/**
 * @author LiuYan
 * @date 2023年5月15日
 *
 * Switch表达式扩展,可以有返回值,
 * java12引入,java13 switch表达式增加yield关键字用于返回结果,作用类似于return,如果没有返回结果则使用break,java14环境可以编译运行
 *
 */
public class SwitchOptimization {

 public static void main(String[] args) {
 String grade = grade(100);
 System.out.println(grade);
 String newGrade= gradeOptimization(60);
 System.out.println(newGrade);
 }

 // Java8 switch()
 public static String grade(int score) {
 score /= 10;
 String grade = "";
 switch (score) {
 case 10:
 case 9:
 grade = "优秀";
 break;
 case 8:
 case 7:
 grade = "良好";
 break;
 case 6:
 grade = "及格";
 break;
 default:
 grade = "不及格";

 }
 return grade;
 }

 // Java14 switch()
 public static String gradeOptimization(int score) {
 score /= 10;
 return switch (score) {
 case 10, 9 -> "优秀";
 case 8, 7 -> "良好";
 case 6 -> "及格";
 default -> "不及格";
 };
 }

}