我正在制作一个旨在作为备份的程序。我有SwingWorker
做备份并发布它正在做什么JTextArea
。我希望有一个按钮取消工人,(有一次initiallized他们的未知量),所以这是我对挥杆工人的电话,和取消方法:取消SwingWorker的问题
package main;
import java.io.File;
import java.util.ArrayList;
import javax.swing.SwingWorker;
public class test2 {
SwingWorker bw;
static ArrayList bgWorker = new ArrayList();
ArrayList al = new ArrayList(); // this is the list of files selected
static boolean bwInitiallized = false;
public void startBackup() throws Exception {
Panel.txtArea.append("Starting Backup...\n");
for (int i = 0; i < al.size(); i++) {
/**
* THIS IS WHERE I NEED TO CREATE THE FOLDER THAT EACH BACKUP FILE
* WILL GO INTO EX: SC2 GOES INTO A FOLDER CALLED SC2 AND RIOT GOES
* TO RIOT, ALL WITHIN THE DIRECTORY CHOSEN
*/
File file = new File((String) al.get(i));
File directory = new File(dir); // dir is gotten by a JFileChooser.
bw = new BackgroundWorker(Panel.txtArea, file, directory);
bgWorker.add(bw);
bwInitiallized = true;
bw.execute();
/**
* follows to the bottom of the txtarea
*/
int x;
Panel.txtArea.selectAll();
x = Panel.txtArea.getSelectionEnd();
Panel.txtArea.select(1, x);
}
}
public static void cancel() {
BackgroundWorker bg;
if (bwInitiallized) {
bwInitiallized = false;
Panel.txtArea.append("Cancelling...\n");
for (int i = 0; i < bgWorker.size(); i++) {
bg = (BackgroundWorker) bgWorker.get(i);
bg.cancel(true);
}
Panel.txtArea.append("Canceled backUp!\n");
} else {
Panel.txtArea.append("Cannot Cancel! Not Initiallized!\n");
}
}
}
好,因为我无法弄清楚的原因,这并不能取消任何一项(据我所知)。我能想到的唯一的事情是当我做
bg = (BackgroundWorker) bgWorker.get(i);
bg.cancel(true);
它不做我认为它,但idk。我究竟做错了什么?提前致谢!
请改善您的Java标识符的命名,使其符合标准。我们很难去理解别人的代码,他们不需要为我们更难。另请考虑创建并发布[sscce](http://sscce.org)。您在此的努力将不胜感激。 –
我对你的命名可能是错的;它可能是好的。面板是静态字段的类吗?如果是这样,yuck。 –
即时通讯不知道你的意思...记住,我仍然有点小菜 – PulsePanda