public class Main {
public static class GUI extends JFrame {
public GUI() {
//Title
super("Draw Card");
//panel
Panel buttonsPanel = new Panel();
Panel imagePanel = new Panel();
//App layout
setSize(600,480);
setLayout(new GridBagLayout());
GridBagConstraints gc = new GridBagConstraints();
//gc value
gc.gridy=0;gc.gridx=0;gc.gridwidth=1;gc.gridheight=1;gc.weightx=0.5;gc.weighty=0;gc.fill = GridBagConstraints.HORIZONTAL;
//layout in layout
GridLayout buttonsLayout = new GridLayout(1,2);
GridLayout imageLayout = new GridLayout(4,13);
buttonsPanel.setLayout(buttonsLayout);
imagePanel.setLayout(imageLayout);
//add
add(buttonsPanel,gc);
//change gc value
gc.gridy=1;gc.weighty=1;gc.gridheight=9;gc.fill = GridBagConstraints.BOTH;
//add
add(imagePanel,gc);
//button
JButton btn = new JButton("Draw card");
buttonsPanel.add(btn);
buttonsPanel.add(new JButton("Remove cards."));
//event
btn.addActionListener(e ->{
//just image from link
Image image = null;
try {
URL url = new URL("https://www.improvemagic.com/wp-content/uploads/2020/11/kj.png");
image = ImageIO.read(url);
} catch (IOException ee) {
ee.printStackTrace();
}
//add to label then add label to panel
JLabel label = new JLabel(new ImageIcon(image));
imagePanel.add(label);
revalidate();
});
//set visible
setVisible(true);
}
}
public static void main(String[] args){
GUI test = new GUI();
}
}
編輯：我不認為我可以在不破壞所有內容的情況下縮短它，只有一張圖片并且它在線，遇到了與我相同的問題。我已經在面板和布局上嘗試了一些東西來為每個單元格提供影像大小，但沒有奏效。
你好 ！我在保留完整影像時遇到了一些麻煩，我沒有找到完全獲取它們的單一方法，我是否錯過了這些布局的一些內容？我還是不習慣在這里發帖問我是否需要添加東西！謝謝 ！我有一個包含 2 個網格布局的 baglayout（一個用于按鈕，另一個用于我想通過單擊一個按鈕來添加隨機卡片）
uj5u.com熱心網友回復：
介紹
我重新撰寫了您的代碼以創建以下 GUI。
這是繪制幾張卡片后的相同 GUI。
結果JFrame為 822 x 420 像素。在 Swing 中，您從內到外作業。您創建 Swing 組件，將 Swing 組件放入JPanels，放入JPanelsa JFrame，然后查看結果的大小JFrame。
解釋
每當我創建 Swing GUI 時，我都會使用模型/視圖/控制器(MVC) 模式。這種模式意味著您首先創建模型，然后是視圖，然后是控制器。對于復雜的專案，該程序比瀑布更具有迭代性。
Swing 開發中的 MVC 模式意味著：
- 視圖從模型中讀取資訊。
- 視圖不會修改模型。
- 控制器修改模型并更新視圖。
There's usually not one controller class "to rule them all". Each Action or ActionListener class is responsible for its portion of the model and the view.
Model
I assumed you eventually wanted to read more than one card image, so I created a Card class. This class holds the card Image and whatever information you want about a playing card, including descriptive text, suit, int value, and int suit value.
I created a SomeCardGameModel class to hold a blank card, a card, and an int cardCount. The cardCount helps ensure that we don't draw more than 52 cards.
Reducing the size of the card image turned out to be a bit of a challenge. I used a search engine to find relevant bits of code and put them together in the SomeCardGameModel class. The main point is that you do all of the model creation before you create the view.
View
I started the Swing application with a call to the SwingUtilities invokeLater method. This method ensures that the Swing components will be created and executed on the Event Dispatch Thread.
I separated the creation of the JFrame and the JPanels into separate methods. This makes the code much easier for people to understand what you're doing.
The JFrame has a default BorderLayout. I used a BorderLayout for the main JPanel and GridLayouts for the button JPanel and the card JPanel. I added some spacing between the Swing components so you can see individual cards.
Controller
After creating a model and a view, your anonymous controller class is simplified. You should be able to create the controller for the "remove Cards" JButton.
Code
Here's the complete runnable code. I made all the additional classes inner classes so I can post this code as one block.
import java.awt.BorderLayout;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
public class SomeCardGame implements Runnable {
public static void main(String[] args) {
SwingUtilities.invokeLater(new SomeCardGame());
}
private JLabel[] cardLabels;
private final SomeCardGameModel model;
public SomeCardGame() {
this.model = new SomeCardGameModel();
}
@Override
public void run() {
JFrame frame = new JFrame("Draw Card");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(createMainPanel(), BorderLayout.CENTER);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
System.out.println(frame.getSize());
}
public JPanel createMainPanel() {
JPanel panel = new JPanel(new BorderLayout());
panel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
panel.add(createButtonPanel(), BorderLayout.NORTH);
panel.add(createCardPanel(), BorderLayout.CENTER);
return panel;
}
public JPanel createButtonPanel() {
JPanel panel = new JPanel(new GridLayout(0, 2, 5, 5));
panel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
JButton drawButton = new JButton("Draw card");
panel.add(drawButton);
drawButton.addActionListener(e -> {
int count = model.getCardCount();
if (count < 52) {
cardLabels[model.getCardCount()].setIcon(
new ImageIcon(model.getCard().getCardImage()));
model.incrementCardCount(1);
}
});
JButton removeButton = new JButton("Remove cards");
panel.add(removeButton);
return panel;
}
public JPanel createCardPanel() {
JPanel panel = new JPanel(new GridLayout(0, 13, 5, 5));
panel.setBorder(BorderFactory.createEmptyBorder(5, 5, 5, 5));
this.cardLabels = new JLabel[52];
for (int index = 0; index < cardLabels.length; index ) {
cardLabels[index] = new JLabel(new ImageIcon(
model.getBlankCard().getCardImage()));
panel.add(cardLabels[index]);
}
return panel;
}
public class SomeCardGameModel {
private int cardCount;
private final Card blankCard;
private final Card card;
public SomeCardGameModel() {
this.blankCard = new Card(createBlankCard());
BufferedImage image = readCard();
Image reducedImage = image.getScaledInstance(
56, 78, Image.SCALE_SMOOTH);
this.card = new Card(toBufferedImage(reducedImage));
this.cardCount = 0;
}
private BufferedImage createBlankCard() {
BufferedImage image = new BufferedImage(56, 78,
BufferedImage.TYPE_INT_RGB);
return image;
}
private BufferedImage readCard() {
try {
URL url = new URL("https://www.improvemagic.com/"
"wp-content/uploads/2020/11/kj.png");
return ImageIO.read(url);
} catch (IOException ee) {
ee.printStackTrace();
return null;
}
}
private BufferedImage toBufferedImage(Image img) {
if (img instanceof BufferedImage) {
return (BufferedImage) img;
}
BufferedImage bimage = new BufferedImage(
img.getWidth(null), img.getHeight(null),
BufferedImage.TYPE_INT_RGB);
// Draw the image on to the buffered image
Graphics2D bGr = bimage.createGraphics();
bGr.drawImage(img, 0, 0, null);
bGr.dispose();
// Return the buffered image
return bimage;
}
public Card getBlankCard() {
return blankCard;
}
public Card getCard() {
return card;
}
public int getCardCount() {
return cardCount;
}
public void incrementCardCount(int increment) {
this.cardCount = increment;
}
}
public class Card {
private final BufferedImage cardImage;
public Card(BufferedImage cardImage) {
this.cardImage = cardImage;
}
public BufferedImage getCardImage() {
return cardImage;
}
}
}
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