Swing 表格 代码

JAVA swing 表格

package swing;
import javax.swing.JTable;
  import javax.swing.table.AbstractTableModel;
  import javax.swing.JScrollPane;
  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() { //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 = {
        {"Wang Yi", "Executive",
        "01068790231", new Integer(5000), new Boolean(false)},
        {"Li Si", "Secretary",
        "01069785321", new Integer(3500), new Boolean(true)},
        {"Li Wu", "Manager",
        "01065498732", new Integer(4500), new Boolean(false)},
        {"Zhao Liu", "Safeguard",
        "01062796879", new Integer(2000), new Boolean(true)},
        {"Chen Qi", "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(TableDemo.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) {
   TableDemo frame = new TableDemo();
   frame.pack();
   frame.setVisible(true);
  }
 }