Java語言中的枚舉類型的使用方法如下：
用法壹：常量；
public?enum?Color?{? RED,?GREEN,?BLANK,?YELLOW?}
用法二：switch；
?enum?Signal?{GREEN,?YELLOW,?RED
}
public?class?TrafficLight?{
Signal?color?=?Signal.RED;
public?void?change()?{
switch?(color)?{
case?RED:
color?=?Signal.GREEN;
break;
case?YELLOW:
color?=?Signal.RED;
break;
case?GREEN:
color?=?Signal.YELLOW;
break;
}
}
}
用法三：向枚舉中添加新方法；
public?enum?Color?{RED("紅色",?1),?GREEN("綠色",?2),?BLANK("白色",?3),?YELLO("黃色",?4);
//?成員變量
private?String?name;
private?int?index;
//?構造方法
private?Color(String?name,?int?index)?{
this.name?=?name;
this.index?=?index;
}
//?普通方法
public?static?String?getName(int?index)?{
for?(Color?c?:?Color.values())?{
if?(c.getIndex()?==?index)?{
return?c.name;
}
}
return?null;
}
//?get?set?方法
public?String?getName()?{
return?name;
}
public?void?setName(String?name)?{
this.name?=?name;
}
public?int?getIndex()?{
return?index;
}
public?void?setIndex(int?index)?{
this.index?=?index;
}
}
用法四：覆蓋枚舉的方法；
public?class?Test?{public?enum?Color?{
RED("紅色",?1),?GREEN("綠色",?2),?BLANK("白色",?3),?YELLO("黃色",?4);
//?成員變量
private?String?name;
private?int?index;
//?構造方法
private?Color(String?name,?int?index)?{
this.name?=?name;
this.index?=?index;
}
//?覆蓋方法
@Override
public?String?toString()?{
return?this.index?+?"_"?+?this.name;
}
}
public?static?void?main(String[]?args)?{
System.out.println(Color.RED.toString());
}
}
用法五：實現接口；
public?interface?Behaviour?{void?print();
String?getInfo();
}
public?enum?Color?implements?Behaviour?{
RED("紅色",?1),?GREEN("綠色",?2),?BLANK("白色",?3),?YELLO("黃色",?4);
//?成員變量
private?String?name;
private?int?index;
//?構造方法
private?Color(String?name,?int?index)?{
this.name?=?name;
this.index?=?index;
}
//?接口方法
@Override
public?String?getInfo()?{
return?this.name;
}
//?接口方法
@Override
public?void?print()?{
System.out.println(this.index?+?":"?+?this.name);
}
}
用法六：使用接口組織枚舉。
public?interface?Food?{enum?Coffee?implements?Food?{
BLACK_COFFEE,?DECAF_COFFEE,?LATTE,?CAPPUCCINO}
enum?Dessert?implements?Food?{ FRUIT,?CAKE,?GELATO }}
以上就是Java語言中枚舉類型的基本使用方法。