ClarkGable的博客

初始类方法内调用方法自身public class RecursionDemo1 { public static void main(String[] args) { System.out.println("sum:1***5"); System.out.println(recur(5)); System.out.println("sum:1+++5"); System.out.println(recur1(5)); }

本例是懒汉模式负载均衡器类import java.util.ArrayList;import java.util.Random;class LoadBalancer { /**这里权限不写，默认，就是包内访问*/ /**懒汉模式*/ private static LoadBalancer lbInstance = null; /**成员变量，不是静态变量*/ private ArrayList serverList = null; public LoadB

@[toc]装饰模式定义抽象父类public abstract class InputStream { /** * 永远记住抽象类就是用来当父类的，不能创对象 */ public abstract int read(); public abstract int read(byte[] buffer);}定义子类的原始输入流import java.util.Arrays;public class FileInputStream extends Inp

dom4j和jaxen框架包自行搜索下载导入所用xml文件<?xml version="1.0" encoding="UTF-8" ?><contactList> <contact id="1" vip="true"> <name> Joseph </name> <gender> male </gender> <email> joseph@heaven

所用xml文件<?xml version="1.0" encoding="UTF-8" ?><contactList> <contact id="1" vip="true"> <name> Joseph </name> <gender> male </gender> <email> joseph@heaven.com </email>

初始XML写法<?xml version="1.0" encoding="UTF-8" ?><!-- comment is this format, and it will be displayed by green --><College> <Teacher> <name> 罗翔 </name> <gender> Female </gender> &

接口类public interface Users { String login(String loginName,int password); void deleteByID(int i); String query();}接口实现类public class UserService implements Users{ @Override public String login(String loginName, int password) {

接口类public interface Runway { void catwalk(); void pose();}接口实现类public class Model implements Runway{ private String name; public Model(String name) { this.name = name; } @Override public void catwalk() { S

自定义注解类import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;@Retention(RetentionPolicy.RUNTIME)public @interface MyUnit { boolean value() default true;}执行体import java.lang.reflect.InvocationTargetException;import j

本例使用的自定义注解类import java.lang.annotation.ElementType;import java.lang.annotation.Retention;import java.lang.annotation.RetentionPolicy;import java.lang.annotation.Target;@Target({ElementType.METHOD, ElementType.LOCAL_VARIABLE, ElementType.PARAM

文章目录一.给集合添加泛型以外的数据import java.lang.reflect.Method;import java.util.ArrayList;import java.util.List;public class reflectUseDemo1 { public static void main(String[] args) throws Exception { //反射的作用一，给指定了泛型的集合加入其他类型的数据 List<String

文章目录用于反射的学生类public class Student { private String name; private String gender; private int age; public static String school; public static final String nation = "NeverLand"; public Student() { System.out.println("No para

用于测试的对象类public class UserService { public String logon (String name,String password){ if ("admin".equals(name) && "1234".equals(password)){ return "login succeed."; }else { return "Your login name or pas

文章目录一.单线程服务端线程类import java.io.IOException;import java.io.PrintStream;import java.net.Socket;public class BSServerThread extends Thread{ private Socket soc; public BSServerThread(Socket soc) { this.soc = soc; } @Override

服务端，包括Runnable类import java.io.*;import java.net.ServerSocket;import java.net.Socket;import java.util.ArrayList;import java.util.List;import java.util.concurrent.*;public class GroupServerDemo1 { public static ExecutorService pool = new ThreadPo

服务端Runnable类import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.Socket;public class ServerRunnable implements Runnable{ private Socket soc; public ServerRunnab

服务端线程类import java.io.BufferedReader;import java.io.InputStream;import java.io.InputStreamReader;import java.net.Socket;public class ServerThread extends Thread { private Socket soc; public ServerThread(Socket soc) { this.soc = soc;

@[TOC]一.一条消息示例服务端import java.io.*;import java.net.ServerSocket;import java.net.Socket;public class TcpServerDemo2 { public static void main(String[] args) { try { System.out.println("=====TCP Server Started=====");

广播发送端public class udpBroadCastSourceDemo1 { public static void main(String[] args) throws Exception { System.out.println("====UDP Broadcast Client Started===="); DatagramSocket soc = new DatagramSocket();//发送端可以配端口，但多实例运行会java.net.Bin

发送端public class UdpClientDemo1 { public static void main(String[] args) throws Exception { /** * Socket是对TCP/IP协议的封装，建立套接字连接至少需要一对，一个运行在客户端，一个运行在服务端 * 套接字之间的连接分三步，服务端监听，客户端请求，连接确立 * 数据包构造参数第三段是服务端，接受方的地址，因为这里就一台电脑，所以

无说明public class InetAddressDemo1 { public static void main(String[] args) throws Exception { /** * 一个InetAddress类的对象就代表了一个IP地址对象，我们发现这些这些对象都不是new出来的 * 1.获取本机地址对象 * 2，获取域名IP对象，网址IP * 3.获取公网IP对象 * 4.判

一.Timer tim = new Timer()方式public class TimerDemo1 { public static void main(String[] args) { /** * 创建一个定时器Timer，Timer自己是一个单线程， Thread.currentThread().getName()打印出来会看到是Timer-0 * 调用Timer的方法schedule处理定时任务 * try_catch语

一.ExecutorService pool = new ThreadPoolExecutor方式不拿返回值的方法Runnable任务类代码public class MyRun implements Runnable { @Override public void run() { for (int i = 0; i < 5; i++) { System.out.println(Thread.currentThread().getName(

酒库类没用lock()和unlock()方法，运行报异常，还是在出入库方法各自用sync关键字修饰public class WineCellar { private String cellarName;//这个cellarName就是个意思 private double stock; public WineCellar() { } public WineCellar(String cellarName, double stock) { this

一.同步代码块锁账户类代码锁在此public class Account { private String accID; private double balance; public Account() { } public Account(String accID, double balance) { this.accID = accID; this.balance = balance; } public

账户类取钱方法在账户里，属于账户对象public class Account { private String accID; private double balance; public Account() { } public Account(String accID, double balance) { this.accID = accID; this.balance = balance; } public

线程类public class MyThread extends Thread{ public MyThread() { } public MyThread (String name){ super(name); } @Override public void run() { for (int i = 1; i < 6; i++) { System.out.println(Thread.cu

创建一个子线程public class multiThreadDemo1 { public static void main(String[] args) { myThread sub = new myThread(); sub.start(); for (int i = 0; i < 5; i++) { System.out.println("Main thread running~~~"); }

框架包到Commons_IO官网下载最新的public class commonsIODemo1 { public static void main(String[] args) throws Exception { /**文件复制到文件*/// IOUtils.copy(new FileInputStream("C:\\Users\\twx1157249\\Pictures\\Camera Roll\\荒野大镖客01.jpg"),//

打印字节流public class printDemo1 { public static void main(String[] args) throws Exception { PrintStream pst = new PrintStream("CertExam\\src\\pstTest01.txt"); /** * this(false, new FileOutputStream(fileName)); * this内部如下

所用类public class Student implements Serializable { private static final long serialVersionUID = 1; private String name; private String Gender; private int age; private transient int password; public Student() { } public St

txt内容略转换输入流public class InputStreamReaderDemo1 { public static void main(String[] args) { try (InputStream is = new FileInputStream("D:\\TxyUsual\\JetBrains\\20220519_TEST.txt"); /**原始必须是字节流，不能一上来用Reader新建一个FileReader，那样就没法指定字符集，也

txt内容Line1:!@#$%^&*()-=[]\;'./,ABCD1234abcdLine2:!@#$%^&*()-=[]\;'./,ABCD1234abcdLine3:!@#$%^&*()-=[]\;'./,ABCD1234abcdLine4:!@#$%^&*()-=[]\;'./,ABCD1234abcdLine5:!@#$%^&*()-=[]\;'./,ABCD1234abcdLine6:!@#$%^&*()-=[]

public class FileReaderDemo1 { public static void main(String[] args) throws Exception { Reader in = new FileReader("CertExam\\src\\dataTest.txt"); int code; /** * in.read()既然只读一个字符，所以返回的就是字节码，可以用int变量接，char(这个int)就得到原字

public class FileReaderDemo2 { public static void main(String[] args) throws Exception { Reader in = new FileReader("CertExam\\src\\dataTest.txt"); char[] chs = new char[7]; //7 chars int num; /** * in.read(cha

public class FileWriterDemo3 { public static void main(String[] args) throws IOException { Writer out = new FileWriter("CertExam\\src\\dataTest.txt",true); out.write(97); out.write("A"); out.write("@"); out.write

public class ByteBufferDemo1 { public static void main(String[] args) { try (InputStream in = new FileInputStream("CertExam\\src\\dataTest1.txt"); InputStream bin = new BufferedInputStream(in); OutputStream ou = new File

public class ByteBufferTimeUsageDemo2 { private static final String SRC_FILE = "D:\\TXYdownload\\install app\\ensp\\eNSP&CRT\\CE.img"; private static final String DEST_FILE = "D:\\TXYdownload\\install app\\ensp"; public static void main(Str

IO流的使用方法public class StreamDemo1 { public static void main(String[] args) { try { OutputStream os1 = new FileOutputStream("CertExam/src/dataTest.txt"); InputStream in1 = new FileInputStream("CertExam/src/dataTest.txt")

无目录执行体package com.gable.Run;import com.gable.Bean.Customer;import com.gable.Bean.Merchant;import com.gable.Bean.Movie;import com.gable.Bean.User;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.math.BigDecimal;import java.text