TA貢獻1802條經驗 獲得超4個贊
我很確定您的意思是要在面板上繪制圖像。首先，我建議您在項目 src 文件夾中創建一個資源文件夾，并在那里添加所有圖像。完成后，您必須使用 imageIO 加載圖像并使用 drawImage 繪制它。這是一個簡短的示例：
package asteroid;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
public class Nave {
BufferedImage iconeNave;
public Nave( ... ) {
try{
iconeNave = ImageIO.read(getClass().getResource("/resources/nave.png"));
}catch(IOException e){e.printStackTrace();}
catch(Exception e){e.printStackTrace();}
}
@Override
public void paint(Graphics2D g2){
AffineTransform at = new AffineTransform();
at.translate((int)x + radius/2.5,(int)y + radius/2.5);
at.rotate(Math.PI/2 + angle);
at.translate(-iconeNave.getWidth()/2, -iconeNave.getHeight()/2);
g2.drawImage(iconeNave, at, null);
}
}
TA貢獻1812條經驗 獲得超5個贊
為了在 Java 中創建圖像，您首先需要創建一個 JPanel（本質上是屏幕上的一個窗口）。它看起來像這樣（取自 javacodex.com）：
import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.swing.*;
import javax.imageio.ImageIO;
public class JPanelExample {
public static void main(String[] arguments) throws IOException {
JPanel panel = new JPanel();
BufferedImage image = ImageIO.read(new File("./java.jpg"));
JLabel label = new JLabel(new ImageIcon(image));
panel.add(label);
// main window
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("JPanel Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// add the Jpanel to the main window
frame.add(panel);
frame.pack();
frame.setVisible(true);
}
}
但是，我假設“圖像”是指在屏幕上繪制的形狀（因為您在示例中使用了繪制圓的繪制方法）。然后，您的代碼采用正確的方法，但需要實現 JPanel（因為沒有 JPanel 或 JFrame，您實際上無法在屏幕上以圖形方式顯示任何內容）。
下面是取自我的 Atari Breakout 迷你游戲的 Board.java 的示例：
public class Board extends JPanel implements KeyListener {
// Other Game Code
public void paint(Graphics g) {
super.paint(g);
Graphics2D g2 = (Graphics2D) g;
g2.setColor(Color.BLACK);
// Shows lives left and score on screen
g2.drawString("Lives left: " + lives, 400, 600);
g2.drawString("Score: " + score, 400, 500);
// Paints Walls (separate paint method created in wall class)
topWall.paint(g2);
bottomWall.paint(g2);
leftWall.paint(g2);
rightWall.paint(g2);
// Paints 2 Balls (separate paint method created in ball class)
b.paint(g2);
b2.paint(g2);
// Paints Paddle (separate paint method created in paddle class)
paddle.paint(g2);
// Paints Bricks based on current level (separate paint method created in brick class)
// Bricks were created/stored in 2D Array, so drawn on screen through 2D Array as well.
if (level == 1) {
for (int x = 0; x < bricks.length; x++) {
for (int i = 0; i < bricks[0].length; i++) {
bricks[x][i].paint(g2);
}
}
}
if (level == 2) {
for (int x = 0; x < bricks.length; x++) {
for (int i = 0; i < bricks[0].length; i++) {
bricks[x][i].paint(g2);
}
}
}
}
這是 Paddle 類中的 Paint 方法的示例：
// Constructor
public Paddle(int x, int y, int w, int h){
xpos = x;
ypos = y;
width = w;
height = h;
r = new Rectangle(xpos, ypos, width, height);
}
public void paint(Graphics2D g2){
g2.fill(r);
}
輸出（屏幕上顯示的內容）：
舉報