JAVA高级基础（69）---多线程环境安全使用集合框架API

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在当前 jdk 下，即使我们要求集合要保证线程安全，我们也不会在去使用 vector 和 HahsTable

Collections

• synchronizedList(List<T> list)
• synchronizedMap(Map<K,V> m)
• synchronizedSet(Set<T> s)

package org.lanqiao.syn.demo;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

public class SynList {
	static  List<String> synList = null;
	public static void main(String[] args) {
		List<String> list = new ArrayList<>();
		synList= Collections.synchronizedList(list);
		synList.add("太");
		synList.add("原");
		synList.add("师");
		synList.add("范");
		
		new Thread(new Runnable() {
			
			@Override
			public void run() {
				for(int i = 0 ; i < 10 ; i++) {
					iterList();
					
				}
				}
			
		}).start();
		new Thread(new Runnable() {
			
			@Override
			public void run() {
				for(int i = 0 ; i < 10 ; i++) {
					
					iterList();
				}
				}
			
		}).start();
		
		
		
	}
	public static  synchronized void iterList() {
		Iterator<String> iter =	synList.iterator();
		while(iter.hasNext()) {
			System.out.print(iter.next());
		}
		System.out.println();
		
	}
	
	
}