详解如何把cmd黑窗口把java文件打包成jar

import java.io.File;
import java.util.Calendar;
import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;
public class quarty1 extends TimerTask {
    private static final String targetPath1 = "C:UsersAdministratorDownloads";
    //private static final String targetPath2 = "D:kankanVaCache";
    private Timer timer = new Timer();

    private Calendar calendar = Calendar.getInstance();
    public static void main(String[] args) {
        quarty1 fm = new quarty1();
        fm.start();
    }
    private static void delFiles(String[] dir) {
        for (int i = 0; i