[JAVA] 조건문

/*if문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        int num1 = 20;
        int num2 = 10;

        if (num1 > num2){
            System.out.println("num1 값이 더 크다");
            if(num2 > 5){
                System.out.println("num2 값은 5보다 크다");
            }
        }

        if(num1 < 10)
            System.out.println("num1 값은 10미만이다, num1:" + num1);
        else if(num1 < 20)
            System.out.println("num1 값은 20미만이다, num1:" + num1);
        else if(num1 < 30)
            System.out.println("num1 값은 30미만이다, num1:" + num1);
        else 
            System.out.println("num1 값은 30이상이다, num1:" + num1);

    }
}

num1 값이 더 크다
num2 값은 5보다 크다
num1 값은 30미만이다, num1:20

 

/*switch문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        int num = 2;

        switch (num) {
            case 1 :
                System.out.println("This is Case1");
                break;
            case 2 :
                System.out.println("This is Case2");
                break;
            case 3 :
                System.out.println("This is Case3");
                break;
            default :
                System.out.println("no match case");
        }

    }
}

This is Case2

 

/*switch문 예시*/
public class Test {
    public static void main(String[] args) throws Exception {
        char ch = 'B';

        switch (ch) {
            case 'A' :
            case 'a' :
                System.out.println("A or a");
                break;
            case 'B' :
            case 'b' :
                System.out.println("B or b");
                break;
            case 'C' :
            case 'c' :
                System.out.println("C or c");
                break;
            default :
                System.out.println("no match case");
        }

    }
}

B or b