Linux内存手动释放方法

先看代码

public class TwoThread extends Thread{
private Thread creatorThread;
public TwoThread(){
//对调用本方法的线程进行记录
creatorThread = Thread.currentThread();
}
public void run(){
for(int i=0; i<10; i++){
System.out.println("run");
printMsg();
}
}
public void printMsg(){
//对运行这一方法线程的引用
Thread t = Thread.currentThread();
if(t == creatorThread){
System.out.println("Creator Thread -- " + t.getName());
}else if(t == this){
System.out.println("New Thread -- " + t.getName());
}else{
System.out.println("Mystery Thread -- " + t.getName());
}
}
public static void main(String[] args){
TwoThread tt = new TwoThread();//调用构造方法，哪个线程调用？因为tt是由main线程创建所以由main线程调用构造方法？
tt.start();
for(int i=0; i<10; i++){
System.out.println("main");
tt.printMsg();//main线程调用
}
}
}

本程序先由main线程对tt线程进行创建，对tt线程进行创建的过程中由main线程调用其构造方法，则creatorThread是对main线程的引用。第29行对tt.printMsg()也是由main线程进行调用，与tt对象无关。
则打印结果为

main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
main
Creator Thread -- main
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0
run
New Thread -- Thread-0

本文出自 “混混” 博客，请务必保留此出处http://yimaoqian.blog.51cto.com/1328422/1393081