星期一早上我在哪里，这意味着我要在Java Swing失败了！但是严肃地说，我无法弄清楚为什么我的动态创建的JTable一旦添加到JFrame上的JPanel就拒绝显示自己，并且非常感谢有任何帮助来隔离这个麻烦的问题。正如你从代码中看到的那样，我已经调用了十几个不同的方法，但似乎无法找到合适的方法来展示它......也许我错过了一个？
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package energizingemerald;
import javax.swing.*;
import java.awt.Dimension;
/**
*
* @author Ryan
*/
public class SectionManagerFrame extends javax.swing.JFrame {
/**
* Creates new form SectionManagerFrame
*/
public SectionManagerFrame() {
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() {
jButton_Cancel = new javax.swing.JButton();
jButton_OK = new javax.swing.JButton();
jLabel_Title = new javax.swing.JLabel();
jLabel_Description = new javax.swing.JLabel();
jTextField_Title = new javax.swing.JTextField();
jScrollPane2 = new javax.swing.JScrollPane();
jTextArea_Description = new javax.swing.JTextArea();
jButton_Remove = new javax.swing.JButton();
jButton_Add = new javax.swing.JButton();
jButton_Edit = new javax.swing.JButton();
jPanel_Grid = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowOpened(java.awt.event.WindowEvent evt) {
formWindowOpened(evt);
}
});
jButton_Cancel.setText("Cancel");
jButton_Cancel.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton_CancelMouseClicked(evt);
}
});
jButton_OK.setText("OK");
jButton_OK.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
jButton_OKMouseClicked(evt);
}
});
jLabel_Title.setText("Review Title:");
jLabel_Description.setText("Review Description:");
jTextArea_Description.setColumns(20);
jTextArea_Description.setRows(5);
jScrollPane2.setViewportView(jTextArea_Description);
jButton_Remove.setText("Remove");
jButton_Add.setText("Add");
jButton_Edit.setText("Edit");
javax.swing.GroupLayout jPanel_GridLayout = new javax.swing.GroupLayout(jPanel_Grid);
jPanel_Grid.setLayout(jPanel_GridLayout);
jPanel_GridLayout.setHorizontalGroup(
jPanel_GridLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 0, Short.MAX_VALUE)
);
jPanel_GridLayout.setVerticalGroup(
jPanel_GridLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 268, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(122, 122, 122)
.addComponent(jButton_Cancel)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton_OK)
.addGap(0, 0, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jPanel_Grid, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGap(18, 18, 18)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jButton_Remove, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton_Add, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton_Edit, javax.swing.GroupLayout.PREFERRED_SIZE, 71, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel_Description)
.addComponent(jLabel_Title))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jTextField_Title))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 587, Short.MAX_VALUE)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel_Title)
.addComponent(jTextField_Title, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jLabel_Description)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 196, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jButton_Add)
.addGap(3, 3, 3)
.addComponent(jButton_Edit)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton_Remove))
.addComponent(jPanel_Grid, 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(jButton_Cancel)
.addComponent(jButton_OK))
.addContainerGap())
);
pack();
}// </editor-fold>
private void jButton_CancelMouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
this.setVisible(false);
this.dispose();
}
private void jButton_OKMouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
}
private void formWindowOpened(java.awt.event.WindowEvent evt) {
// TODO add your handling code here:
//ManagerDataModel newManagerDataModel = new ManagerDataModel();
/*
newManagerDataModel.AddColumn("Section Name");
newManagerDataModel.AddColumn("Section Type");
newManagerDataModel.AddColumn("# of Particles");
newManagerDataModel.AddRow(new String[]{"Test","Test","Test"});
*/
jTable_Sections = new JTable(5, 5);
//jTable_Sections.setPreferredScrollableViewportSize(new Dimension(500, 500));
jTable_Sections.setMinimumSize(new Dimension(200, 200));
jTable_Sections.setFillsViewportHeight(true);
jScrollPane_Sections = new JScrollPane(jTable_Sections);
jScrollPane_Sections.setMinimumSize(new Dimension(200, 200));
jPanel_Grid.add(jTable_Sections);
jPanel_Grid.add(jScrollPane_Sections);
jPanel_Grid.validate();
jPanel_Grid.repaint();
this.validate();
this.pack();
this.repaint();
}
private JTable jTable_Sections;
private JScrollPane jScrollPane_Sections;
/**
* @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(SectionManagerFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(SectionManagerFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(SectionManagerFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(SectionManagerFrame.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 SectionManagerFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton_Add;
private javax.swing.JButton jButton_Cancel;
private javax.swing.JButton jButton_Edit;
private javax.swing.JButton jButton_OK;
private javax.swing.JButton jButton_Remove;
private javax.swing.JLabel jLabel_Description;
private javax.swing.JLabel jLabel_Title;
private javax.swing.JPanel jPanel_Grid;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTextArea jTextArea_Description;
private javax.swing.JTextField jTextField_Title;
// End of variables declaration
}
答案 0 :(得分：4)
不是GroupLayout的粉丝，但是很容易解决这个问题
不要使用private void formWindowOpened(java.awt.event.WindowEvent evt) {将JComponents添加到已经可见的容器中，因为使用Swing GUI调整大小并闪烁
必须在两个方向上覆盖Min，Max和PreferredSize，否则将被忽略（默认情况下，请参阅生成的代码）
JPanel在API中实现了FlowLayout，然后包含在JScollPane中的JTable在GroupLayout中丢失（确定必须有解决方案）可能与setMin，Max和PreferredSize一起出现问题
必需的代码（不要用下一点解决问题）
private void formWindowOpened(java.awt.event.WindowEvent evt) {
jTable_Sections = new JTable(5, 5);
jTable_Sections.setFillsViewportHeight(true);
jScrollPane_Sections = new JScrollPane(jTable_Sections);
jPanel_Grid.setLayout(new BorderLayout());
jPanel_Grid.add(jScrollPane_Sections);
this.validate();
this.repaint();
this.pack();
}