我在这里寻求一些帮助。
我的任务是创建一个带有GUI界面而不是控制台界面的停车场管理系统。该系统有15个空间 - 其中5个空间很大，只适合'大型'车辆 - 另外10个是常规空间。它们是否大，取决于停车场的停车服务员。
进入停车场后，服务员需要填写有关汽车的信息（车辆的编号，并点击“是”或“否”单选按钮，判断该车是否为“高价值” ，或者如果汽车是“大型车辆”）
我正在尝试构建界面，当程序运行时首先显示停车场（当空间可用时空间将从红色变为绿色，反之亦然）我使用Graphics2D绘制。 （此时我不知道如何使它出现在JFrame或我需要使用的任何东西）在绘制的停车场，颜色变化，我将包括3个JButtons - 一个'添加汽车'，'删除一辆车'和'搜索汽车'。我不确定如何将'carPark'组件和前面提到的JButton设置为运行时出现的窗口。
因此，当我点击这些按钮时，会出现一个新窗口，显示与每个按钮相关的表格（添加，删除和搜索）
我必须做些什么才能让停车场和按钮出现在同一个窗口中。
这是我到目前为止创建的代码 - 尽管它非常不整洁，而且在一个类中，我知道最近会发生什么，并计划在我工作之后将其拆分。 （我知道这对编写代码没有效率）：
package carparksystem;
import javax.swing.*;
import javax.swing.JTabbedPane;
import javax.swing.JPanel;
import java.awt.Color;
public class DrawCarPark extends javax.swing.JFrame
{
public DrawCarPark()
{
JButton addACar = new JButton("Add Car");
JButton removeACar = new JButton("Remove Car");
JButton searchCars = new JButton("Search Cars");
JFrame frame = new JFrame();
frame.add(new CarPark());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Car Park System");
frame.setSize(435, 600);
frame.setVisible(true);
frame.setResizable(false);
//frame.add(addACar);
//frame.add(removeACar);
//frame.add(searchCars);
GroupLayout mainLayout = new GroupLayout(getContentPane()); //chosen to display components in group layout
getContentPane().setLayout(mainLayout);
mainLayout.setAutoCreateGaps(true);
mainLayout.setAutoCreateContainerGaps(true);
mainLayout.setHorizontalGroup(mainLayout.createSequentialGroup()
.addGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(frame)
.addGroup(mainLayout.createSequentialGroup()
.addGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(addACar))
.addGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(removeACar))
.addGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(searchCars))))
);
mainLayout.setVerticalGroup(mainLayout.createSequentialGroup()
.addGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(frame)
.addGroup(mainLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(addACar)
.addComponent(removeACar)
.addComponent(searchCars)))
);
//addCarForm();
//removeCarForm();
//searchCarForm();
}
private void addCarForm()
{
/*JPanel panel = new JPanel();
//frame.add(panel);
panel.setSize(450, 650);
panel.setVisible(true);
panel.getSize();*/
JLabel regNumLabel = new JLabel("Registration Number:");
JLabel highValLabel = new JLabel("High Value?");
JLabel largeLabel = new JLabel("Large Vehicle?");
JRadioButton btnYesHighVal = new JRadioButton("Yes", false);
JRadioButton btnNoHighVal = new JRadioButton("No", true);
JRadioButton btnYesLarge = new JRadioButton("Yes", false);
JRadioButton btnNoLarge = new JRadioButton("No", true);
ButtonGroup highVal = new ButtonGroup(); //allows just one radio button from the group to be selected
highVal.add(btnYesHighVal);
highVal.add(btnNoHighVal);
ButtonGroup largeCar = new ButtonGroup(); //allows just one radio button from the group to be selected
largeCar.add(btnYesLarge);
largeCar.add(btnNoLarge);
JTextField regNumField = new JTextField();
JButton addCar = new JButton(" Add ");
JButton addCancel = new JButton("Cancel");
GroupLayout addLayout = new GroupLayout(getContentPane()); //chosen to display components in group layout
getContentPane().setLayout(addLayout);
addLayout.setAutoCreateGaps(true);
addLayout.setAutoCreateContainerGaps(true);
addLayout.setHorizontalGroup(addLayout.createSequentialGroup()
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(regNumLabel)
.addComponent(highValLabel)
.addComponent(largeLabel))
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(regNumField)
.addGroup(addLayout.createSequentialGroup()
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(btnYesHighVal)
.addComponent(btnYesLarge))
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(btnNoHighVal)
.addComponent(btnNoLarge))))
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(addCar)
.addComponent(addCancel))
);
addLayout.setVerticalGroup(addLayout.createSequentialGroup()
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(regNumLabel)
.addComponent(regNumField)
.addComponent(addCar))
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addGroup(addLayout.createSequentialGroup()
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(highValLabel)
.addComponent(btnYesHighVal)
.addComponent(btnNoHighVal))
.addGroup(addLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(largeLabel)
.addComponent(btnYesLarge)
.addComponent(btnNoLarge)))
.addComponent(addCancel))
);
setSize(375, 150);
setTitle("Add Car");
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
}
private void removeCarForm()
{
JLabel regNumLabel = new JLabel("Registration Number:");
JTextField regNumField = new JTextField();
JButton removeCar = new JButton("Remove");
JButton removeCancel = new JButton("Cancel");
GroupLayout removeLayout = new GroupLayout(getContentPane());
getContentPane().setLayout(removeLayout);
removeLayout.setAutoCreateGaps(true);
removeLayout.setAutoCreateContainerGaps(true);
removeLayout.setHorizontalGroup(removeLayout.createSequentialGroup()
.addGroup(removeLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(regNumLabel))
.addGroup(removeLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(regNumField))
.addGroup(removeLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(removeCar)
.addComponent(removeCancel))
);
removeLayout.setVerticalGroup(removeLayout.createSequentialGroup()
.addGroup(removeLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(regNumLabel)
.addComponent(regNumField)
.addComponent(removeCar))
.addGroup(removeLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(removeCancel))
);
setSize(375, 150);
setTitle("Search Car");
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
}
private void searchCarForm()
{
JLabel regNumLabel = new JLabel("Registration Number:");
JTextField regNumField = new JTextField();
JButton searchCar = new JButton("Search");
JButton searchCancel = new JButton("Cancel");
GroupLayout searchLayout = new GroupLayout(getContentPane());
getContentPane().setLayout(searchLayout);
searchLayout.setAutoCreateGaps(true);
searchLayout.setAutoCreateContainerGaps(true);
searchLayout.setHorizontalGroup(searchLayout.createSequentialGroup()
.addGroup(searchLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(regNumLabel))
.addGroup(searchLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(regNumField))
.addGroup(searchLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(searchCar)
.addComponent(searchCancel))
);
searchLayout.setVerticalGroup(searchLayout.createSequentialGroup()
.addGroup(searchLayout.createParallelGroup(GroupLayout.Alignment.BASELINE)
.addComponent(regNumLabel)
.addComponent(regNumField)
.addComponent(searchCar))
.addGroup(searchLayout.createParallelGroup(GroupLayout.Alignment.LEADING)
.addComponent(searchCancel))
);
setSize(375, 150);
setTitle("Remove Car");
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
}
public static void main(String[]args)
{
DrawCarPark carPark = new DrawCarPark();
carPark.setVisible(true);
}
}
这里是我的主菜单类，我已经绘制了carPark：
package carparksystem;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JButton;
public class CarPark extends javax.swing.JPanel
{
private void draw(Graphics g)
{
Graphics2D g2 = (Graphics2D) g;
//Draw carpark boundary
g2.drawLine(20, 20, 400, 20);
g2.drawLine(20, 450, 20, 20);
g2.drawLine(20, 450, 400, 450);
g2.drawLine(400, 20, 400, 140);
g2.drawLine(400, 330, 400, 450);
g2.drawString("ENTER", 370, 180); //labels
g2.drawString("EXIT", 375, 300);
g2.setColor(Color.WHITE); //attendants box
g2.fill3DRect(330, 200, 70, 70, true);
g2.setColor(Color.BLACK);
g2.drawString("Attendant", 338, 230);
g2.drawString("Station", 345, 245);
g2.drawRect(330, 200, 70, 70);
g2.setColor(Color.GREEN);
g2.fillRect(40, 40, 50, 100); //8 first row spaces
g2.fillRect(110, 40, 50, 100); //7
g2.fillRect(180, 40, 50, 100); //6
g2.fillRect(250, 60, 40, 80); //2
g2.fillRect(310, 60, 40, 80); //1
g2.setColor(Color.BLACK); //drawRect palces a black border around shape
g2.drawRect(40, 40, 50, 100);
g2.drawRect(110, 40, 50, 100);
g2.drawRect(180, 40, 50, 100);
g2.drawRect(250, 60, 40, 80);
g2.drawRect(310, 60, 40, 80);
g2.setColor(Color.GREEN); //second row spaces
g2.fillRect(90, 195, 40, 80); //13
g2.fillRect(150, 195, 40, 80); //12
g2.fillRect(210, 195, 40, 80); //11
g2.fillRect(270, 195, 40, 80); //3
g2.setColor(Color.BLACK);
g2.drawRect(90, 195, 40, 80);
g2.drawRect(150, 195, 40, 80);
g2.drawRect(210, 195, 40, 80);
g2.drawRect(270, 195, 40, 80);
g2.setColor(Color.GREEN); //3rd row spaces
g2.fillRect(30, 330, 40, 80); //15
g2.fillRect(90, 330, 40, 80); //14
g2.fillRect(150, 330, 50, 100); //10
g2.fillRect(220, 330, 50, 100); //9
g2.fillRect(290, 330, 40, 80); //5
g2.fillRect(350, 330, 40, 80); //4
g2.setColor(Color.BLACK);
g2.drawRect(30, 330, 40, 80);
g2.drawRect(90, 330, 40, 80);
g2.drawRect(150, 330, 50, 100);
g2.drawRect(220, 330, 50, 100);
g2.drawRect(290, 330, 40, 80);
g2.drawRect(350, 330, 40, 80);
g2.drawString("1", 328, 105); //place labels on each shape
g2.drawString("2", 268, 105);
g2.drawString("3", 288, 240);
g2.drawString("4", 368, 375);
g2.drawString("5", 308, 375);
g2.drawString("6", 203, 95);
g2.drawString("7", 133, 95);
g2.drawString("8", 63, 95);
g2.drawString("9", 242, 385);
g2.drawString("10", 168, 385);
g2.drawString("11", 225, 240);
g2.drawString("12", 165, 240);
g2.drawString("13", 105, 240);
g2.drawString("14", 103, 375);
g2.drawString("15", 43, 375);
}
@Override
public void paintComponent(Graphics g)
{
draw(g);
}
}
如果有人愿意提供帮助，请提前致谢。
答案 0 :(得分：0)
您所问的实际问题的答案是＆＃34;使用JFrame和/或JPanel中的布局管理器来定位组件，但您认为已经知道了。您已在两个JFrame中使用了GroupLayout管理器。
我认为你的问题可能是你有两个。您在DrawCarPark中声明了一个JFrame变量，该类也扩展了JFrame。您可能不需要或不想要两者，这可能让您感到困惑 - 如果您希望在声明的JFrame中显示内容，则在不引用该实例的情况下调用的JFrame方法将传递编译器，因为DrawCarPark扩展了JFrame ，但他们不会做你想做的事。如果您想要一个包含所有GUI元素的窗口，请删除JFrame的变量或扩展名。
我可能会建议为剩下的JFrame使用不同的布局管理器 - 它的默认值是BorderLayout，在我看来，对你想要的东西可能更好。将您的按钮放入JPanel（使用您想要的任何其他布局管理器，GroupLayout或其他），并将该面板放在BorderLayout的NORTH部分。然后将您的CarPark面板放入BorderLayout的CENTER中，生成的JFrame将同时具有这两者。
祝你好运。