Java软贱攻城狮

多例模式：范例1：class Color { private String title; private static final Color RED = new Color("红色"); private static final Color BLUE = new Color("蓝色"); private static final Color GREEN = new Color("绿色")...

范例1：扩充枚举功能enum Color { RED("红色"),GREEN("绿色"),BLUE("蓝色"); private String title; private Color(String title) { this.title=title; } @Override public String toString() { return this.title; } ...

范例1：枚举可以直接在switch上使用enum Color { RED, BLUE, GREEN; } public class Demo { public static void main(String[] args) { Color c = Color.GREEN; switch (c) { case RED: System.out.println("红色"); ...