Java/Swing：为什么我的JFileChooser打开了两次？

Question

public class PathBrowser {
public static String filepath = null;
public static void main(String[] args)
{

    JButton select = new JButton();
    JFileChooser browse = new JFileChooser();
    //add the icon of main form for JFileChooser
    //OPENS TWICE?! Error
    browse.showOpenDialog(MainForm.frame);

    //if blank goes to user/documents. Unsure about other OSes
    browse.setCurrentDirectory(new java.io.File("C:/"));
    browse.setDialogTitle("Browse Folder");
    browse.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    //when clicked open (approve option)
    if (browse.showOpenDialog(select) == JFileChooser.APPROVE_OPTION){
        //folder has peen selected
        MainForm.selfolder = true;
        //add the path to the string filepath
        filepath = (browse.getSelectedFile().getAbsolutePath());
        System.out.println("The path for the server is: "+browse.getSelectedFile().getAbsolutePath());
        //add the information to the textarea
        MainForm.textArea.setText("The path for the server is: "+browse.getSelectedFile().getAbsolutePath());
    }

}

}

谢谢

Answer 1

您正在两次调用Browse.showOpenDialog，这就是为什么您会得到两次它。

只需删除这一行：

browse.showOpenDialog(MainForm.frame);

若要保留框架的图标，请替换

browse.showOpenDialog(select)

browse.showOpenDialog(MainForm.frame)