Swing标签未对齐文本字段
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
然后在我按下计算区域按钮后，我得到了这个
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。
3 个答案:
答案 0 :(得分：2)
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。
答案 1 :(得分：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
答案 2 :(得分：1)
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。
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