在JPanel上显示网格布局

Question

我的任务是在JPAnel上创建选中的板。为此，我试图用带有边框的JPanels填充父级JPanel，但是由于某些原因，代码未给出期望的结果，并且未显示任何错误来调查原因。这是代码：

private static class GlassView extends JFrame {

        private static int width = 600;
        private static int height = 750;

        public GlassView() {
            this.setSize(width, height);
            this.setVisible(true);
            this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        }

        public static void workingFrame() {
            int cols = 0;
            int rows = 0;
            String frameName = "Bot World";

            WorkFrame workF = new WorkFrame(0, 0, frameName);
            wfFrame = workF.newFrame();
            wfFrame.setExtendedState(JFrame.MAXIMIZED_BOTH);
            wfFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            wfFrame.setVisible(true);

            JSplitPane splitPane = new JSplitPane();
            splitPane.setSize(width, height);
            splitPane.setDividerSize(0);
            splitPane.setDividerLocation(150);
            splitPane.setOrientation(JSplitPane.HORIZONTAL_SPLIT);

            JPanel panelLeft = createLftPanel();
            JPanel panelRight = createRightPanel();

            splitPane.setLeftComponent(panelLeft);
            splitPane.setRightComponent(panelRight);
            wfFrame.add(splitPane);
        }
    }

这是需要检查的panelRight的代码：

public static JPanel createRightPanel() {
        JPanel panel = new JPanel();
        int rows = 100;
        int cols = 100;
        panel.setLayout(new GridLayout(rows, cols));
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                JPanel pane = new JPanel();
                pane.add(new JTextField("both"));
                pane.setBorder(BorderFactory.createLineBorder(Color.black));
                panel.add(new JButton(""));
            }
        }
        return panel;
    }

任何帮助将不胜感激。谢谢

Answer 1

[好吧，我的第二个猜测是，在调用]之后，框架没有重新布置>

wfFrame.setVisible(true);
对我来说，下面的例子：

public class Framed {
    public static void workingFrame() {
        JFrame frame = new JFrame();
        frame.setExtendedState(JFrame.MAXIMIZED_BOTH);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        frame.getContentPane().add(createRightPanel(10, 10));

        frame.revalidate(); // <-- HERE
    }

    public static JPanel createRightPanel(int rows, int cols) {
        JPanel panel = new JPanel(new GridLayout(rows, cols));
        for (int i = 0; i < rows; i++) {
            for (int j = 0; j < cols; j++) {
                JPanel pane = new JPanel();
                pane.setBackground((i+j)%2==0?Color.black:Color.white);
                panel.add(pane);
            }
        }
        return panel;
    }

    public static void main(String... none) throws Exception {
        workingFrame();
    }
}
显示一个检查器网格，但是您是否删除了对它的调用>
        frame.revalidate(); // <-- HERE
然后不显示网格（直到您对框架进行某些操作以使其再次布局为止）。比调用revalidate（）更好的方法是只在添加所有组件之后才调用setVisible。