size of button in java

Question

I want to control size of button , I use Method setBounds But there is no change and this my code

       public class levels extends JFrame implements ActionListener{

 //Variables 
private static JLabel chooseLevel;
private static JButton easyPuzzle;
private static JButton mediumPuzzle;
private static JButton hardPuzzle;
 // End Of Variables 

this main cod

public static void main(String[]args){

levels level = new levels();
level.setBounds(400, 190, 450, 450);
level.setVisible(true); // frame is visible
level.setResizable(false); // not Resizable frame 
level.setTitle("Puzzle Number : New Game");  // Title Of the frame

Container to add components

   Container cN = level.getContentPane(); //  Container to add components for farme 1
   GridLayout gN = new GridLayout(0,1,10,20); //object from GridLayout
   cN.setLayout(gN);

   levels.chooseLevel = new JLabel("              Choose a level :");
   levels.easyPuzzle = new JButton("Easy puzzle from ( 1 - to -15)");
   levels.mediumPuzzle = new JButton("Medium Puzzle from (1- to- 29)");
   levels.hardPuzzle = new JButton("Hard Puzzle from (1- to- 59)");

    //add components for frame

     cN.add(chooseLevel);
     cN.add(easyPuzzle);
     cN.add(mediumPuzzle);
     cN.add(hardPuzzle);
   }
   }
   }

Answer 1

The LayoutManager overrides the bounds you set many times, and this is the case with GridLayout.

I suggest you go through the layout managers tutorial.

Answer 2

Try using the setPreferredSize() method on the button, although the layout manager has the final word on what size is used in the end.