将 JFrame(不带布局)更改为 JPanel

Question

我必须更改在 Swing 中实现的程序 GUI。现在我在单独的窗口中有许多图表，我想更改它，以便它们都只显示在一个图表中。原始版本的收缩是JFrame有一个JPanel字段。JFrame没有固定的布局。

private void initComponents() {// GEN-BEGIN:initComponents
        getContentPane().setLayout(null);
        setTitle("Wykres");
        addComponentListener(new java.awt.event.ComponentAdapter() {
            public void componentResized(java.awt.event.ComponentEvent evt) {
                resizedWindow(evt);
            }
        });
        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
            }
        });
        java.awt.Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();
        setBounds((screenSize.width - MIN_WIDTH) / 2, (screenSize.height - MIN_HEIGHT) / 2, MIN_WIDTH, MIN_HEIGHT);
    }

JPanel声明如下：

BorderLayout borderLayout = new BorderLayout();
            borderLayout.setHgap(0);
            borderLayout.setVgap(0);
            drawPanel = new JDrawPanel();
            drawPanel.setLayout(borderLayout);
            drawPanel.setComponentOrientation(ComponentOrientation.UNKNOWN);
setContentPane(drawPanel);

如果我删除 JFrame 的继承并添加 JPanel 的继承，则不会调用方法 paintComponent。我认为原因是布局设置不好。但是程序计算与边缘的距离，我不想更改它。如何轻松编辑此程序？

我还在 NETBEANS 中生成了新的 GUI

public class ViewPanel extends javax.swing.JFrame {
    public ViewPanel() {
       // initComponents();
    }
    public ViewPanel(JPanel histo, JPanel dystrybu, JPanel time){
        initComponents(histo, dystrybu, time);
    }
    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents(JPanel histo, JPanel dystrybu, JPanel time) {
        MainTabs = new javax.swing.JTabbedPane();
        jHistoTab = histo;
        jDystybuTab = dystrybu;
        jTimeTab = time;

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setTitle("zaleznosc czasowa");
        MainTabs.setToolTipText("");
        MainTabs.addTab("histogram", jHistoTab);
        MainTabs.addTab("dystrybuanta", jDystybuTab);
        MainTabs.addTab("zalenosc czasowa", jTimeTab);
        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(MainTabs, javax.swing.GroupLayout.DEFAULT_SIZE, 712, Short.MAX_VALUE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(MainTabs, javax.swing.GroupLayout.DEFAULT_SIZE, 363, Short.MAX_VALUE)
                .addContainerGap())
        );
        MainTabs.getAccessibleContext().setAccessibleName("");

        pack();
    }// </editor-fold>                        
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(ViewPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(ViewPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(ViewPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(ViewPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
        //</editor-fold>
        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ViewPanel().setVisible(true);
                AppSMO.main(null);
            }
        });
    }
    public void setHistoTab(JPanel panel){
        jHistoTab=panel;
    }
    // Variables declaration - do not modify                     
    private javax.swing.JTabbedPane MainTabs;
    private JPanel jDystybuTab;
    private JPanel jHistoTab;
    private JPanel jTimeTab;
    // End of variables declaration                   
}

Answer 1

将边框布局设置为内容窗格。将面板添加到内容窗格。这将给它中心约束，以便它适应窗口的大小。在面板中，您可以自由添加所需的任何组件。我建议您不要在任何地方使用空布局。避免绝对定位。