我最初先用一个圆开始, 当按下启动按钮时, 圆必须缩到一个点, 如果在此过程中按下停止按钮, 它应该停止收缩进程。 如果按下启动按钮, 它必须继续收缩 。
一旦它缩小到一个点,它必须长回到一个圆圈,当点击时按钮必须同样响应。
我不确定如何利用在JAVA开展的行动来实施《增长()和减少()》。
我最初先用一个圆开始, 当按下启动按钮时, 圆必须缩到一个点, 如果在此过程中按下停止按钮, 它应该停止收缩进程。 如果按下启动按钮, 它必须继续收缩 。
一旦它缩小到一个点,它必须长回到一个圆圈,当点击时按钮必须同样响应。
我不确定如何利用在JAVA开展的行动来实施《增长()和减少()》。
如果您使用 < a href=> http://docs.oracle.com/javase/tuative/ ui/overview/intro.html" rel=“nofollow” > Swing , 您可以像一个盒子一样绘制圆圈。 这意味着您可以更改圆圈的大小, 并用一个偏差将其划到中心, 并在同一位置 :
public Circle {
private int x;
private int y;
private int size;
public void paint(Graphics g) {
g.drawOval(x + size/2, y + size/2, size, size);
}
public void grow(){
size++;
}
public void shrink(){
size--;
size = Math.max(size,1);
}
}
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