一段时间以来，我一直在寻找答案。什么 我想做的是我的组合框显示3个项目：
每个都有各自的表，所以如果我的组合框
向学生显示他们在JTable中显示学生表，依此类推。
答案 0 :(得分：0)
您可以通过以下示例获取帮助。它可以满足您的需求。尽管这不是一种完美的方法，但我仅作了几处更改以显示其工作原理。
享受：）
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.AbstractTableModel;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URL;
public class TableWithComboBox extends JPanel implements ActionListener {
private boolean DEBUG = true;
JPanel jPanel2;
JFrame frame;
JTable table;
JComboBox comboBox;
public TableWithComboBox() {
super(new GridLayout(2, 0));
table = new JTable(new MyTableModel());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
// Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table);
// Add the scroll pane to this panel.
String[] options = { "Students", "Doctor" };
comboBox = new JComboBox(options);
comboBox.setSelectedIndex(0);
comboBox.addActionListener(this);
add(comboBox);
add(scrollPane);
}
public void actionPerformed(ActionEvent e) {
JComboBox cb = (JComboBox) e.getSource();
String optionName = (String) cb.getSelectedItem();
if (optionName.equals("Doctor")) {
table.setModel(new MyTableDoctorModel());
} else {
table.setModel(new MyTableModel());
}
}
class MyTableDoctorModel extends AbstractTableModel {
String[] columnNames = { "Name", "Department", "Hospital", "Experience" };
Object[][] data = { { "Saira", "Dep1", "XYZ", new Integer(3) },
{ "Saira", "Dep1", "XYZ", new Integer(3) },
{ "Saira", "Dep1", "XYZ", new Integer(3) },
{ "Saira", "Dep1", "XYZ", new Integer(3) },
};
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return data.length;
}
public String getColumnName(int col) {
return columnNames[col];
}
public Object getValueAt(int row, int col) {
return data[row][col];
}
/*
* JTable uses this method to determine the default renderer/ editor for
* each cell. If we didn't implement this method, then the last column
* would contain text ("true"/"false"), rather than a check box.
*/
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
/*
* Don't need to implement this method unless your table's editable.
*/
public boolean isCellEditable(int row, int col) {
// Note that the data/cell address is constant,
// no matter where the cell appears onscreen.
if (col < 1) {
return false;
} else {
return true;
}
}
/*
* Don't need to implement this method unless your table's data can
* change.
*/
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value + " (an instance of "
+ value.getClass() + ")");
}
data[row][col] = value;
double totalVal = 100.0 + Double.parseDouble(String.valueOf(table
.getValueAt(0, 4)));
fireTableCellUpdated(row, col);
}
}
class MyTableModel extends AbstractTableModel {
String[] columnNames = { "Name", "Degree", "Board/University",
"Year of Passing", "CGPA", "Part-Time" };
Object[][] data = {
{ "Saira", "B.Tech", "VTU", new Integer(2015), new Float(8.33),
new Boolean(false) },
{ "Smaira", "B.Sc", "CBSE", new Integer(2007), new Float(7.77),
new Boolean(true) },
{ "John", "M.tech", "IIT", new Integer(2009), new Float(8.77),
new Boolean(false) },
{ "Jia", "M.Sc", "Thapar", new Integer(2011), new Float(7.21),
new Boolean(true) },
{ "Kerry", "B.Com", "DU", new Integer(2014), new Float(8.92),
new Boolean(false) }
};
public int getColumnCount() {
return columnNames.length;
}
public int getRowCount() {
return data.length;
}
public String getColumnName(int col) {
return columnNames[col];
}
public Object getValueAt(int row, int col) {
return data[row][col];
}
/*
* JTable uses this method to determine the default renderer/ editor for
* each cell. If we didn't implement this method, then the last column
* would contain text ("true"/"false"), rather than a check box.
*/
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
/*
* Don't need to implement this method unless your table's editable.
*/
public boolean isCellEditable(int row, int col) {
// Note that the data/cell address is constant,
// no matter where the cell appears onscreen.
if (col < 1) {
return false;
} else {
return true;
}
}
/*
* Don't need to implement this method unless your table's data can
* change.
*/
public void setValueAt(Object value, int row, int col) {
if (DEBUG) {
System.out.println("Setting value at " + row + "," + col
+ " to " + value + " (an instance of "
+ value.getClass() + ")");
}
data[row][col] = value;
double totalVal = 100.0 + Double.parseDouble(String.valueOf(table
.getValueAt(0, 4)));
if (DEBUG) {
System.out.println("New value of data:");
printDebugData();
}
}
private void printDebugData() {
int numRows = getRowCount();
int numCols = getColumnCount();
for (int i = 0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j = 0; j < numCols; j++) {
System.out.print(" " + data[i][j]);
}
System.out.println();
}
System.out.println("--------------------------");
}
}
/**
* Create the GUI and show it. For thread safety, this method should be
* invoked from the event-dispatching thread.
*/
private void createAndShowGUI(TableWithComboBox newContentPane) {
// Create and set up the window.
frame = new JFrame("TableDemo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new FlowLayout());
jPanel2 = new JPanel();
frame.add(jPanel2);
// Create and set up the content pane.
frame.add(newContentPane);
// newContentPane.setOpaque(true); //content panes must be opaque
// frame.setContentPane(newContentPane);
// Display the window.
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
// Schedule a job for the event-dispatching thread:
// creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
TableWithComboBox newContentPane = new TableWithComboBox();
newContentPane.createAndShowGUI(newContentPane);
}
});
}
}