java - GUI框架很大，与我的java设计不符

Question

很抱歉这个蹩脚的标题，想不出更好的措辞方式。基本上，我正在学习 Java 中的 GUI 并使用 NetBeans，但我遇到了一个无法搜索的问题，而且我的 google fu 失败了。基本上，当我设计一个新窗口时，我可以完全按照我想要的方式得到它

然后当我去运行它时，它变得很大但它没有最大化，只是一个巨大的框架

我尝试过操纵听起来好像有帮助的属性，但没有运气。有人可以提供一些建议吗？预先感谢!

编辑:想补充一点，这不是特定于该程序的，它与我尝试制作的任何 GUI 一起使用，让我相信这是 Netbeans 中的某些设置，我无法找到答案。

这是 GUI 代码:

private void initComponents() {

    jLabel1 = new javax.swing.JLabel();
    jLabel2 = new javax.swing.JLabel();
    jLabel3 = new javax.swing.JLabel();
    jLabel4 = new javax.swing.JLabel();
    jLabel5 = new javax.swing.JLabel();
    calculateButton = new javax.swing.JButton();
    exitButton = new javax.swing.JButton();
    customerTypeTxt = new javax.swing.JTextField();
    subtotalTxt = new javax.swing.JTextField();
    discountPercentTxt = new javax.swing.JTextField();
    discountAmountTxt = new javax.swing.JTextField();
    totalTxt = new javax.swing.JTextField();

    setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

    jLabel1.setText("Customer Type:");

    jLabel2.setText("Subtotal:");

    jLabel3.setText("Discount Percent:");

    jLabel4.setText("Discount Amount:");

    jLabel5.setText("Total:");

    calculateButton.setText("Calculate");
    calculateButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            calculateButtonActionPerformed(evt);
        }
    });

    exitButton.setText("Exit");
    exitButton.addActionListener(new java.awt.event.ActionListener() {
        public void actionPerformed(java.awt.event.ActionEvent evt) {
            exitButtonActionPerformed(evt);
        }
    });

    discountPercentTxt.setEditable(false);
    discountPercentTxt.setFocusable(false);

    discountAmountTxt.setEditable(false);
    discountAmountTxt.setFocusable(false);

    totalTxt.setEditable(false);
    totalTxt.setFocusable(false);

    javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
    getContentPane().setLayout(layout);
    layout.setHorizontalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel4)
                            .addComponent(jLabel5))
                        .addGap(25, 25, 25)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(discountAmountTxt)
                            .addComponent(totalTxt, javax.swing.GroupLayout.DEFAULT_SIZE, 108, Short.MAX_VALUE)))
                    .addGroup(layout.createSequentialGroup()
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                            .addComponent(jLabel1)
                            .addComponent(jLabel2)
                            .addComponent(jLabel3))
                        .addGap(25, 25, 25)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addComponent(discountPercentTxt, javax.swing.GroupLayout.DEFAULT_SIZE, 108, Short.MAX_VALUE)
                            .addComponent(subtotalTxt)
                            .addComponent(customerTypeTxt))))
                .addGroup(layout.createSequentialGroup()
                    .addComponent(calculateButton, javax.swing.GroupLayout.PREFERRED_SIZE, 95, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                    .addComponent(exitButton)))
            .addGap(18, 18, 18))
    );
    layout.setVerticalGroup(
        layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
        .addGroup(layout.createSequentialGroup()
            .addGap(21, 21, 21)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel1)
                .addComponent(customerTypeTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(18, 18, 18)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel2)
                .addComponent(subtotalTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(18, 18, 18)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel3)
                .addComponent(discountPercentTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(18, 18, 18)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel4)
                .addComponent(discountAmountTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(21, 21, 21)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(jLabel5)
                .addComponent(totalTxt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
            .addGap(18, 18, 18)
            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                .addComponent(calculateButton)
                .addComponent(exitButton))
            .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
    );

    pack();
}// </editor-fold>    

以及更多请求的代码:

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(InvoiceForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (InstantiationException ex) {
        java.util.logging.Logger.getLogger(InvoiceForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (IllegalAccessException ex) {
        java.util.logging.Logger.getLogger(InvoiceForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    } catch (javax.swing.UnsupportedLookAndFeelException ex) {
        java.util.logging.Logger.getLogger(InvoiceForm.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
    }
    //</editor-fold>

    /* Create and display the form */
    java.awt.EventQueue.invokeLater(new Runnable() {
        public void run() {
            new InvoiceForm().setVisible(true);
        }
    });
}

Answer 1

如果我是您，我会忘记 NetBeans 设计器，并使用 DesignGridLayout 编写 GUI 代码;只需替换以下行(包括)之间的所有代码块:

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());

以及以下行(排除，必须保留):

pack();

使用以下代码块:

DesignGridlLayout layout = new DesignGridLayout(getContentPane());
layout.row().grid(jLabel1).add(customerTypeTxt);
layout.row().grid(jLabel2).add(subtotalTxt);
layout.row().grid(jLabel3).add(discountPercentTxt);
layout.row().grid(jLabel4).add(discountAmountTxt);
layout.row().grid(jLabel5).add(totalTxt);
layout.emptyRow();
layout.row().center().add(calculateButton, exitButton);

您应该得到您想要的 UI，并且放大应该按预期工作。

不要为 DesignGridLayout 寻找图形设计器，您将找不到任何图形设计器，因为这是一个可通过编码直接使用的布局管理器，并且使用它进行编码非常简单。