阅读之后，对你有帮助，那就点个赞再走吧

public class ThreadTest extends Thread { private int count = 10; @Override public void run() { super.run(); while (true){ System.out.println(count); if(--count == 0){ return; .

interface Constants { public static final int Constants_A = 1; public static final int Constants_B = 12;}public class ConstantsTest { enum Constants2{ Constants_A,Constants_B } public static void doit(int c){ switch.

public class Example_01 { String s; int i,i2,i3; private Example_01(){} protected Example_01(String s,int i){ this.s = s; this.i = i; } public Example_01(String... strings) throws NumberFormatException{ if(.

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;//文件输入流和文件输出流public class FileStream { public static void main(String[] args) { File file = new File("word.txt"); try { FileOutputStream.

今天在学习算法的时候发现了一个java的奇淫技巧的函数。背景：给你一个字符串，找到它第一个不重复的字符，返回字符索引。目的：使用HashMap getOrDefault(key, defaultValue)函数，来找到第一个不重复的字符。过程：我给大家解释一下使用这个函数的解这个题的基本思路哈。就是定义一个hashmap函数map，key是字符，value是map.getOrDefault(字符，0)+1。为啥子要+1呢。函数的解释：getOrDefault() 方法获取

import java.util.ArrayList;import java.util.Collection;import java.util.Iterator;//collection接口public class coll { public static void main(String[] args) { Collection<String> list = new ArrayList<>(); list.add("a"); .

/** * 1JFrame窗体 */import javax.swing.*;//导入awt包import java.awt.*;//导入swing包/** * 第一个窗体（JFrame窗体） */public class JFrameTest extends JFrame{//定义一个类继承HFrame类 public void CreateJFrame(String title) {//定义一个CreateJframe类 JFrame jf = new J.

此处是包。package error.test;public class MyError extends Exception { public MyError(String ErrorMessage){ super(ErrorMessage); }}import error.test.MyError;public class ErrorTest {// public static void main(String[] args) {// ..

这个com/lzw就是包。package com.lzw;public class Math { public void test1(){ System.out.println("this is math"); } public static void main(String[] args) { System.out.println("this not is java.lang.Math class ,so this is com.lzw..

public class Test extends Object{ public Test(){ } protected void doSomething(){ } protected Test dolt(){ return new Test(); }}public class Test2 extends Test { public Test2(){ super(); super.

public class IntegetLearn { public static void main(String[] args) {// Integer number = new Integer("23");// System.out.println(number); String str[] = {"89", "12", "10", "18", "35"}; int sum = 0; for (int i = 0.

public class ClassLearn1 { /** * 类的使用 */ private String name; public String getName(){ int id = 0; setName("java"); return id + this.name; } private void setName(String name) { this.name = na.

public class ArrayLearn1 { /** * 一维数组的使用 */ public static void main(String[] args) { int arr[] = new int[10];//声明数组，并且分配内存空间 for (int item: arr ) { System.out.println(item); } fo.

public class Compound { public static void main(String args[]) { String a = "good"; System.out.println(a); char b[] = {'h','e','l','l','o'}; String s = new String(b); System.out.println(a); char d[] =.

public class Compound{ public static void main(String args[]) { int x = 10; int j = 40; { int y = 40; System.out.println(y); int z = 245; boolean b; { .

package Number;public class Frist { static String s1 = "你好"; static final double PI = 3.14;// int m = 123; public static void main(String[] args) { String s2 = "Java"; System.out.println(s1); System.out.prin.

public class HelloJava{ public static void main(String[] args){ System.out.println("123123adasd"); }}