请帮助我，我需要按下按钮来旋转图像。目前，我有运动，但我不知道如何改变图像。我想如果我按下左箭头就是这样的package CarGame;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
public class CarGame extends JPanel implements ActionListener, KeyListener
{
Timer timer = new Timer(5, this);
int x = 0;
int y = 0;
int a = 0;
int b = 0;
public CarGame()
{
this.timer.start();
addKeyListener(this);
setFocusable(true);
setBackground(Color.WHITE);
}
@Override
public void paintComponent(Graphics g)
{
super.paintComponent(g);
ImageIcon i = new ImageIcon(getClass().getResource("right.png"));
g.drawImage(i.getImage(), this.x, this.y, this);
}
@Override
public void actionPerformed(ActionEvent e)
{
if (this.x < 0)
{
this.a = 0;
this.x = 0;
}
if (this.x > 865)
{
this.a = 0;
this.x = 865;
}
if (this.y < 0)
{
this.b = 0;
this.y = 0;
}
if (this.y > 490)
{
this.b = 0;
this.y = 490;
}
this.x += this.a;
this.y += this.b;
repaint();
}
@Override
public void keyPressed(KeyEvent e)
{
int c = e.getKeyCode();
if (c == 37)
{
this.a = -1;
this.b = 0;
}
if (c == 38)
{
this.a = 0;
this.b = -1;
}
if (c == 39)
{
this.a = 1;
this.b = 0;
}
if (c == 40)
{
this.a = 0;
this.b = 1;
}
}
@Override
public void keyTyped(KeyEvent e) {}
@Override
public void keyReleased(KeyEvent e)
{
this.a = 0;
this.b = 0;
}
public static void main(String[] args)
{
CarGame cg = new CarGame();
JFrame jf = new JFrame();
jf.setTitle("");
jf.setSize(1024, 600);
jf.setResizable(false);
jf.setLocationRelativeTo(null);
jf.setVisible(true);
jf.setDefaultCloseOperation(3);
jf.add(cg);
}
}
等等。
Every startup needs a steady diet of funding to keep it strong and growing. Datadog, a monitoring service that helps customers bring together data from across a variety of infrastructure and software is no exception. Today it announced a massive $94.5 million Series D Round. The company would not discuss valuation.