Java – how to rotate an image based on two points

I have some images I manipulate. In these images, I always have two points (x1, Y1) and (X2, Y2) like this:

|----------------|
|                |
|    .           |
|                |
|          .     |
|                |
|----------------|

I need to write an algorythm code to align the images

|----------------|
|                |
|                |
|    .     .     |
|                |
|                |
|----------------|

I have read this question, but get the angle

double angle = Math.atan2(pointB.Y - pointA.Y,pointB.X - pointA.X);

When I use this rotation code in Java, it doesn't work:

public static BufferedImage tilt(BufferedImage image,double angle) {
    double sin = Math.abs(Math.sin(angle)),cos = Math.abs(Math.cos(angle));
    int w = image.getWidth(),h = image.getHeight();
    int neww = (int) Math.floor(w * cos + h * sin),newh = (int) Math
            .floor(h * cos + w * sin);
    GraphicsConfiguration gc = getDefaultConfiguration();
    BufferedImage result = gc.createCompatibleImage(neww,newh,Transparency.OPAQUE);
    Graphics2D g = result.createGraphics();

    g.setColor(Color.white);
    g.setBackground(Color.white);
    g.fillRect(0,neww,newh);

    g.translate((neww - w) / 2,(newh - h) / 2);

    g.rotate(angle,w / 2,h / 2);
    g.draWrenderedImage(image,null);
    g.dispose();
    return result;
}

In the posts mentioned earlier, they used c# code and so on

myImage.TranslateTransform(-pointA.X,-pointA.Y);
myImage.RotateTransform((float) angle,MatrixOrder.Append);
myImage.TranslateTransform(pointA.X,pointA.Y,MatrixOrder.Append);

Can anyone help with the Java implementation of this case?

Solution

Ok... To solve this problem, I just put math The radian value returned by atan2 is converted to degrees, and the rotation effect is very good

hello everyone