我不明白一旦我用完了其中一个角(NORTH,EAST,WEST,SOUTH)后我怎么能显示两个类,如何使用边框布局添加第五个类?正如您在构建按钮区域中看到的,我需要能够有两个类,我不关心在Tastybois类的哪个位置,我只需要能够显示5个内容。
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;
public class IkeaRun extends JFrame{
private IkeaMainDish Dish;
private Drinks drinks;
private SideDish Side;
private IkeaGreetings greeting;
private TastyBois tastybois;
private JPanel mainPanel;
private JButton calcButton;
private JButton exitButton;
private final double taxRate = 0.06;
public IkeaRun(){
setTitle("ORDER");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setLayout(new BorderLayout());
greeting = new IkeaGreetings();
Dish = new IkeaMainDish();
drinks = new Drinks();
Side = new SideDish();
tastybois = new TastyBois();
buildButtons();
add(greeting, BorderLayout.NORTH);
add(Dish, BorderLayout.WEST);
add(drinks, BorderLayout.CENTER);
add(Side, BorderLayout.EAST);
add(mainPanel, BorderLayout.SOUTH);
add(tastybois, BorderLayout.EAST);
pack();
setVisible(true);
}
private void buildButtons(){
mainPanel = new JPanel();
calcButton = new JButton("Order");
exitButton = new JButton("Cancel");
calcButton.addActionListener(new CalcButtonListener());
exitButton.addActionListener(new ExitButtonListener());
mainPanel.add(calcButton);
mainPanel.add(exitButton);
}
private class CalcButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
double subtotal = 0.0;
double tax = 0.0;;
double total = 0.0;
subtotal = Dish.getDishPrice() +
drinks.getDrinkPrice() +
Side.getSidePrice();
tax = subtotal * taxRate;
total = subtotal + tax;
DecimalFormat dollar = new DecimalFormat("0.00");
JOptionPane.showMessageDialog(null, "Subtotal: $" + dollar.format(subtotal) + "\n" + "Tax: $" + dollar.format(tax) + "\n" + "Total: $" + dollar.format(total));
}
}
private class ExitButtonListener implements ActionListener
{
public void actionPerformed(ActionEvent e)
{
System.exit(0);
}
}
}
答案 0 :(得分:0)
通常使用第二个JPanel,所以你有一个层次结构,你的主要JPanel(这里称为容器)通过BorderLayout保存5个其他JPanel,在每个子面板上设置一个新的LayoutManager并向其添加组件。