我正在读取文件,并希望将其输出到jTable进行查看和编辑。当我尝试添加行DefaultTableModel时,由于某种原因,该模型始终为空。任何帮助/方向将不胜感激。谢谢!
public class ReadFileGUI extends javax.swing.JFrame {
public static String file;
private DefaultTableModel model = new DefaultTableModel();
public ReadFileGUI() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
jTable1 = new javax.swing.JTable(model);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("Test");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jScrollPane1.setViewportView(jTable1);
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(14, 14, 14)
.addComponent(jButton1)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGap(0, 0, Short.MAX_VALUE))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 397, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)))
.addContainerGap())
);
layout.setVerticalGroup(
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, 282, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jButton1))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
String line = "Hello~There~This~Is~A~Test";
String datavalue[] = line.split("~");
Vector v = new Vector(Arrays.asList(datavalue));
model.addRow(v);
jTable1.tableChanged(new TableModelEvent(model));
}
public static void main(String args[]) {
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(ReadFileGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(ReadFileGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(ReadFileGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(ReadFileGUI.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new ReadFileGUI().setVisible(true);
}
});
}
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
}
最佳答案
在这里,您的代码的更新版本似乎有效
import javax.swing.event.TableModelEvent;
import javax.swing.table.DefaultTableModel;
import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Arrays;
import java.util.Vector;
public class ReadFileGUI extends javax.swing.JFrame {
private DefaultTableModel tableModel = new DefaultTableModel();
private javax.swing.JButton populateTableButton;
private javax.swing.JScrollPane tableScrollPane;
private javax.swing.JTable table;
public ReadFileGUI() {
initComponents();
setDefaultCloseOperation( javax.swing.WindowConstants.EXIT_ON_CLOSE);
}
@SuppressWarnings("unchecked")
private void initComponents() {
populateTableButton = new javax.swing.JButton();
tableScrollPane = new javax.swing.JScrollPane();
table = new javax.swing.JTable( tableModel );
populateTableButton.setText( "Test" );
populateTableButton.addActionListener( new ActionListener() {
@Override
public void actionPerformed( ActionEvent evt ) {
populateTable();
}
} );
tableScrollPane.setViewportView( table );
getContentPane().setLayout( new BorderLayout( ) );
getContentPane().add( tableScrollPane, BorderLayout.CENTER );
getContentPane().add( populateTableButton, BorderLayout.SOUTH );
pack();
}
private void populateTable( ) {
String line = "Hello~There~This~Is~A~Test";
String dataValue[] = line.split("~");
Vector<String> v = new Vector<>( Arrays.asList( dataValue ));
tableModel.setColumnCount( v.size() );
tableModel.addRow( v );
}
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
new ReadFileGUI().setVisible(true);
}
});
}
}
我改变的事情:
使用导入而不是全名来避免水平滚动条
使用BorderLayout iso生成的布局来缩短代码
重命名了一些变量以提高代码的可读性
删除了
jTable1.tableChanged(new TableModelEvent(model));
调用,因为使用DefaultTableModel
方法时addRow
将触发相应的事件。无需再次在表中指示此更改但是相关的更改是
tableModel.setColumnCount( v.size() );
调用。 DefaultTableModel
的默认构造函数创建一个零列和零行的模型。如果首先设置列数,则可以使用addRow
方法