adjustingwidth.java

疯狂Java讲义_源码(含Java设计模式CHM

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import javax.swing.event.*;
/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class AdjustingWidth
{
	JFrame jf = new JFrame("调整表格列宽");
	JMenuBar menuBar = new JMenuBar();
	JMenu adjustModeMenu = new JMenu("调整方式");
	JMenu selectUnitMenu = new JMenu("选择单元");
	JMenu selectModeMenu = new JMenu("选择方式");

	//定义5个单选框按钮，用以控制表格的宽度调整方式
	JRadioButtonMenuItem[] adjustModesItem = new JRadioButtonMenuItem[5];
	//定义3个单选框按钮，用以控制表格的选择方式
	JRadioButtonMenuItem[] selectModesItem = new JRadioButtonMenuItem[3];

    JCheckBoxMenuItem rowsItem = new JCheckBoxMenuItem("选择行");
    JCheckBoxMenuItem columnsItem = new JCheckBoxMenuItem("选择列");
    JCheckBoxMenuItem cellsItem = new JCheckBoxMenuItem("选择单元格");
	ButtonGroup adjustBg = new ButtonGroup();
	ButtonGroup selectBg = new ButtonGroup();
	//定义一个int类型的数组，用于保存表格所有的宽度调整方式
	int[] adjustModes = new int[]{
		JTable.AUTO_RESIZE_OFF,
		JTable.AUTO_RESIZE_NEXT_COLUMN,
		JTable.AUTO_RESIZE_SUBSEQUENT_COLUMNS,
		JTable.AUTO_RESIZE_LAST_COLUMN,
		JTable.AUTO_RESIZE_ALL_COLUMNS 
	};
	int[] selectModes = new int[]{
		ListSelectionModel.MULTIPLE_INTERVAL_SELECTION ,
		ListSelectionModel.SINGLE_INTERVAL_SELECTION ,
		ListSelectionModel.SINGLE_SELECTION
	};
	JTable table;
	//定义二维数组作为表格数据
	Object[][] tableData = 
	{
		new Object[]{"李清照" , 29 , "女"},
		new Object[]{"苏格拉底", 56 , "男"},
		new Object[]{"李白", 35 , "男"},
		new Object[]{"弄玉", 18 , "女"},
		new Object[]{"虎头" , 2 , "男"}
	};
	//定义一维数据作为列标题
	Object[] columnTitle = {"姓名" , "年龄" , "性别"};

	public void init()
	{
		//以二维数组和一维数组来创建一个JTable对象
		table = new JTable(tableData , columnTitle);

		//-----------为窗口安装设置表格调整方式的菜单-----------
		adjustModesItem[0] = new JRadioButtonMenuItem("只调整表格");
		adjustModesItem[1] = new JRadioButtonMenuItem("只调整下一列");
		adjustModesItem[2] = new JRadioButtonMenuItem("平均调整余下列");
		adjustModesItem[3] = new JRadioButtonMenuItem("只调整最后一列");
		adjustModesItem[4] = new JRadioButtonMenuItem("平均调整所有列");
		menuBar.add(adjustModeMenu);
		for (int i = 0; i < adjustModesItem.length ; i++)
		{
			//默认选中第三个菜单项，即对应表格默认的宽度调整方式
			if (i == 2)
			{
				adjustModesItem[i].setSelected(true);
			}
			adjustBg.add(adjustModesItem[i]);
			adjustModeMenu.add(adjustModesItem[i]);
			final int index = i;
			//为设置调整方式的菜单项添加监听器
			adjustModesItem[i].addActionListener(new ActionListener()
			{
				public void actionPerformed(ActionEvent evt)
				{
					//如果当前菜单项处于选中状态，表格使用对应的调整方式
					if (adjustModesItem[index].isSelected())
					{
						table.setAutoResizeMode(adjustModes[index]);
					}
				}
			});
		}
		//-----------为窗口安装设置表格选择方式的菜单-----------
		selectModesItem[0] = new JRadioButtonMenuItem("无限制");
		selectModesItem[1] = new JRadioButtonMenuItem("单独的连续区");
		selectModesItem[2] = new JRadioButtonMenuItem("单选");
		menuBar.add(selectModeMenu);
		for (int i = 0; i < selectModesItem.length ; i++)
		{
			//默认选中第一个菜单项，即对应表格默认的选择方式
			if (i == 0)
			{
				selectModesItem[i].setSelected(true);
			}
			selectBg.add(selectModesItem[i]);
			selectModeMenu.add(selectModesItem[i]);
			final int index = i;
			//为设置选择方式的菜单项添加监听器
			selectModesItem[i].addActionListener(new ActionListener()
			{
				public void actionPerformed(ActionEvent evt)
				{
					//如果当前菜单项处于选中状态，表格使用对应的选择方式
					if (selectModesItem[index].isSelected())
					{
						table.getSelectionModel().setSelectionMode(selectModes[index]);
					}
				}
			});
		}
		menuBar.add(selectUnitMenu);
		//-----------为窗口安装设置表格选择单元的菜单-----------
		rowsItem.setSelected(table.getRowSelectionAllowed());
		columnsItem.setSelected(table.getColumnSelectionAllowed());
		cellsItem.setSelected(table.getCellSelectionEnabled());

		rowsItem.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent event)
			{
				table.clearSelection();
				//如果该菜单项处于选中状态，设置表格的选择单元是行
				table.setRowSelectionAllowed(rowsItem.isSelected());
				//如果选择行、选择列同时被选中，其实质是选择单元格
				cellsItem.setSelected(table.getCellSelectionEnabled());
			}
		});
		selectUnitMenu.add(rowsItem);
		columnsItem.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent event)
			{
				table.clearSelection();
				//如果该菜单项处于选中状态，设置表格的选择单元是列
				table.setColumnSelectionAllowed(columnsItem.isSelected());
				//如果选择行、选择列同时被选中，其实质是选择单元格
				cellsItem.setSelected(table.getCellSelectionEnabled());
			}
		});
		selectUnitMenu.add(columnsItem);
		cellsItem.addActionListener(new	ActionListener()
		{
			public void actionPerformed(ActionEvent event)
			{
				table.clearSelection();
				//如果该菜单项处于选中状态，设置表格的选择单元是单元格
				table.setCellSelectionEnabled(cellsItem.isSelected());
				//该选项的改变会同时影响选择行、选择列两个菜单
				rowsItem.setSelected(table.getRowSelectionAllowed());
				columnsItem.setSelected(table.getColumnSelectionAllowed());
			}
		});
		selectUnitMenu.add(cellsItem);

		jf.setJMenuBar(menuBar);
		//分别获取表格的三个表格列，并设置三列的最小宽度，最佳宽度和最大宽度
		TableColumn nameColumn = table.getColumn(columnTitle[0]);
		nameColumn.setMinWidth(40);
		TableColumn ageColumn = table.getColumn(columnTitle[1]);
		ageColumn.setPreferredWidth(50);
		TableColumn genderColumn = table.getColumn(columnTitle[2]);
		genderColumn.setMaxWidth(50);


		//将JTable对象放在JScrollPane中，并将该JScrollPane放在窗口中显示出来
		jf.add(new JScrollPane(table));
		System.out.println(table.getModel());
		jf.pack();
		jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		jf.setVisible(true);
	}

    public static void main(String[] args) 
    {
		new AdjustingWidth().init();
    }
}