这个是sun提供的例子
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
public class TableDemo extends JFrame {
private boolean DEBUG = true; public TableDemo() {
super("TableDemo"); MyTableModel myModel = new MyTableModel();
JTable table = new JTable(myModel);
table.setPreferredScrollableViewportSize(new Dimension(500, 70)); //Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table); //Add the scroll pane to this window.
getContentPane().add(scrollPane, BorderLayout.CENTER); addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
} class MyTableModel extends AbstractTableModel {
final String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Chasing toddlers", new Integer(2), new Boolean(false)},
{"Mark", "Andrews",
"Speed reading", new Integer(20), new Boolean(true)},
{"Angela", "Lih",
"Teaching high school", new Integer(4), 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 < 2) {
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() + ")");
} if (data[0][col] instanceof Integer) {
//If we don't do something like this, the column
//switches to contain Strings.
//XXX: See TableEditDemo.java for a better solution!!!
try {
data[row][col] = new Integer((String)value);
} catch (NumberFormatException e) {
if (SwingUtilities.isEventDispatchThread()) {
JOptionPane.showMessageDialog(TableDemo.this,
"The \"" + getColumnName(col)
+ "\" column accepts only integer values.");
} else {
System.err.println("User attempted to enter non-integer"
+ " value (" + value
+ ") into an integer-only column.");
}
}
} else {
data[row][col] = value;
} 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("--------------------------");
}
} public static void main(String[] args) {
TableDemo frame = new TableDemo();
frame.pack();
frame.setVisible(true);
}
}
public class NumberCellRenderer extends DefaultTableCellRenderer{
public NumberCellRenderer(){
setHorizontalAlignment(SwingConstants.RIGHT);
}
}
//然后为JTable中需要设成右对齐的栏位设置该Renderer
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.JScrollPane;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
public class TableDemo extends JFrame {
private boolean DEBUG = true; public TableDemo() {
super("TableDemo"); MyTableModel myModel = new MyTableModel();
JTable table = new JTable(myModel);
table.setPreferredScrollableViewportSize(new Dimension(500, 70)); //Create the scroll pane and add the table to it.
JScrollPane scrollPane = new JScrollPane(table); //Add the scroll pane to this window.
getContentPane().add(scrollPane, BorderLayout.CENTER); addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
} class MyTableModel extends AbstractTableModel {
final String[] columnNames = {"First Name",
"Last Name",
"Sport",
"# of Years",
"Vegetarian"};
final Object[][] data = {
{"Mary", "Campione",
"Snowboarding", new Integer(5), new Boolean(false)},
{"Alison", "Huml",
"Rowing", new Integer(3), new Boolean(true)},
{"Kathy", "Walrath",
"Chasing toddlers", new Integer(2), new Boolean(false)},
{"Mark", "Andrews",
"Speed reading", new Integer(20), new Boolean(true)},
{"Angela", "Lih",
"Teaching high school", new Integer(4), 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 < 2) {
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() + ")");
} if (data[0][col] instanceof Integer) {
//If we don't do something like this, the column
//switches to contain Strings.
//XXX: See TableEditDemo.java for a better solution!!!
try {
data[row][col] = new Integer((String)value);
} catch (NumberFormatException e) {
if (SwingUtilities.isEventDispatchThread()) {
JOptionPane.showMessageDialog(TableDemo.this,
"The \"" + getColumnName(col)
+ "\" column accepts only integer values.");
} else {
System.err.println("User attempted to enter non-integer"
+ " value (" + value
+ ") into an integer-only column.");
}
}
} else {
data[row][col] = value;
} 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("--------------------------");
}
} public static void main(String[] args) {
TableDemo frame = new TableDemo();
frame.pack();
frame.setVisible(true);
}
}
public class NumberCellRenderer extends DefaultTableCellRenderer{
public NumberCellRenderer(){
setHorizontalAlignment(SwingConstants.RIGHT);
}
}
//然后为JTable中需要设成右对齐的栏位设置该Renderer
public NumberCellRenderer(){
setHorizontalAlignment(SwingConstants.RIGHT);
}table.setDefaultRenderer(Number.class, new NumberCellRenderer())
它就是右对齐的
http://www2.gol.com/users/tame/swing/examples/SwingExamples.html
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