sellshoe.java

一 实习题目：用java实现表单系统 二 设计思想：用java语言实现一个批发货物的表单系统。在本次实习中

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

public class SellShoe
    extends JFrame {

  public NoEditTableModel data = new NoEditTableModel();
  public JTable table = new JTable(data);
  public JLabel price = new JLabel("￥0.0", SwingConstants.RIGHT);
        
  
  private class WindowCloser
      extends WindowAdapter {
    public void windowClosing(WindowEvent we) {
      System.exit(0);
    }
  }

  public SellShoe() {
    super("批发鞋的表格");
    createDataColumns();
    createSampleData();
    JScrollPane scrollTable = new JScrollPane(table);
    price.setText("总的价钱: ￥" + total());
    scrollTable.setPreferredSize(new Dimension(400,100));

    table.setBackground(new Color(254,253,25)); 
    scrollTable.setBackground(new Color(254,253,25)); 
    getContentPane().add("Center", new JPanelBox(scrollTable, "购买鞋子表格"));
    getContentPane().add("South", new JPanelBox(price, "应付总钱"));
    addWindowListener(new WindowCloser());
    table.addMouseListener(new SellShoePopup(this));
    table.setToolTipText("单击右键—菜单");

    validate();
    pack();
    setVisible(true);
  }

  private void createDataColumns() {
    /* create columns with appropriate headers */
    data.addColumn("皮鞋号码");
    data.addColumn("皮鞋颜色");
    data.addColumn("皮鞋单价");
    data.addColumn("购鞋数量");
    data.addColumn("应付总和");
  }

  private void createSampleData() {
    /* create some sample data */
    data.addRow(dataRow(36, "红", 80, 1));
    data.addRow(dataRow(37, "黑", 50, 1));
    data.addRow(dataRow(38, "蓝", 150, 4));
    data.addRow(dataRow(39, "白", 30, 1));
    data.addRow(dataRow(40, "橙", 40, 1));
    data.addRow(dataRow(41, "粉", 160, 1));
    data.addRow(dataRow(42, "灰", 200, 1));
  }

  private Object[] dataRow(int id, String desc, double price, int num) {
    /* utility method to convert basic types into array of Objects */
    Object row[] = new Object[5];
    row[0] = new Integer(id);
    row[1] = desc;
    row[2] = new Double(price);
    row[3] = new Integer(num);
    row[4] = new Double(price * num);
    return row;
  }

  protected double total() {
    /* computes the total in the last column of the table */
    double sum = 0.0;
    for (int row = 0; row < data.getRowCount(); row++) {
      sum += ( (Double) data.getValueAt(row, 4)).doubleValue();
    }
    return sum;
  }

  public static void main(String args[]) {
    SellShoe st = new SellShoe();
  }
}