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能用就用,不能用就不用 范例表示颜色多例模式: package cn; class Color { private String title ; private static final Color RED = new Color("red") ; private static final Colo 阅读全文
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package cn; class Message <T> { private T msg ; public T getMsg() { return msg; } public void setMsg(T msg) { this.msg = msg; } } public class Test { 阅读全文
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package cn; class Point <T>{ //Type = T , 是一个类型 private T x ; private T y ; public void setX(T x){ this.x = x ; } public T getX() { return x; } public 阅读全文