问题
I'm using Netbeans GUI Builder to create a GUI app (so all the code generated is by Netbeans).
Everything looks fine in the Preview Design, but when I run the app, the JScrollPane displays badly...
...as you can see, only half of the scrollbar is visible.
I have tried manually setting the JScrollBar for the JScrollPane, using my own method:
jScrollPane1.setVerticalScrollBar(getScrollBarForScrollPane());
But that gives this result...
Maybe there is some property on the JScrollBar or JScrollPane that I need to change?
I have been researching this for ages, so am hoping someone has some suggestions! :)
Here is my entire code...
package uk.co.mobilewebexpert.myappmonitor;
import javax.swing.ImageIcon;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
public class MyAppMonitorJFrame extends javax.swing.JFrame {
private final ImageIcon greenIcon = new ImageIcon(getClass().getResource("/green_light.jpg"));
private final ImageIcon amberIcon = new ImageIcon(getClass().getResource("/amber_light.jpg"));
private final ImageIcon redIcon = new ImageIcon(getClass().getResource("/red_light.jpg"));
/**
* Creates new form MyAppMonitorJFrame
*/
public MyAppMonitorJFrame() {
initComponents();
DefaultTableCellRenderer rightRenderer = new DefaultTableCellRenderer();
rightRenderer.setHorizontalAlignment(DefaultTableCellRenderer.CENTER);
rightRenderer.setFont(new java.awt.Font("Tahoma", 1, 21));
for (int i = 0; i < jTable1.getColumnCount(); i++) {
jTable1.getColumn(jTable1.getColumnName(i)).setHeaderRenderer(rightRenderer);
jTable1.getColumn(jTable1.getColumnName(i)).setCellRenderer(rightRenderer);
}
//jTable1.getTableHeader().setFont(new java.awt.Font("Tahoma", 1, 11));
DefaultTableModel tableModel = (DefaultTableModel) jTable1.getModel();
tableModel.addRow(new Object[]{greenIcon, "2", "3", "4", "5", "6", "7"});
jScrollPane1.setInsets
}
/**
* 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();
jLabel6 = new javax.swing.JLabel();
jLabel7 = new javax.swing.JLabel();
jLabel8 = new javax.swing.JLabel();
jLabel9 = new javax.swing.JLabel();
jLabel10 = new javax.swing.JLabel();
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();
jPanel3 = new javax.swing.JPanel();
jLabel11 = new javax.swing.JLabel();
jTextField1 = new javax.swing.JTextField();
jButton1 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable();
jScrollPane2 = new javax.swing.JScrollPane();
jTextPane1 = new javax.swing.JTextPane();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("MYOB");
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Status Summary", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 1, 12))); // NOI18N
jLabel6.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel6.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel6.setText("Total");
jLabel6.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jLabel7.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel7.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel7.setIcon(new javax.swing.ImageIcon(getClass().getResource("/green_light_2.jpg"))); // NOI18N
jLabel7.setText("Online");
jLabel7.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);
jLabel8.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel8.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel8.setIcon(new javax.swing.ImageIcon(getClass().getResource("/amber_light_2.jpg"))); // NOI18N
jLabel8.setText("Suspect");
jLabel8.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);
jLabel9.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel9.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel9.setIcon(new javax.swing.ImageIcon(getClass().getResource("/red_light_2.jpg"))); // NOI18N
jLabel9.setText("Offline");
jLabel9.setHorizontalTextPosition(javax.swing.SwingConstants.RIGHT);
jLabel10.setFont(new java.awt.Font("Tahoma", 1, 11)); // NOI18N
jLabel10.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel10.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel1.setText("?");
jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel2.setText("?");
jLabel3.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel3.setText("?");
jLabel4.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
jLabel4.setText("?");
jLabel5.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel6, javax.swing.GroupLayout.DEFAULT_SIZE, 34, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel7, javax.swing.GroupLayout.DEFAULT_SIZE, 59, Short.MAX_VALUE)
.addComponent(jLabel2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel8, javax.swing.GroupLayout.DEFAULT_SIZE, 69, Short.MAX_VALUE)
.addComponent(jLabel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel9, javax.swing.GroupLayout.DEFAULT_SIZE, 60, Short.MAX_VALUE)
.addComponent(jLabel4, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel10, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel5, javax.swing.GroupLayout.DEFAULT_SIZE, 10, Short.MAX_VALUE))
.addContainerGap()));
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel6)
.addComponent(jLabel7)
.addComponent(jLabel8)
.addComponent(jLabel9)
.addComponent(jLabel10))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel1)
.addComponent(jLabel2)
.addComponent(jLabel3)
.addComponent(jLabel4)
.addComponent(jLabel5))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)));
jPanel3.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Search", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 1, 12))); // NOI18N
jLabel11.setText("Enter device serial number");
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});
jButton1.setText("Go");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap()
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(jLabel11)
.addGap(0, 0, Short.MAX_VALUE))
.addGroup(jPanel3Layout.createSequentialGroup()
.addComponent(jTextField1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jButton1)))
.addContainerGap()));
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jLabel11)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jButton1))));
jScrollPane1.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Device Details", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 1, 12))); // NOI18N
jScrollPane1.setVerticalScrollBar(getScrollBarForScrollPane());
jTable1.setBackground(new java.awt.Color(254, 254, 254));
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object[][]{
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null},
{null, null, null, null, null, null}
},
new String[]{
"Serial Number", "Device Name", "Status", "Current Uptime", "Current Downtime", "Last Known Uptime"
}));
jTable1.setGridColor(new java.awt.Color(254, 254, 254));
jTable1.setShowHorizontalLines(false);
jTable1.setShowVerticalLines(false);
jScrollPane1.setViewportView(jTable1);
jScrollPane2.setBorder(javax.swing.BorderFactory.createTitledBorder(null, "Log", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("Tahoma", 1, 12))); // NOI18N
jScrollPane2.setViewportView(jTextPane1);
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()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addComponent(jScrollPane2))
.addContainerGap()));
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addComponent(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel3, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane2, javax.swing.GroupLayout.DEFAULT_SIZE, 328, Short.MAX_VALUE)
.addContainerGap()));
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
}
/**
* @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(MyAppMonitorJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MyAppMonitorJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MyAppMonitorJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MyAppMonitorJFrame.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 MyAppMonitorJFrame().setVisible(true);
}
});
}
public javax.swing.JScrollBar getScrollBarForScrollPane() {
int width = 50; //set extremely large to exaggerate the issue
javax.swing.JScrollBar jScrollBar = new javax.swing.JScrollBar(javax.swing.JScrollBar.VERTICAL);
jScrollBar.setPreferredSize(new java.awt.Dimension(width, Integer.MAX_VALUE));
return jScrollBar;
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel10;
private javax.swing.JLabel jLabel11;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JLabel jLabel4;
private javax.swing.JLabel jLabel5;
private javax.swing.JLabel jLabel6;
private javax.swing.JLabel jLabel7;
private javax.swing.JLabel jLabel8;
private javax.swing.JLabel jLabel9;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel3;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JTable jTable1;
private javax.swing.JTextField jTextField1;
private javax.swing.JTextPane jTextPane1;
// End of variables declaration
}
回答1:
As you can see in this snapshot from the reference, your scroll bar is perfect:
回答2:
Swing GUI is correctly builded, meaning methods and code generated by GUI_Builer :-),
one of issues is generated from code line
tableModel.addRow(new Object[]{greenIcon, "2", "3", "4", "5", "6", "7"});you added a new row to the
JTable, to the Swing GUI, after is calledpack()last code linepack();ininitComponents();,but major issue is that
PreferredSizeis calculated internally from code line.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 0, Short.MAX_VALUE), then override this size by using quite proper methodjTable1.setPreferredScrollableViewportSize(jTable1.getPreferredSize());is quite pretty ignoredwrite this code by hand
来源：https://stackoverflow.com/questions/15143902/jscrollpane-vertical-scrollbar-too-wide