在 JFrame 中平稳移动 JLabel

Question

I am trying to make a Slot Machine with a JFrame .

How do I move my JLabel with a smooth animation? What I have tried is that I am increasing the delay in the loop with every round, but that is to slow.

It should move at the beginning very fast and getting at the end very slow.

Maybe anyone can help me to calculate the smooth better?

Here is my code of my Animation class extending Thread :

JLabel label; // thre Jlabel
int labelPosY, maxHeight; // label Y position and all Y positions in summary

Animate(JLabel label, int labelPosY, int maxHeight)
{
    this.label = label;
    this.labelPosY = labelPosY;
    this.maxHeight = maxHeight; // for example: -6500
}

public void run()
{
    int smooth; // smooth

    for (int i = this.maxHeight; i <= 0; i++)
    {
        try
        {
            smooth = 100 - (Math.abs(i) / (Math.abs(this.maxHeight) / 100)); // getting percentage of whole moving process

            Layout.setLabelPosY(this.label, this.labelPosY++); // changes Y position of JLabel

            Thread.sleep(smooth); // waits the always changing process (1ms - 100ms)
        }
        catch (InterruptedException e) {e.printStackTrace();}
    }
}

Image

Answer 1

Here's one way to create a slot machine GUI in Java Swing.

1. Download slot machine images, like this one. You can find many other images with Google.

2. Read the image file from a properties folder in your Java project into a BufferedImage .

3. Divide the BufferedImage into individual BufferedImage s. With this image, that would be 9 individual BufferedImage s.

4. Create a BufferedImage strip that's one image wide by nine images high.

5. Create the rotating image of a slot machine by animating the rotation of three or four copies of the BufferedImage strip. You draw this image on a JPanel in the JFrame .

6. Keep track of the money spent and winnings on a control JPanel in the JFrame . The spin JButton would also be placed on the control JPanel .