java 多线程 HashMap CPU占满

import java.util.HashMap;

import java.util.Map;

public class HashMapMultiThread {

static Map<String,String> map = new HashMap<String,String>();

public static class AddThread implements Runnable{

int start = 0 ;

public AddThread(int start){

this.start = start;

}

@Override

public void run() {

for (int i = 0; i < 10000; i+=2) {

map.put(Integer.toString(i), Integer.toBinaryString(i));

}

}

public static void main(String[] args) throws InterruptedException {

// 根据你的电脑CPU核数来配置 两核启两个线程就行

Thread t1 = new Thread(new HashMapMultiThread.AddThread(0));

Thread t2 = new Thread(new HashMapMultiThread.AddThread(1));

t1.start();

t2.start();

t1.join();

t2.join();

System.out.println(map.size());

}

}

}