Question

一旦标签中的文字发生变化，我的摇摆标签就会弄乱我的布局代码：

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package question3_test;

/**
 *
 * @author jackandjill
 */
public class GUI extends javax.swing.JFrame {

    /**
     * Creates new form GUI
     */
    public GUI() {
        initComponents();
    }

    /**
     * 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() {

        jPanel1 = new javax.swing.JPanel();
        title_lbl = new java.awt.Label();
        side1_lbl = new javax.swing.JLabel();
        jLabel2 = new javax.swing.JLabel();
        jLabel3 = new javax.swing.JLabel();
        side1_tf = new javax.swing.JTextField();
        side2_tf = new javax.swing.JTextField();
        side3_tf = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        result_lbl = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setMinimumSize(new java.awt.Dimension(200, 100));

        jPanel1.setMaximumSize(new java.awt.Dimension(200, 200));

        title_lbl.setFont(new java.awt.Font("Arial", 1, 18)); // NOI18N
        title_lbl.setText("AREA OF TRIANGLE");

        side1_lbl.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
        side1_lbl.setLabelFor(side1_tf);
        side1_lbl.setText("Side 1:");

        jLabel2.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
        jLabel2.setLabelFor(side2_tf);
        jLabel2.setText("Side 2:");

        jLabel3.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
        jLabel3.setLabelFor(side3_tf);
        jLabel3.setText("Side 3:");

        side1_tf.setColumns(6);
        side1_tf.setMinimumSize(new java.awt.Dimension(60, 20));

        side2_tf.setColumns(6);
        side2_tf.setMinimumSize(new java.awt.Dimension(60, 20));

        side3_tf.setColumns(6);
        side3_tf.setMinimumSize(new java.awt.Dimension(60, 20));

        jButton1.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
        jButton1.setText("Calculate Area");
        jButton1.setBorder(null);
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        result_lbl.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        result_lbl.setText("jLabel4");

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                .addContainerGap(25, Short.MAX_VALUE)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(33, 33, 33)
                        .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addComponent(side1_lbl)
                                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                                .addComponent(side1_tf, javax.swing.GroupLayout.DEFAULT_SIZE, 60, Short.MAX_VALUE))
                            .addGroup(jPanel1Layout.createSequentialGroup()
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
                                        .addComponent(jLabel2)
                                        .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED))
                                    .addGroup(jPanel1Layout.createSequentialGroup()
                                        .addComponent(jLabel3)
                                        .addGap(10, 10, 10)))
                                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                                    .addComponent(side3_tf, javax.swing.GroupLayout.DEFAULT_SIZE, 60, Short.MAX_VALUE)
                                    .addComponent(side2_tf, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)))))
                    .addComponent(title_lbl, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addGroup(jPanel1Layout.createSequentialGroup()
                        .addGap(17, 17, 17)
                        .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 132, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGap(30, 30, 30))
            .addComponent(result_lbl, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addComponent(title_lbl, javax.swing.GroupLayout.PREFERRED_SIZE, 44, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(side1_lbl)
                    .addComponent(side1_tf, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel2)
                    .addComponent(side2_tf, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jLabel3)
                    .addComponent(side3_tf, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(18, 18, 18)
                .addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 31, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(result_lbl)
                .addGap(0, 21, Short.MAX_VALUE))
        );

        title_lbl.getAccessibleContext().setAccessibleName("Area of Triangle");

        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(37, Short.MAX_VALUE)
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(25, Short.MAX_VALUE))
        );

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

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        result_lbl.setText("This is getting longer,This is getting longer,This is getting longer");
    }

    /**
     * @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(GUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(GUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(GUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(GUI.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 GUI().setVisible(true);
            }
        });
    }
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JLabel jLabel3;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JLabel result_lbl;
    private javax.swing.JLabel side1_lbl;
    private javax.swing.JTextField side1_tf;
    private javax.swing.JTextField side2_tf;
    private javax.swing.JTextField side3_tf;
    private java.awt.Label title_lbl;
    // End of variables declaration
}

所以，当我运行这个时，我得到了这个

enter image description here

然后在我按下计算区域按钮后，我得到了这个

enter image description here

与另一个应用程序有类似的问题，问了一个问题here 并且我被告知要设置一个固定的列大小，这也是，但仍然是相同的效果。

Answer 1

请勿尝试使用GroupLayout或GUI编辑器来撰写整个应用程序。相反，在CENTER的{{1}}中使用此GroupPanel之类的内容。将BorderLayout添加到JLabel，将NORTH添加到ControlPanel。 SOUTH中的JTextArea适用于包装附加文字。

Answer 2

您可以使用html来创建多行标签。只需稍微拉伸你的jlabel宽度即可。在你的情况下试试这个

mylabel.setText("<html>This is getting longer  <br> This is getting longer <br>This is getting longer</html>");

下载截图

enter image description here

Answer 3

我不知道你正在使用什么样的构建工具，我不使用它，所以我不能给你具体的指示。我认为这是一个教科书案例，表明在不了解它的作用的情况下使用这种工具的危险，虽然你可能（或可能不）能够用我的建议修复它，但我预测你会不断有这个和更糟的问题，如果你不明白这个工具在封面下做了什么。

似乎UI屏幕上的所有水平结构都以某种方式正确对齐自己;甚至在您单击按钮之前，如果您扩展UI屏幕，则所有字段都会向右移动。我不知道为什么会这样;也许你已经将组字段设置为Alignment.TRAILING。

作为快速修复，您可以尝试将结果字段移动到与其他字段不同的面板，这样即使它变长，也是唯一被截断的面板。我不知道如何在GUI构建器中执行此操作，并且它并未真正解决整个问题。但它可以让你超越底部字段中的长字符串将所有内容向右移动的点。

祝你好运。

Swing标签未对齐文本字段

3 个答案: