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); } }