java创建线程池的几种方式(代码)

```java
package com.example.demo.thread;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.TimeUnit;

public class ThreadPoolTest {

    public static void main(String[] args) {
//        cacheThreadPool();
//        fixTheadPoolTest();
//        singleTheadPoolTest();
//        scheduleThreadPool();
    }


    
    public static void cacheThreadPool() {
        ExecutorService cachedThreadPool = Executors.newCachedThreadPool();
        for (int i = 1; i <= 10; i++) {
            final int ii = i;
            try {
                Thread.sleep(ii * 1);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
           cachedThreadPool.execute(()->System.out.println("线程名称：" + Thread.currentThread().getName() + "，执行" + ii));
            
        }
    }


    
    public static void fixTheadPoolTest() {
        ExecutorService fixedThreadPool = Executors.newFixedThreadPool(3);
        for (int i = 0; i < 10; i++) {
            final int ii = i;
            fixedThreadPool.execute(() -> {
                System.out.println("线程名称：" + Thread.currentThread().getName() + "，执行" + ii);
                try {
                    Thread.sleep(2000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            });
        }
    }

    
    public static void singleTheadPoolTest() {
        ExecutorService pool = Executors.newSingleThreadExecutor();
        for (int i = 0; i < 10; i++) {
            final int ii = i;
            pool.execute(() -> {
                try {
                    System.out.println(Thread.currentThread().getName() + "=>" + ii);
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            });
        }
    }


    
    public static void scheduleThreadPool() {
        ScheduledExecutorService scheduledThreadPool = Executors.newScheduledThreadPool(5);

        Runnable r1 = () -> System.out.println("线程名称：" + Thread.currentThread().getName() + "，执行:3秒后执行");
        scheduledThreadPool.schedule(r1, 3, TimeUnit.SECONDS);

        Runnable r2 = () -> System.out.println("线程名称：" + Thread.currentThread().getName() + "，执行:延迟2秒后每3秒执行一次");
        scheduledThreadPool.scheduleAtFixedRate(r2, 10, 3, TimeUnit.SECONDS);

        Runnable r3 = () -> System.out.println("线程名称：" + Thread.currentThread().getName() + "，执行:普通任务");
        for (int i = 0; i < 5; i++) {
            scheduledThreadPool.execute(r3);
        }
    }




}