swich

public class demo02 {
        public static void main(String[] args) {
            Scanner scanner=new Scanner(System.in);
            char a= '2';
            switch (a){
                case  '1':
                    System.out.println("不错！");
                    break;
                    case '2':
                    System.out.println("很好！");
                    break;
                    case '3':
                    System.out.println("非常好！");
                    break;
                default:
                    System.out.println("哈哈哈哈！");

scanner.close();
            }
        }
}

 

格式