Here is the standard coordinate layout of containers in Java. The origin is at top left. Additionally, when you specify the location of a component or draw a figure such as an oval or rectangle, the bounds that describe the component placement or figure use the same coordinate system. So a circle would extend down and to the right from its specified (x,y) location.
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这是Java中容器的标准坐标布局。起源在左上。此外，当您指定组件的位置或绘制椭圆形或矩形等图形时，描述组件放置或图形的边界使用相同的坐标系。因此，一个圆将向下延伸，并从其指定的
（x，y）位置向右延伸。Here is the standard coordinate layout of containers in Java. The origin is at top left. Additionally, when you specify the location of a component or draw a figure such as an oval or rectangle, the bounds that describe the component placement or figure use the same coordinate system. So a circle would extend down and to the right from its specified
(x,y)location.