panhao88的博客

将HashMap通过value或value对象中的某个变量、对象进行排序，首先要将value取出保存在list里面 Collection<Student> c1 = m1.values(); List<Student> l1 = new ArrayList<Student>();

当网页的字符集和本地的不一致时，两种转码方式 //本地字符集为utf-8 URL url = new URL("https://game.qq.com");//该网站字符集为gb2312 try(BufferedWriter bw = new BufferedWriter(new FileWriter("url.txt")); BufferedReader br = new Buffer...

使用Lambda语法来代替匿名的内部类 package com.thread; import java.io.File; import java.io.FileFilter; public class TestLambda02 { static class Testlam implements Sum { @Override public int sum(int a, int b) ...