HashMapがデッドサイクルに陥った例
4077 ワード
// HashMap ， 。
1 package com.hanzi;
2
3 import java.util.HashMap;
4
5 public class HashMapInfiniteLoop {
6 private HashMap hash = new HashMap(500);
7
8 public HashMapInfiniteLoop() {
9 Thread t1 = new Thread() {
10 public void run() {
11 for (int i = 0; i < 500000; i++) {
12 hash.put(new Integer(i), Integer.valueOf(i));
13 }
14 System.out.println("t1 over");
15 }
16 };
17 Thread t2 = new Thread() {
18 public void run() {
19 for (int i = 0; i < 500000; i++) {
20 hash.put(new Integer(i),Integer.valueOf(i));
21 }
22 System.out.println("t2 over");
23 }
24 };
25 t1.start();
26 t2.start();
27 }
28
29 public static void main(String[] args) {
30 new HashMapInfiniteLoop();
31 }
32 }