JPanel直到代码之后才显示-JPaneldoesnotshowuntilafterthecode

What I want to do is to show a new panel with a progress bar while the process takes place.

我想要做的是在进程发生时显示带有进度条的新面板。

My code is as follows:

我的代码如下:

case "GoButton":
    cards.show(this, "pp");
    this.test();
    cards.show(this, "panel1");
    break;

That is in a actionPerformed method

这是在actionPerformed方法中

but when I run the program it just ignores the first cards.show, it executes the test code and then it executes the second cards.show

但是当我运行程序时它只是忽略了第一个cards.show,它执行测试代码,然后执行第二个cards.show

I also provide you the rest of the code in case you need it

如果您需要,我还会为您提供其余的代码

public CreatePanel(JFrame frame) {
        ext = new ArrayList<>();
        files = new ArrayList<>();

        this.mainWindow = frame;
        this.setSize(256, 256);
        cards = new CardLayout();
        this.setLayout(cards);

        panel1 = new JPanel(null);
        createPanel1(panel1);
        this.add(panel1, "panel1");

        panel2 = new JPanel(null);
        createPanel2(panel2);
        this.add(panel2, "panel2");

        panel3 = new JPanel(null);
        createPanel3(panel3);
        this.add(panel3, "pp");

        cards.show(this, "panel1");
    }

public class ProgressPanel {
    private static JPanel panel;
    private static JProgressBar progressBar;
    private static int progress;

    public static JPanel createProgressPanel(){
        ProgressPanel.panel = new JPanel(null);
        ProgressPanel.initPanel();
        return ProgressPanel.panel;
    }

    private static void initPanel(){
        panel.setLayout(new GridBagLayout());
        GridBagConstraints c = new GridBagConstraints();

        progressBar = new JProgressBar(0, 100);
        progressBar.setValue(progress);
        progressBar.setStringPainted(true);
        panel.add(progressBar, c);
    }

    public static void updateProgress(int x){
        ProgressPanel.progress += x;
    }

    public void resetProgress(){
        this.progress = 0;
    }
}

1 个解决方案