Swing Ui倍增面板重影

在我的平台上运行时,您的代码不会显示上面显示的任何故障.

确认您没有绘画问题,例如忽略此处super.paintComponent()讨论的内容.

请确认您有没有驱动程序不兼容,如讨论在这里.

构造和修改事件派发线程上的所有GUI对象.

不要使用set[Preferred|Maximum|Minimum]Size(),当你真的要覆盖get[Preferred|Maximum|Minimum]Size(),为讨论在这里.下面的示例覆盖getPreferredSize()滚动窗格,但可以实现Scrollable,如讨论在这里.

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.GridLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;

/** @see /sf/ask/17360801/ */
public class MainFrame {

    private static final int H = 64;

    public static void main(String[] args) {
        EventQueue.invokeLater(() -> new MainFrame());
    }

    public MainFrame() {
        JFrame frame = new JFrame("LOL");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JTabbedPane tabbedPane = new JTabbedPane();
        JPanel panel = new JPanel(new GridLayout(0, 1, 5, 5));
        for (int i = 0; i < 8; i++) {
            panel.add(new DownloadPanel());
        }
        JScrollPane jsp = new JScrollPane(panel) {
            @Override
            public Dimension getPreferredSize() {
                return new Dimension(6 * H, 4 * H);
            }
        };
        tabbedPane.addTab("Download", null, jsp, "Main Download Window.");
        tabbedPane.addTab("Options", null, null, "Options");
        frame.add(tabbedPane);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    private static class DownloadPanel extends JPanel {

        JPanel jobPanel = new JPanel();

        public DownloadPanel() {
            this.setLayout(new BorderLayout());
            this.setBackground(Color.lightGray);
            JProgressBar jpb = new JProgressBar();
            jpb.setIndeterminate(true);
            this.add(jpb);
            JPanel buttonPane = new JPanel();
            JButton toggleTorConnectionButton = new JButton("Button");
            toggleTorConnectionButton.setToolTipText("Toggles Tor Connection.");
            buttonPane.add(toggleTorConnectionButton);
            this.add(buttonPane, BorderLayout.WEST);
        }

        @Override
        public Dimension getPreferredSize() {
            return new Dimension(4 * H, H);
        }
    }
}