关于JAVA Graphics2D种drawLine方法参数说明

浅浅的花香味﹌ 2021-12-23 07:35 255阅读 0赞

记性总是不太好，容易忘事，一线线是由两点组成的，启点和终点，所有在drawLine方法中有四个参数来控制两点，参数如下：

/**
 * Draws a line, using the current color, between the points
 * <code>(x1, y1)</code> and <code>(x2, y2)</code>
 * in this graphics context's coordinate system.
 * @param x1 the first point's x coordinate.
 * @param y1 the first point's y coordinate.
 * @param x2 the second point's x coordinate.
 * @param y2 the second point's y coordinate.
 */
 public abstract void drawLine(int x1, int y1, int x2, int y2);

x1,y1,x2,y2代表的是啥？？时间久了特容易忘记。。做了个图片容易记住：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE3ODE1MjE_size_16_color_FFFFFF_t_70][]

在通过几个示例说明下：

# 1.绘制一条横线： #

graphics.drawLine(0, 0, 125, 0)

![20190625223334678.png][]

# 2.绘制一条竖线： #

graphics.drawLine(0, 0, 0, 125);

![20190625223535591.png][]

## 3.绘制一条斜线： ##

graphics.drawLine(0, 0, 250, 300);

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE3ODE1MjE_size_16_color_FFFFFF_t_70 1][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE3ODE1MjE_size_16_color_FFFFFF_t_70]: /images/20211223/2d66af22cbd1471a876df14950252894.png
[20190625223334678.png]: /images/20211223/127d9e8afdff42fe8c0f910b7989ba77.png
[20190625223535591.png]: /images/20211223/12cbcdc8e0534fe995f77498cbecaac1.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTE3ODE1MjE_size_16_color_FFFFFF_t_70 1]: /images/20211223/55c9dd9ec7e34c93bea2dc9cc720d468.png