枚举enum

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枚举指由一组固定的常量组成的类型（java.lang.Enum）

java se 5.0引入

类型安全

易于输入

代码清晰

在枚举中，如果除了定义枚举常量，还定义了其他成员，则枚举常量列表必须以分号(;)结尾

//性别枚举

public enum Genders{

Male,Female;

}

public class Student {
private Genders sex;

public Genders getSex() {
return sex;
}

public void setSex(Genders sex) {
this.sex = sex;
}
}

//主函数里写

Student student = new Student();
student.setSex(Genders.Male);
System.out.println(student.getSex());

public class WeekDemo {public enum Week {MON, TUE, WED, THR, FRI, SAT, SUN}public void doWhat(Week day) {switch (day) {case MON:case TUE:case WED:case THR:case FRI:System.out.println("工作！");break;case SAT:System.out.println("休息！");break;}}public static void main(String[] args) {WeekDemo wd = new WeekDemo();wd.doWhat(Week.MON);}}

public enum Test { 雪铁龙("10万","东风"), 别克("15万","上海通用"), 雪弗兰("11万","上海通用"), CRV("13万","东本"), QQ("2万","吉利");  private String price; private String pinpai; private Test() {}private Test(String price, String pinpai) {this.price = price;this.pinpai = pinpai;}public String getPrice() {return price;}public void setPrice(String price) {this.price = price;}public String getPinpai() {return pinpai;}public void setPinpai(String pinpai) {this.pinpai = pinpai;}  //可以作为一种一对多 或一对一的映射转换 public static void main(String[] args) {for(Test t:Test.values()){System.out.println(t.pinpai+":"+t.price);}}}

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