package t1t2t3t4;/** * Created by Administrator on 2017/5/13. * Created by A
阅读背景：
四个线程t1,t2,t3,t4,分别打印文字，t1只能打印1，t2只能打印2，t3只能打印3，t4只能打印4，打印如下A B C D内容: A:123412341234 B:234123412341
来源：互联网
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