两个线程,一个每分钟写入当前时间到指定文件,另一个线程读出每分钟新写的内容。
使用简单的Thread.sleep技术实现定时
package test.thread;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.Date;
/**
* 多线程读写同一个文件的样例。
*
* @author 赵学庆 www.java2000.net
*/
public class ThreadReadWrite {
public static void main(String[] args) {
new ThreadWrite().start();
try {
Thread.sleep(2000); // 休眠,以免那面还有写好
} catch (InterruptedException e) {
e.printStackTrace();
}
new ThreadRead().start();
}
}
class ThreadWrite extends Thread {
File file = new File("test.txt");
@Override
public void run() {
try {
while (true) {
FileWriter out = new FileWriter(file, true);// 追加写入
out.write(new Date() + "\n");
out.flush();
out.close();
Thread.sleep(3000); // 我这里间隔改成3秒,方便测试
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
class ThreadRead extends Thread {
File file = new File("test.txt");
@Override
public void run() {
try {
BufferedReader reader = new BufferedReader(new FileReader(file));
while (true) {
System.out.println(reader.readLine());
Thread.sleep(3000); // 我这里间隔改成3秒,方便测试
}
} catch (Exception e) {
e.printStackTrace();
}
}
}