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[英]Trying to create a frame full of JButtons, but my JButtons won't load
[英]JButtons won't update on button click
當前顯示帶有8x8隨機彩色按鈕網格的GUI。 newButton用於將得分顯示重置為0,並像單擊后啟動時一樣重新設置網格。 除了Java與顯示按鈕的方式以及分層的工作方式有關,我無法找到許多解決方案。 這是我正在使用的2個類。
import javax.swing.JFrame;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.JPanel;
import java.awt.Color;
public class ShinyButtonsApp extends JFrame implements ActionListener {
private static byte ROWS = 8;
public int useThis;
ShinyButtons shiny = new ShinyButtons();
public static ImageIcon[] icons = {new ImageIcon("RedButton.png"),
new ImageIcon("OrangeButton.png"),
new ImageIcon("YellowButton.png"),
new ImageIcon("GreenButton.png"),
new ImageIcon("BlueButton.png"),
new ImageIcon("LightGrayButton.png"),
new ImageIcon("DarkGrayButton.png")};
public ShinyButtonsApp(String title) {
super(title); // Set title of window
setDefaultCloseOperation(EXIT_ON_CLOSE); // allow window to close
setSize(578, 634); // Set size of window
setResizable(false);
getContentPane().setLayout(null);
JLabel aLabel = new JLabel("Score: ");
aLabel.setLocation(10, 570);
aLabel.setSize(80,30);
getContentPane().add(aLabel);
JTextField scoreField = new JTextField();
scoreField.setText(Integer.toString(shiny.score));
scoreField.setEditable(false);
scoreField.setHorizontalAlignment(JTextField.RIGHT);
scoreField.setLocation(60, 570);
scoreField.setSize(120,30);
scoreField.setBackground(Color.WHITE);
getContentPane().add(scoreField);
JButton newButton = new JButton("New Game");
newButton.addActionListener(this);
newButton.setLocation(348,570);
newButton.setSize(110,30);
getContentPane().add(newButton);
JButton quitButton = new JButton("Quit");
quitButton.setLocation(468,570);
quitButton.setSize(80,30);
getContentPane().add(quitButton);
resetButtons2();
}
public void actionPerformed(ActionEvent e) {
shiny.score = 0;
shiny.resetButtons();
resetButtons2();
}
public void resetButtons2() {
for (int r=0; r<ROWS; r++) {
for (int c=0; c<ROWS; c++) {
ImageIcon image1 = icons[(int)shiny.getButton(r,c)];
JButton button = new JButton(image1);
button.setLocation(10+(69*r),10+(69*c));
button.setSize(69,69);
button.setBorder(BorderFactory.createLineBorder(Color.GRAY,1));
getContentPane().add(button);
}
}
}
public static void main(String[] args) {
ShinyButtonsApp frame;
frame = new ShinyButtonsApp("Shiny Buttons"); // Create window
frame.setVisible(true); // Show window
}
}
和
import javax.swing.JFrame;
import javax.swing.*;
import java.awt.event.*;
import javax.swing.JPanel;
import java.awt.Color;
public class ShinyButtons extends JPanel{
public static byte RED = 0;
public static byte ORANGE = 1;
public static byte YELLOW = 2;
public static byte GREEN = 3;
public static byte BLUE = 4;
public static byte LIGHT_GRAY = 5;
public static byte DARK_GRAY = 6;
public static byte ROWS = 8;
public byte[][] buttonTable;
public int score = 0;
public ShinyButtons() {
buttonTable = new byte[ROWS][ROWS];
resetButtons();
}
public void resetButtons() {
for (int r=0; r<ROWS; r++)
for (int c=0; c<ROWS; c++)
buttonTable[r][c] = (byte)(Math.random()*7);
}
public byte getButton(int r, int c) { return buttonTable[r][c]; }
public int getScore() { return score; }
}
您將在resetButtons2()
中創建一組新的按鈕,並將它們放置在相同位置的現有按鈕組的頂部(或下面)。 您應該創建一次按鈕組,並且僅在重置后更新它們的圖標。
您應該做一些事情:
對於JFrame
您不需要getContentPane().add(...)
,您可以直接執行add(...)
兩件事情。
首先,請確保先刪除現有按鈕。 或者,您可以簡單地更新按鈕的狀態。 這將需要您首先創建一個數組或按鈕List
,然后您的reset方法將對其進行迭代並根據需要更新其屬性。
其次,使用適當的布局管理器。 null
布局是一個非常糟糕的主意。 您不控制基礎平台的字體指標,這將改變按鈕在不同系統上的外觀,使用戶界面的動態性降低
建立在什么這個答案指出(使用布局管理器,而不是設置大小,你應該做的),你可以只通過該組件(循環的圖像復位JLabels
)的中JPanel
並改變它們的圖標。
這個特定的示例將JLabels
與MouseListeners
一起使用,但可以輕松將其與ActionListeners
切換為JButtons
newGame.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
reset(iconPanel, icons); <--- call reset method from below
score = 0;
scoreField.setText(String.valueOf(score));
}
});
....
private void reset(JPanel panel, ImageIcon[] icons) {
Component[] comps = panel.getComponents();
Random random = new Random();
for(Component c : comps) {
if (c instanceof JLabel) {
JLabel button = (JLabel)c;
int index = random.nextInt(icons.length);
button.setIcon(icons[index]);
}
}
}
這是完整的運行代碼。 您只需要替換圖像路徑。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.Random;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.border.LineBorder;
public class CircleImages {
private int score = 0;
private JTextField scoreField = new JTextField(10);
public CircleImages() {
scoreField.setEditable(false);
final ImageIcon[] icons = createImageIcons();
final JPanel iconPanel = createPanel(icons, 8);
JPanel bottomLeftPanel = new JPanel(new FlowLayout(FlowLayout.LEADING));
bottomLeftPanel.add(new JLabel("Score: "));
bottomLeftPanel.add(scoreField);
JPanel bottomRightPanel = new JPanel(new FlowLayout(FlowLayout.TRAILING));
JButton newGame = new JButton("New Game");
bottomRightPanel.add(newGame);
JButton quit = new JButton("Quit");
bottomRightPanel.add(quit);
JPanel bottomPanel = new JPanel(new GridLayout(1, 2));
bottomPanel.add(bottomLeftPanel);
bottomPanel.add(bottomRightPanel);
newGame.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e) {
reset(iconPanel, icons);
score = 0;
scoreField.setText(String.valueOf(score));
}
});
JFrame frame = new JFrame();
frame.add(iconPanel);
frame.add(bottomPanel, BorderLayout.PAGE_END);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private void reset(JPanel panel, ImageIcon[] icons) {
Component[] comps = panel.getComponents();
Random random = new Random();
for(Component c : comps) {
if (c instanceof JLabel) {
JLabel button = (JLabel)c;
int index = random.nextInt(icons.length);
button.setIcon(icons[index]);
}
}
}
private JPanel createPanel(ImageIcon[] icons, int gridSize) {
Random random = new Random();
JPanel panel = new JPanel(new GridLayout(gridSize, gridSize));
for (int i = 0; i < gridSize * gridSize; i++) {
int index = random.nextInt(icons.length);
JLabel label = new JLabel(icons[index]);
label.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent e) {
score += 1;
scoreField.setText(String.valueOf(score));
}
});
label.setBorder(new LineBorder(Color.GRAY, 2));
panel.add(label);
}
return panel;
}
private ImageIcon[] createImageIcons() {
String[] files = {"blackcircle.png",
"bluecircle.png",
"greencircle.png",
"greycircle.png",
"orangecircle.png",
"redcircle.png",
"yellowcircle.png"
};
ImageIcon[] icons = new ImageIcon[files.length];
for (int i = 0; i < files.length; i++) {
icons[i] = new ImageIcon(getClass().getResource("/circles/" + files[i]));
}
return icons;
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
new CircleImages();
}
});
}
}
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