谁知道 Java多线程并发编程

2020年10月18日 星期日 seo网站关键词优化

 

标签:extends实现strdesstaradeoverriprun

java多线程并发编程:

重新学习下多线程并发编程

java基础:优先队列:PriorityQueue、数组赋值:System.arraycopy、二分搜索:Arrays.binarySearch

查看死锁(面试会问,比较好玩):

1. 命令行:jps
2. 查看堆栈:jstack pid
3. 可视化工具:jconsole

死锁的创建与命令使用:

import java.util.Arrays;

/**
 * @ProjectName: test2
 * @Package: PACKAGE_NAME
 * @Description:
 * @Author: huyuqiao
 * @CreateDate: 2020/10/15 14:57
 */
public class test2 {
    private static final Object A = new Object();
    private static final Object B = new Object();

    public static void main(String[] args){

       /* String[] arr = {"A","B","C","D","E","F"};
        System.arraycopy(arr, 3, arr, 0, 2);
        Arrays.stream(arr).forEach(System.out::println);*/

     /*   int a[] = new int[] {1, 3, 3, 3, 4, 6, 8, 9};
        System.out.println(Arrays.binarySearch(a, 1));*/

/*        new Thread(() >{
            synchronized (A){
                try{
                    Thread.sleep(3000);
                } catch (Exception e){
                    e.printStackTrace();
                }
                synchronized (B){
                    System.out.println("线程A");
                }
            }

        }).start();
        new Thread(() > {
            synchronized (B){
                synchronized (A){
                    System.out.println("线程B");
                }
            }
        }).start();*/

    }


}

? 线程创建:

  1. 继承Thread

    /**
     * @ProjectName: MyThread
     * @Package: PACKAGE_NAME
     * @Description:
     * @Author: huyuqiao
     * @CreateDate: 2020/10/15 16:57
     */
    public class MyThread extends Thread {
        @Override
        public void run() {
            System.out.println("当前线程: " + Thread.currentThread().getName());
        }
        public static void main(String[] args){
            MyThread myThread = new MyThread();
            myThread.setName("线程DEMO");
            myThread.start();
        }
    }
    
    
  2. 实现Runnable接口

    /**
     * @ProjectName: MyRunnable
     * @Package: PACKAGE_NAME
     * @Description:
     * @Author: huyuqiao
     * @CreateDate: 2020/10/15 17:00
     */
    public class MyRunnable implements Runnable {
    
        @Override
        public void run() {
            System.out.println("当前线程名: " + Thread.currentThread().getName());
        }
        public static void main(String[] args){
            MyThread myThread = new MyThread();
            myThread.setName("线程Runnable");
            myThread.start();
            myThread.run();
        }
    }
    
    
  3. 匿名内部类

            Thread thread = new Thread(new Runnable() {
                @Override
                public void run() {
                    System.out.println("当前线程名:" + Thread.currentThread().getName());
                }
            });
            thread.start();
    
  4. lambda表达式

        public static void main(String[] args){
            new Thread(()>{
                System.out.println("当前线程名: " + Thread.currentThread().getName());
            }).start();
        }
    
  5. 线程池

        public static void main(String[] args){
            ExecutorService ex = Executors.newSingleThreadExecutor();
            ex.execute(()>{
                System.out.println("当前线程名;" + Thread.currentThread().getName());
            });
        }
    

Java多线程并发编程

标签:extends实现strdesstaradeoverriprun

原文地址:https://www.cnblogs.com/meditation5201314/p/13822504.html

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