Pass by value or pass by reference?

These two have me very confused. I really have no idea how to figure this out when looking at code. Will someone please tell me if the following code uses pass by value or pass by reference and explain to me how they know?

[CODE]import java.awt.Point;
class PassMe
{
public static void modifyPoint(Point pt, int j)
{
pt.setLocation(5,5); //1
j = 15;
System.out.println(“During modifyPoint ” + “pt = ” + pt +
” and j = ” + j);
}
public static void main(String args[])
{
Point p = new Point(0,0); //2
int i = 10;
System.out.println(“Before modifyPoint ” + “p = ” + p +
” and i = ” + i);
modifyPoint(p, i); //3
System.out.println(“After modifyPoint ” + “p = ” + p +
” and i = ” + i);

}
}[/CODE]

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