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graphics.drawRect()方法

drawRect方法的官方API文档描述

drawRectpublic void drawRect(int x,                     int y,                     int width,                     int height)Draws the outline of the specified rectangle. The left and right edges of the rectangle are at x and x + width. The top and bottom edges are at y and y + height. The rectangle is drawn using the graphics contexts current color.Parameters:x - the x coordinate of the rectangle to be drawn.y - the y coordinate of the rectangle to be drawn.width - the width of the rectangle to be drawn.height - the height of the rectangle to be drawn.

width和height的描述是错误的。

实践告诉我们,width,height参数应该是右下角的点的坐标。

graphics.drawRect()方法