The lines should go top right corner, where (a,0) is. I couldn't work it out. I'm using Eclipse 3.65.
public class Ikibin extends JFrame{
int a = 400;
int b = 600;
public Ikibin()
{
setTitle("Tutorial");
setSize(a,b);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public void paint(Graphics g)
{
g.setColor(Color.blue);
g.drawLine(0, 0, 0, b);
g.drawLine(a/4, 0, a/4, b);
g.drawLine(a/2, 0, a/2, b);
g.drawLine(3*a/4, 0, 3*a/4, b);
g.drawLine(0, 0, a, 0);
g.drawLine(0, b/4, a, 0);
g.drawLine(0, b/2, a, 0);
g.drawLine(0, 3*b/4, a, 0);
}
public static void main (String [] args)
{
Ikibin i = new Ikibin();
}
}