有没有一种有效的方法可以在我的游戏中连续创建更多矩形?

Question

我正在尝试制作一个名为"jump it"(http://www.crazygames.com/game/jump-it(的java GUI游戏版本。我目前正在为我的角色绘制随机矩形。但是，我不知道如何连续绘制更多矩形，因为我对 GUI 相当陌生。所以我的代码在下面，希望你们能帮助我！

class BtnActPanel extends JPanel implements 
ActionListener{
private int x = 0,  
x1 = 650,  
y2 = (int)(Math.random()*100)+40,  
y1 = (int)(Math.random()*100)+450,  
x2 = (int)(Math.random()*600)+200;
.
.
.
}
public void actionPerformed(ActionEvent e) {
.
.
.
else  if (e.getSource() == b3){
JOptionPane.showMessageDialog(null, "This is an exit button, hope you enjoyed the game! :)", "Exit message",JOptionPane.WARNING_MESSAGE ); //shows exit message
System.exit(0);//exits program
} 
else if (e.getSource() == t){
if (index == 0){
index = 1;
c = arrImage[1];
}
else{
index = 0;
c = arrImage[0];
}
x = x-10;
x1 = x1-10;
repaint();
}   
}
public void paintComponent(Graphics g){//this method draws and paints images and icons based on the user decisions
super.paintComponent(g);
if(check1 == 0)
g.drawImage(icon.getImage(),0,0,null);
if(check1 == 1){
g.drawImage(b.getImage(),0,0,null);
g.setColor(Color.black);
g.fillRect(x,495, 500, 35);
g.fillRect(x1, y1, x2, y2);
g.drawImage(c.getImage(), 100, 460, null);
}
if(check1 == 2)
g.drawImage(instruct.getImage(),0,0,null);
b1.setBounds(320, 350, 100, 100);
b2.setBounds(420, 350, 100, 100);
b3.setBounds(520, 350, 100, 100);
}

}//课程结束

Answer 1

您可以设置计时器或在循环中生成一些计时器。

您可以根据需要调整阈值。

static Random r = new Random();
static int upperX = 100;
static int lowerX = 20;
static int upperY = 100;
static int lowerY = 50;
static int minWidth = 100;
static int maxWidth = 300;
static int minHeight = 50;
static int maxHeight = 200;
public static Rectangle newRect() {
// All ranges inclusive of thresholds
int x = r.nextInt(upperX-lowerX + 1) + lowerX; // from 20 to 100
int y = r.nextInt(upperY-lowerY + 1) + lowerY; // from 50 to 100
int w = r.nextInt(maxWidth-minWidth + 1) + minWidth; // from 100 to 300
int h = r.nextInt(maxHeight - minHeight + 1) + minHeight; // from 50 to 200
return new Rectangle(x,y,w,h);
}