Question

my problem is, that when I create a JButton, whithin its constructor, I set its location to some relative coordinates, say x = 5, and y = 6, using the following code:

this.setLocation(new Point(x, y));

but after I am trying to get its location using the getLocation() method, it always returns 0,0. Please note that this happens for every JButton I am trying to place on a grid layout powered JFrame, and during the debugging process, I have also noted that their location is being properly instantiated.

Can someone explain to me why this happens, and if I can fix it somehow?

EDIT:

The constructor (The brick class that I made, extends JButton):

public Brick(int posx, int posy) {
        this.setLocation(new Point(posx, posy));
        this.setVisible(true);
    }

I make about 100+ of them in 2 for loops:

   for (int row = 0; row < 15; row++) {
    for (int column = 0; column < 15; column++) {
    Brick brickie = new Brick(row, column);
    }
   }

But afterwards, if I wanna pick a brick and check its location like this:

Point brickLocation = brickie.getLocation();

both brickLocation.x == 0 and brickLocation.y == 0

Answer 1

You are trying to change button location when it is automatically assigned by layout manager (your GridLayout). That is why you are always getting the same value back – layout just overwrites it.

To be able to change any component bounds/location (including buttons) manually – you have to set “null” as the container’s layout. After that just change the location/size/bounds as you like and it will affect the components positions.

Also you don’t need to use “setVisible(true)” – by default that flag is true for all components (even those that aren’t displayed yet).