多线程

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  package com.zrm.thread;
  
  /**
   * 同过实现Runnable接口并实现run方法来创建一个新的线程
   */
  public class RunDemo implements Runnable {
      @Override
      public void run() {
          for (int i = 0; i < 1000; i++) {
              System.out.println(Thread.currentThread().getName() + "" + "线程执行的第" + i + "次");
          }
      }
  
      public static void main(String[] args) {
          RunDemo runDemo = new RunDemo();
          Thread thread = new Thread(runDemo);
          thread.start();
          for (int i = 0; i < 1000; i++) {
              System.out.println(Thread.currentThread().getName() + "" + "线程执行的第" + i + "次");
          }
      }
  }

  package com.zrm.thread;
  
  /**
   * 通过集成Thread类并从写run方法来创建线程
   */
  public class ThreadDemo extends Thread {
      @Override
      public void run() {
          for (int i = 0; i < 1000; i++) {
              System.out.println(Thread.currentThread().getName() + "线程执行的第" + i + "次");
  //            try {
  //                Thread.sleep(1000);
  //            } catch (InterruptedException e) {
  //                e.printStackTrace();
  //            }
          }
  
      }
  
      public static void main(String[] args) throws InterruptedException {
          ThreadDemo demo = new ThreadDemo();
          demo.start();
          for (int i = 0; i < 1000; i++) {
              System.out.println(Thread.currentThread().getName() + "线程执行的第" + i + "次");
  //            Thread.sleep(1000);
          }
      }
  }

  //同步代码块实现
  package com.zrm.thread;
  
  public class Ticket implements Runnable {
      private Integer NUMBER = 10;
  
      @Override
      public void run() {
          for (int i = 0; i < 100; i++) {
              try {
                  Thread.sleep(1000);
              } catch (InterruptedException e) {
                  e.printStackTrace();
              }
              synchronized (this) {
                  if (NUMBER > 0) {
                      NUMBER--;
                      System.out.println(Thread.currentThread().getName() + "买到了第" + NUMBER + "张票");
                  }
              }
  
          }
      }
  
      public static void main(String[] args) {
          Ticket ticket = new Ticket();
          Thread thread = new Thread(ticket, "A");
          Thread thread2 = new Thread(ticket, "B");
          Thread thread3 = new Thread(ticket, "C");
          Thread thread4 = new Thread(ticket, "D");
          thread.start();
          thread2.start();
          thread3.start();
          thread4.start();
      }
  }

  package com.zrm.thread;
  
  public class SynMethod implements Runnable {
      private int NUMBER = 100;
  
      @Override
      public void run() {
          for (int i = 0; i < 100; i++) {
              this.sale();
          }
      }
  
      //同步方法实现
      public synchronized void sale() {
          if (this.NUMBER > 0) {
              System.out.println(Thread.currentThread().getName() + "买到了票" + this.NUMBER--);
          }
      }
  
      public static void main(String[] args) {
          Ticket ticket = new Ticket();
          Thread thread = new Thread(ticket, "A");
          Thread thread2 = new Thread(ticket, "B");
          Thread thread3 = new Thread(ticket, "C");
          Thread thread4 = new Thread(ticket, "D");
          thread.start();
          thread2.start();
          thread3.start();
          thread4.start();
      }
  }