setSize ne pas influencer la taille du bouton

Question

J'ai un exemple de code:

import java.awt.*; 
import javax.swing.*; 
import javax.swing.border.BevelBorder; 

public class AWT extends JFrame { 

    public static void main(String[] args) { 
     final JFrame frame = new JFrame(); 
     frame.setPreferredSize(new Dimension(600, 450)); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
     frame.setBackground(Color.green.darker()); 

     Button btn_1 = new Button("Button 1"); 
     btn_1.setBackground(Color.green.darker()); 
     btn_1.setSize(40, 100); 
     Button btn_2 = new Button("Button 2"); 
     btn_2.setBackground(Color.green.darker()); 
     btn_2.setSize(40, 100); 
     Button btn_3 = new Button("Button 3"); 
     btn_3.setBackground(Color.green.darker()); 
     btn_3.setSize(40, 100); 

     JPanel players = new JPanel(new GridLayout(1, 3)); 
     players.add(btn_1); 
     players.add(btn_2); 
     players.add(btn_3); 
     players.setBackground(Color.green.darker()); 
     players.setPreferredSize(new Dimension(450, 80)); 

     JPanel game = new JPanel(); 
     game.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED)); 
     game.setBackground(Color.green); 
     game.setPreferredSize(new Dimension(600, 370)); 

     JPanel content = new JPanel(); 
     content.setLayout(new BorderLayout()); 
     frame.setContentPane(content); 
     content.add(players, BorderLayout.NORTH); 
     content.add(game, BorderLayout.SOUTH); 
     frame.pack(); 
frame.setVisible(true); 
    } 
} 

Cette suite me donne une telle fenêtre:

alt text http://img710.imageshack.us/img710/1573/21672037.gif

, alors qu'il devrait se traduire par quelque chose comme ceci:

alt text http://img686.imageshack.us/img686/8948/44650673.gif

Pourquoi ce n'est pas rendu de cette façon? Ignore la taille préférée des boutons.

Answer 1

GridLayout Replace

JPanel players = new JPanel(new GridLayout(1, 3)); 

avec

JPanel players = new JPanel(); // default FlowLayout 

Addendum: Voici un exemple connexe de laisser la mise en page et les tailles par défaut préférés faire le travail. En spécifiant le moins de contraintes possible, l'apparence s'adapte à l'apparence de chaque plate-forme & lorsque vous appelez pack().

import java.awt.*; 
import javax.swing.*; 
import javax.swing.border.BevelBorder; 

public class AWT extends JFrame { 

    public static void main(String[] args) { 
     final JFrame frame = new JFrame(); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     JPanel players = new JPanel(); 
     players.add(new GameButton("Button 1")); 
     players.add(new GameButton("Button 2")); 
     players.add(new GameButton("Button 3")); 
     players.setBackground(GameButton.color); 

     JPanel game = new JPanel(); 
     game.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED)); 
     game.setBackground(Color.green); 
     game.setPreferredSize(new Dimension(600, 450)); 

     JPanel content = new JPanel(); 
     content.setLayout(new BorderLayout()); 
     frame.setContentPane(content); 
     content.add(players, BorderLayout.NORTH); 
     content.add(game, BorderLayout.CENTER); 
     frame.pack(); 
     frame.setVisible(true); 
    } 

    private static class GameButton extends JButton { 

     private static final Color color = Color.green.darker(); 
     private static final Font font = new Font("SanSerif", Font.BOLD, 20); 
     private String name; 

     public GameButton(String name) { 
      super(name); 
      this.setBackground(color); 
      this.setFont(font); 
     } 
    } 
} 

Answer 2

1. GridLayout étend les compoments ajoutés directement à eux. J'utiliserais une autre mise en page, ou si vous voulez vraiment que GridLayout vérifie le code ci-dessous.

2. Vous devez également utiliser setPreferredSize sur les boutons! (Voir ci-dessous)

import java.awt.*; 

import javax.swing.*; 
import javax.swing.border.BevelBorder; 

public class AWT extends JFrame { 

public static void main(String[] args) { 
final JFrame frame = new JFrame(); 
frame.setPreferredSize(new Dimension(600, 450)); 
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
frame.setBackground(Color.green.darker()); 

Button btn_1 = new Button("Button 1"); 
btn_1.setBackground(Color.green.darker()); 
btn_1.setPreferredSize(new Dimension(40, 100)); 

Button btn_2 = new Button("Button 2"); 
btn_2.setBackground(Color.green.darker()); 
btn_2.setPreferredSize(new Dimension(40, 100)); 

Button btn_3 = new Button("Button 3"); 
btn_3.setBackground(Color.green.darker()); 
btn_3.setPreferredSize(new Dimension(40, 100));  

GridLayout layout = new GridLayout(1, 3); 
JPanel players = new JPanel(layout); 
JPanel cell1 = new JPanel(); 
cell1.add(btn_1); 
cell1.setBackground(Color.green.darker()); 
players.add(cell1); 
JPanel cell2 = new JPanel(); 
cell2.add(btn_2); 
cell2.setBackground(Color.green.darker()); 
players.add(cell2); 
JPanel cell3 = new JPanel(); 
cell3.add(btn_3); 
cell3.setBackground(Color.green.darker()); 
players.add(cell3); 
players.setBackground(Color.green.darker()); 
players.setPreferredSize(new Dimension(450, 80)); 

JPanel game = new JPanel(); 
game.setBorder(BorderFactory.createBevelBorder(BevelBorder.LOWERED)); 
game.setBackground(Color.green); 
game.setPreferredSize(new Dimension(600, 370)); 

JPanel content = new JPanel(); 
content.setLayout(new BorderLayout()); 
frame.setContentPane(content); 
content.add(players, BorderLayout.NORTH); 
content.add(game, BorderLayout.SOUTH); 
frame.pack(); 
frame.setVisible(true); 
} 
}