在Java中设置自定义游标的大小

Question

I have customized a cursor on a label component called ageLabel using the following code

ageLabel.setCursor(Toolkit.getDefaultToolkit().createCustomCursor(new javax.swing.ImageIcon(getClass().getResource("/images/image1.jpg")).getImage(),new Point(5,5),"custom cursor"));

It works fine anyway but what I want to do is increase the size of the customized cursor. I have tried changing the point to (10,10) but the cursor size wouldn't change. I also tried changing the dimensions of the image that I used ,it still wouldn't change. I have searched through the internet but to no avail. Is It possible to resize the cursor in anyway? If it is how do I do that? Thanks in advance for all helps.

Answer 1

Java's Image class has a built in function for scaling.

Documentation: https://docs.oracle.com/javase/7/docs/api/java/awt/Image.html#getScaledInstance(int,%20int,%20int)

My approach to the problem:

1. Split the line up into many to make it look a bit nicer (not necessary).
2. Add an extra method call to scale the image up.

Potential Solution:

    URL imageResource = getClass().getResource("/images/image1.jpg");
    ImageIcon imageIcon = new ImageIcon(imageResource);
    Image image = imageIcon.getImage();

    // This is the important line that scales the image up!
    Image scaledImage = image.getScaledInstance(newWidth, newHeight, Image.SCALE_DEFAULT);

    Toolkit toolkit = Toolkit.getDefaultToolkit();
    Cursor cursor = toolkit.createCustomCursor(scaledImage, new Point(5, 5), "Custom Cursor");
    ageLabel.setCursor(cursor);

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Afterthoughts:

Remember to replace newWidth and newHeight with the values you want.

After you get it working, I'd even go further and extract some of this code into methods.

You might need to tweak your imports a bit if it isn't compiling.

I haven't tried running this code so I don't know if it works.