如果你发现在一个接口使用有如下定义方法: public String[] getParameters(); 那么你应该认真反思.数组不仅仅老式,而且我们有合理的理由避免暴露它们.在这篇文章中,我将试图总结在Java API中使用数组的缺陷.首先从最出人意料的一个例子开始. 数组导致性能不佳 你可能认为使用数组是最快速的,因为数组是大多数collection实现的底层数据结构.使用一个纯数组怎么会比使用一个包含数组的对象性能更低? 让我们先从这个看起来很熟悉的普遍的习惯用法开始: public S
关于Ordered接口,用过的人可能知道,这里我谈下自己的理解.也希望各位大神能给予指点. 源码如下: /** * Interface that can be implemented by objects that should be * orderable, for example in a Collection. * * <p>The actual order can be interpreted as prioritization, with * the first objec
原文 https://stackoverflow.com/questions/28240528/how-do-i-duplicate-a-resource-reference-in-code-behind-in-wpf 如何在WPF后台代码中中复制引用的资源? In my application, I have a color resources. I have one element that uses that color as a dynamic resource in xaml. <Wi
Introduction to Functional Interfaces – A concept recreated in Java 8 Any java developer around the world would have used at least one of the following interfaces: java.lang.Runnable,java.awt.event.ActionListener, java.util.Comparator,java.util.concu
1.容器TreeMap,默认根据Key对象中某个属性的从小到大排列元素. (1)如下代码示例,Key是整型数字,所以按照其从小到大的顺序排列 public class TestTreeMap { public static void main(String[] args){ TreeMap<Integer,String> treeMap = new TreeMap<>(); treeMap.put(100,"1号"); treeMap.put(102,"