I am using Windows forms, as I don't have an Java tools installed, but the idea is the same, you will just have to imagine that you are adding the JLabel instead of Buttons and that this is a JFrame or JWindow instead of a .NET Form.
The code should be something like this, if we assume a 800 x 800 pixel area to layout stuff on
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.Load += new EventHandler(Form1_Load);
}
void Form1_Load(object sender, EventArgs e)
{
int numberItems = 18;
int centreX = 400;
int centreY = 400;
double offset = Math.PI;
double step = Math.PI * 2 / numberItems;
Button b = null;
for (int i = 0; i < numberItems; i++)
{
b = new Button();
b.Width = 30;
b.Height = 30;
SetPosition(b, 370, offset, i, step);
this.Controls.Add(b);
}
b = new Button();
b.Width = 30;
b.Height = 30;
b.Location = new Point(centreX, centreY);
this.Controls.Add(b);
}
private void SetPosition(Button button, int legLength, double offset, double posOffSet, double step)
{
int x = (int)(legLength + Math.Sin(offset + posOffSet * step) * legLength);
int y = (int)(legLength + Math.Cos(offset + posOffSet * step) * legLength);
button.Location = new Point(x, y);
}
}