图形用户界面设计表格组件示例

1、程序运行结果截图：程序清单如下：import javax.swing.*;import java.awt.*;import java.awt.event.*;public class Example10_16public static void main(String arts )Win win = new Win();class Win extends JFrame implements ActionListenerJTable table;Object a;Object name = 商品名称,单价,销售量,销售额;JButton computerRows,computerColums;J

2、TextField inputRowsNumber;int initRows = 1;JPanel pSouth,pNorth;int count = 0,rowsNumber = 0;Win()computerRows = new JButton(每件商品销售额);computerColums = new JButton(总销售额);inputRowsNumber = new JTextField(10);computerRows.addActionListener(this);computerColums.addActionListener(this);inputRowsNumber.ad

3、dActionListener(this);pSouth = new JPanel();pNorth = new JPanel();pNorth.add(new JLabel(输入表格行数，回车确认);pNorth.add(inputRowsNumber);pSouth.add(computerRows);pSouth.add(computerColums);add(pSouth,BorderLayout.SOUTH);add(pNorth,BorderLayout.NORTH);add(new JScrollPane(table),BorderLayout.CENTER);setBounds

4、(100,100,370,250);setVisible(true);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);public void actionPerformed(ActionEvent e)if(e.getSource() = inputRowsNumber)count = 0;initRows = Integer.parseInt(inputRowsNumber.getText();a = new ObjectinitRows4;for(int i = 0;i initRows;i+)for(int j = 0;j 4;j+)aij

5、= 0;table = new JTable(a,name);table.setRowHeight(20);getContentPane().removeAll();add(new JScrollPane(table),BorderLayout.CENTER);add(pSouth,BorderLayout.SOUTH);add(pNorth,BorderLayout.NORTH);validate();else if(e.getSource() = computerRows)int rows = table.getRowCount(); /获取现有表格行数for(int i = 0;i ro

6、ws;i+)double sum = 1;boolean boo = true;for(int j = 1;j = 2;j+)trysum = sum * Double.parseDouble(aij.toString();catch(Exception ee)boo = false;table.repaint(); /表格更新显示if(boo = true)ai3 = + sum; /修改数组中的数据table.repaint();else if(e.getSource() = computerColums)if(count = 0)rowsNumber = table.getRowCoun

7、t(); /获取表格的目前的行数count+;elserowsNumber = table.getRowCount(); /获取表格的目前的行数rowsNumber = rowsNumber - 1; /不要最后一行double totalSum = 0;for(int j = 0;j rowsNumber;j+)totalSum = totalSum + Double.parseDouble(aj3.toString();Object b = new ObjectrowsNumber + 14; /比数组a多一行的数组for(int i = 0;i rowsNumber;i+) /将数组a的数据复制到数组b中for(int j = 0;j 4;j+)bij = aij;browsNumber0 = 一共有 + rowsNumber + 件商品;browsNumber3 = 总销售额 + totalSum;a = b; /重新初始化atable = new JTable(a,name);getContentPane().removeAll();a