lyh_prob_2.java

JTable的一个例子

//Author@ [e-mail]
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;

import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumnModel;



public class LYH_prob_2 {
    private JFrame frame = null;

    private JTable table = null;

    private Table_Model model = null;

    private JScrollPane s_pan = null;

    private JButton button_1 = null, button_2 = null;//, button_3 = null;

    private JPanel pane = null;
    
    private Integer ID = 0; 

    /**
	 * @param args
	 */
    public LYH_prob_2() {
        frame = new JFrame("JTableTest-李耀华");
        pane = new JPanel();
        
        //定义删除数据的BUTTON
        button_1 = new JButton("删除数据");
        button_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                removeData();
            }
        });
        
        //定义添加数据的BUTTON
        button_2 = new JButton("添加数据");
        button_2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                addData();
            }
        });

        pane.add(button_1);
        pane.add(button_2);
        model = new Table_Model();
        table = new JTable(model);
        table.setBackground(Color.white);
        TableColumnModel tcm = table.getColumnModel();
        
        //设置每项的宽度
        tcm.getColumn(0).setPreferredWidth(50);
        tcm.getColumn(1).setPreferredWidth(50);
        tcm.getColumn(2).setPreferredWidth(50);
        tcm.getColumn(3).setPreferredWidth(50);
        tcm.getColumn(4).setPreferredWidth(50);

        s_pan = new JScrollPane(table);

        frame.getContentPane().add(s_pan, BorderLayout.CENTER);
        frame.getContentPane().add(pane, BorderLayout.NORTH);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 200);
        frame.setVisible(true);

    }
    
    //默认添加为以下内容
    private void addData() {
        model.addRow( ID++, "李耀华", new Integer(100), new Integer(100), new Integer(200));
        table.updateUI();
    }

    //删除指定的行
    private void removeData() {
    	if(table.getSelectedRow() != -1)
        model.removeRow( table.getSelectedRow() );
        table.updateUI();
    }

    public static void main(String args[]) {
        new LYH_prob_2();
    }

}

/**
* TableModel类，继承了AbstractTableModel
*/
class Table_Model extends AbstractTableModel {

    private static final long serialVersionUID = -7495940408592595397L;

    private Vector content = null;

    private String[] title_name = { "ID", "姓名", "语文", "数学", "总分" };

    public Table_Model() {
        content = new Vector();
    }

    public Table_Model(int count) {
        content = new Vector(count);
    }

    public void addRow(Integer ID, String name, Integer chn, Integer math, Integer total ) {
        Vector v = new Vector(4);
        v.add(0, ID.toString() );
        v.add(1, name);
        v.add(2, chn);
        v.add(3, math);
        v.add(4, total);
        content.add(v);
    }

    public void removeRow(int row) {
        content.remove(row);
    }

    public void removeRows(int row, int count) {
        for (int i = 0; i < count; i++) {
            if (content.size() > row) {
                content.remove(row);
            }
        }
    }

    
    //让表格中某些值可修改，但需要setValueAt(Object value, int row, int col)方法配合才能使修改生效
    public boolean isCellEditable(int rowIndex, int columnIndex) {
        
        return true;
    }


    //使修改的内容生效
    public void setValueAt(Object value, int row, int col) {
        ((Vector) content.get(row)).remove(col);
        ((Vector) content.get(row)).add(col, value);
        this.fireTableCellUpdated(row, col);
    }

    public String getColumnName(int col) {
        return title_name[col];
    }

    public int getColumnCount() {
        return title_name.length;
    }

    public int getRowCount() {
        return content.size();
    }

    public Object getValueAt(int row, int col) {
        return ((Vector) content.get(row)).get(col);
    }


    //返回数据类型
    public Class getColumnClass(int col) {
        return getValueAt(0, col).getClass();
    }
}