修改文件最后的修改日期

import java.io.File;
import java.util.Date;
 
public class Main {
    public static void main(String[] args) throws Exception {
        File fileToChange = new File("C:/myjavafile.txt");
        fileToChange.createNewFile();
        Date filetime = new Date(fileToChange.lastModified());
        System.out.println(filetime.toString());
        System.out.println(fileToChange.setLastModified(System.currentTimeMillis()));
        filetime = new Date(fileToChange.lastModified());
        System.out.println(filetime.toString());
    }
}

以上代码运行输出结果为：

Sat Mar 21 22:00:48 CST 2015
true
Fri Apr 10 11:09:19 CST 2015