package com.zishi.struct;
public class SwitchDemo01 {
public static void main(String[] args) {
//case穿透 //switch 匹配一個具體的值
char grade = 'D';
switch (grade){
case 'A':
System.out.println("優秀");
break;//可選
case 'B':
System.out.println("良好");
break;
case 'C':
System.out.println("中等");
break;
case 'D':
System.out.println("及格");
case 'E':
System.out.println("不及格");
default:
System.out.println("成績未知");
}
}
}
package com.zishi.struct;
public class SwitchDemo02 {
public static void main(String[] args) {
String name = "一只肥";
//JDK7新特性，表達式結果可以是字符串
//字符串的本質還是數字
//反編譯 java----class(字節碼文件)-----反編譯（idea）
switch (name){
case "一只肥":
System.out.println("一只肥");
break;
case "二只肥":
System.out.println("二只肥");
break;
case "三只肥":
System.out.println("三只肥");
break;
default :
System.out.println("蛤");
}
}
}
//
// Source code recreated from a .class file by IntelliJ IDEA
// (powered by Fernflower decompiler)
//
package com.zishi.struct;
public class SwitchDemo02 {
public SwitchDemo02() {
}
public static void main(String[] args) {
String name = "一只肥";
byte var3 = -1;
switch(name.hashCode()) {
case 19888123:
if (name.equals("一只肥")) {
var3 = 0;
}
break;
case 19896772:
if (name.equals("三只肥")) {
var3 = 2;
}
break;
case 20022663:
if (name.equals("二只肥")) {
var3 = 1;
}
}
switch(var3) {
case 0:
System.out.println("一只肥");
break;
case 1:
System.out.println("二只肥");
break;
case 2:
System.out.println("三只肥");
break;
default:
System.out.println("蛤");
}
}
}