Java测试守护线程的代码

import java.io.File;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.io.OutputStreamWriter;

import java.util.Scanner;

class DaemonThread implements Runnable{

@Override
public void run() {
System.out.println("进入守护线程"+Thread.currentThread().getName());
try {
writeToFile();
} catch (Exception e) {

e.printStackTrace();
}
System.out.println("退出守护线程"+Thread.currentThread().getName());

}
void writeToFile() throws Exception{
File filename = new File("D:"+File.separator + "daemon.txt");
OutputStream os = new FileOutputStream(filename,true);
int count = 0;
while(count<999){
os.write(("\r\nword"+count).getBytes());
System.out.println("守护线程"+Thread.currentThread().getName()+
"向文件中写入了word"+count++);
Thread.sleep(1000);
}

}

}

public class DaemonThreadDemo {

public static void main(String[] args) {
System.out.println("程序进入了主线程"+Thread.currentThread().getName());
DaemonThread daemonThread = new DaemonThread();
Thread thread = new Thread(daemonThread);
thread.setDaemon(true);
thread.start();

Scanner sc = new Scanner(System.in);
sc.next();
System.out.println("退出主线程"+Thread.currentThread().getName());

}

}