我设计了一个程序,该程序输出1x1矩形(我将从现在开始称其为Pixels),其颜色在红色,绿色和蓝色之间的随机变量之间随机分配。现在,我想更进一步。首先,这是来源:
public class GUI extends JPanel {
private final static int MAX_X = 1920;
private final static int MAX_Y = 1080;
public void paintComponent(Graphics g) {
super.paintComponent(g);
for (int x = 0; x < MAX_X; x++) {
for (int y = 0; y < MAX_Y; y++) {
Color randomColor = Color.BLACK; //Black because it wouldn't work uninitialized.
//Slightly inefficient?
int number; Random rColor = new Random();
number = rColor.nextInt(3);
if(number == 0){randomColor = Color.RED;}
else if(number ==1){randomColor = Color.GREEN;}
else if(number == 2){randomColor = Color.BLUE;}
g.setColor(randomColor); //Red, Blue, or Green. Depends on if number is 0, 1 or 2.
g.drawRect(x, y, 1, 1);
}
}
}
}
它可以正常工作,并且像我期望的那样工作。这是下一个挑战:如何使它们不断变化?我想要的是,如果相邻像素为蓝色,而不是像素为绿色,然后任何绿色变为红色,红色变为蓝色。我不确定当前的设置是否可行。
旁注:我有一种方法可以将我在注释中标记为“稍微低效”的几行代码最小化为更干净的内部参数。我查找文档已有一段时间,但找不到Random的更多功能。
您可以使用计时器进行更改。例如:使用以下代码修改gui类,请参阅。此计时器每半秒运行一次,并重新绘制jpanel。您可以将500更改为所需的毫秒。它看起来像这样。
您不需要每次都创建一个新的随机数。 randomnumber.nextInt就足够了,您可以将数字作为实例
public class GUI extends JPanel {
private final static int MAX_X = 200;
private final static int MAX_Y = 150;
private final Color RED = Color.RED, GREEN = Color.GREEN, BLUE = Color.BLUE;
private final Random rColor = new Random();
private int number;
private Color randomColor;
public GUI() {
new Timer(1, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
repaint();
}
}).start();
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
for (int x = 0; x < MAX_X; x++) {
for (int y = 0; y < MAX_Y; y++) {
number = rColor.nextInt(3);
if (number == 0) { randomColor = RED;
} else if (number == 1) { randomColor = GREEN;
} else if (number == 2) {randomColor = BLUE;
}
g.setColor(randomColor);
g.drawRect(x, y, 1, 1);
}
}
}
}