文章标题

package com.gexin.platform.open.service.other;

import java.util.HashMap;

import java.util.Map;

import java.util.Random;

public class RandomTest {

private static Map map = new HashMap<>();
private static int range = 100;private static Random rand = new Random();
public static void main(String[] args){
for(int i = 0 ;i<5000;i++){
map.put(rand.nextInt(range),"b");
System.out.println("size =" +map.size() + ",i=" + i);
}
}