有没有一种简单的方法来绘制一个给定边框厚度的矩形呢?
如果你正在 Graphics2D 对象上进行绘制,你可以使用 setStroke()
方法:
Graphics2D g2;
double thickness = 2;
Stroke oldStroke = g2.getStroke();
g2.setStroke(new BasicStroke(thickness));
g2.drawRect(x, y, width, height);
g2.setStroke(oldStroke);
如果这是在Swing组件上进行的,并且您被传递了一个Graphics
对象,您可以将其向下转换为Graphics2D
。Graphics2D g2 = (Graphics2D) g;
以下是如何做到这一点:使用厚度为5的有色线框绕边。
Border linebor = BorderFactory.createLineBorder(new Color(0xAD85FF), 5);
**Tested code with buffered image with different thickness values**:
Graphics2D g = bufferedImage.createGraphics();
int height = //image height
int width = //image height
int borderWidth = //border thickness
int borderControl = 1;
//set border color
g.setColor(Color.BLACK);
//set border thickness
g.setStroke(new BasicStroke(borderWidth));
//to fix issue for even numbers
if(borderWidth%2 == 0){
borderControl = 0;
}
g.drawLine(0, 0, 0, height);
g.drawLine(0, 0, width, 0);
g.drawLine(0, height – borderControl, width, height – borderControl);
g.drawLine(width – borderControl, height – borderControl, width – borderControl, 0);