[java]代码库
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import java.awt.*;
import java.awt.event.*;
public class JTableDemo extends JFrame {
private boolean DEBUG = true;
public JTableDemo() { // 实现构造方法
super("RecorderOfWorkers"); // 首先调用父类JFrame的构造方法生成一个窗口
MyTableModel myModel = new MyTableModel();// myModel存放表格的数据
JTable table = new JTable(myModel);// 表格对象table的数据来源是myModel对象
table.setPreferredScrollableViewportSize(new Dimension(500, 70));// 表格的显示尺寸
// 产生一个带滚动条的面板
JScrollPane scrollPane = new JScrollPane(table);
// 将带滚动条的面板添加入窗口中
getContentPane().add(scrollPane, BorderLayout.CENTER);
addWindowListener(new WindowAdapter() {// 注册窗口监听器
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
// 把要显示在表格中的数据存入字符串数组和Object数组中
class MyTableModel extends AbstractTableModel {
// 表格中第一行所要显示的内容存放在字符串数组columnNames中
final String[] columnNames = { "First Name", "Position", "Telephone",
"MonthlyPay", "Married" };
// 表格中各行的内容保存在二维数组data中
final Object[][] data = {
{ "Wangdong", "Executive", "01068790231", new Integer(5000),
new Boolean(false) },
{ "LiHong", "Secretary", "01069785321", new Integer(3500),
new Boolean(true) },
{ "LiRui", "Manager", "01065498732", new Integer(4500),
new Boolean(false) },
{ "ZhaoXin", "Safeguard", "01062796879", new Integer(2000),
new Boolean(true) },
{ "ChenLei", "Salesman", "01063541298", new Integer(4000),
new Boolean(false) } };
// 下述方法是重写AbstractTableModel中的方法,其主要用途是被JTable对象调用,以便在表格中正确的显示出来。程序员必须根据采用的数据类型加以恰当实现。
// 获得列的数目
public int getColumnCount() {
return columnNames.length;
}
// 获得行的数目
public int getRowCount() {
return data.length;
}
// 获得某列的名字,而目前各列的名字保存在字符串数组columnNames中
public String getColumnName(int col) {
return columnNames[col];
}
// 获得某行某列的数据,而数据保存在对象数组data中
public Object getValueAt(int row, int col) {
return data[row][col];
}
// 判断每个单元格的类型
public Class getColumnClass(int c) {
return getValueAt(0, c).getClass();
}
// 将表格声明为可编辑的
public boolean isCellEditable(int row, int col) {
if (col < 2) {
return false;
} else {
return true;
}
}
// 改变某个数据的值
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 && !(value instanceof Integer)) {
try {
data[row][col] = new Integer(value.toString());
fireTableCellUpdated(row, col);
} catch (NumberFormatException e) {
JOptionPane.showMessageDialog(JTableDemo.this, "The \""
+ getColumnName(col)
+ "\" column accepts only integer values.");
}
} else {
data[row][col] = value;
fireTableCellUpdated(row, col);
}
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) {
JTableDemo frame = new JTableDemo();
frame.pack();
frame.setVisible(true);
}
}
[代码运行效果截图]