Switch

package struct;

public class SwitchDemo1 {
    public static void main(String[] args) {
        //case 穿透   switch 匹配一个具体的值
        char grade = 'E';
        switch (grade){
            case 'A':
                System.out.println("优秀");
                break;
            case 'B':
                System.out.println("良好");
                break;
            case 'C':
                System.out.println("及格");
                break;
            case 'D':
                System.out.println("挂科");
                break;
            default:
                System.out.println("未知等级");

        }
    }
}

 

//JDK7的新特性，表达式可以是字符串

package struct;

public class SwitchDemo2 {
    public static void main(String[] args) {
        //JDK7的新特性，表达式可以是字符串
        String name = "xss";
        switch (name){
            case "lly":
                System.out.println("No");
            break;
            case "xss":
                System.out.println("Yes");
            break;
            default:
                System.out.println("not legal");
        }
    }
}