int a = 10;
		int b = 0;
		//런타임 Exception
		//ArithmeticException:
		if(b==0) { //b가 
			System.out.println("0으로는 나눌수 없습니다.");
			return;// 메소드 즉시 종료
		}
		System.out.println(a/b);
	}

Exception02

public class Exception02 {
	Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
    Exception02 e2 = new Exception02();
		e2.method1();
 }

 

public void method1() {
		while(true) {
			try {			
				String id = inputId(); // 에러 처리 여기서 함
				String Pass = inputPass(); // 에러 처리 여기서 함
				System.out.println("id : "+id);
				System.out.println("Pass : "+Pass);
				break;// try문 true면 종료
			} catch (Exception e) {
				System.out.println(e);
			}
		}
	}

public String inputId() throws NicNameException { //methdo1에서 에러 처리하게 던짐
			System.out.println("입력하시오");
			String id = sc.next();
			if(id.contains("aa")) {
				throw new NicNameException();
			}
			if(id.length()>10) {
				throw new NicNameException();			
			}
		return id;
	}

public String inputPass() throws NicNameException { //methdo1에서 에러 처리하게 던짐
			System.out.println("입력하시오");
			String id = sc.next();
			if(id.contains("aa")) {
				throw new NicNameException();
			}
			if(id.length()>10) {
				throw new NicNameException();			
			}
			return id;
		}
}

NicNameException

public class NicNameException extends RuntimeException{
	public NicNameException() {
		super("부적절한 닉네임 입니다.");
	}
}