expandir jframe?

[owen]

hola a todos, miren tengo un problema cuando tengo un jframe supongamos de 300x300 todo lo que esta en su interior se ve tal como lo deje (en su posición) pero al expandirlo todo se me va ala esquina superior izquierda y lo que sobra queda gris. como puedo hacerlo para que todo se adapte según la pantalla? y no se desforme el jframe

[0xFer]

Pues la forma más fácil que conozco es usando layout, te te dejo un ejemplo sacado de stackoverflow

Código (java) [Seleccionar] Expandir

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.TextField;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.net.MalformedURLException;
import java.net.URL;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.SwingUtilities;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.StyledDocument;

public class DraftGUI implements MouseListener {

   private static final String IMAGE_URL = "http://images.paramountbusinessjets.com/space/spaceshuttle.jpg";
   private JPanel jpPack;
   private JPanel jpCards;
   private JPanel jpInfo;
   private JPanel jpChat;
   private TextField tf;
   private StyledDocument doc;
   private JTextPane tp;
   private JScrollPane sp;

   @Override
   public void mousePressed(MouseEvent e) {
   }

   @Override
   public void mouseReleased(MouseEvent e) {
   }

   @Override
   public void mouseEntered(MouseEvent e) {
   }

   @Override
   public void mouseExited(MouseEvent e) {
   }

   @Override
   public void mouseClicked(MouseEvent e) {
   }

   public DraftGUI() throws MalformedURLException {

       final JFrame frame = new JFrame("Draft");
       frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       // set the content pane, we'll add everything to it and then add it to the frame
       JPanel contentPane = new JPanel();
       contentPane.setLayout(new GridBagLayout());

       // creates some panels with some default values for now
       JPanel jpCards = new JPanel(new BorderLayout());
       jpCards.setBackground(Color.BLUE);

       JPanel jpInfo = new JPanel();
       jpInfo.setBackground(Color.GREEN);

       JPanel jpPack = new JPanel(new GridBagLayout());
       jpPack.setBackground(Color.RED);

       // grab some info to make the JTextPane and make it scroll
       tf = new TextField();
       doc = new DefaultStyledDocument();
       tp = new JTextPane(doc);
       tp.setEditable(false);
       sp = new JScrollPane(tp);

       // adding the quantities to the chat panel
       JPanel jpChat = new JPanel();
       jpChat.setLayout(new BorderLayout());
       jpChat.add("North", tf);
       jpChat.add("Center", sp);

       // a new GridBagConstraints used to set the properties/location of the panels
       GridBagConstraints c = new GridBagConstraints();

       // adding some panels to the content pane
       // set it to start from the top left of the quadrant if it's too small
       c.anchor = GridBagConstraints.FIRST_LINE_START;
       c.fill = GridBagConstraints.BOTH; // set it to fill both vertically and horizontally
       c.gridx = 0; // set it to quadrant x=0 and
       c.gridy = 0; // set it to quadrant y=0
       c.weightx = 0.7;
       c.weighty = 0.3;
       contentPane.add(jpCards, c);

       c.gridx = 1;
       c.gridy = 0;
       c.weightx = 0.3;
       c.weighty = 0.3;
       contentPane.add(jpInfo, c);

       c.gridx = 0;
       c.gridy = 1;
       c.weightx = 0.7;
       c.weighty = 0.7;
       contentPane.add(jpPack, c);

       c.gridx = 1;
       c.gridy = 1;
       c.weightx = 0.3;
       c.weighty = 0.7;
       contentPane.add(jpChat, c);

       // set some necessary values
       frame.setContentPane(contentPane);
       frame.setLocationByPlatform(true);

       // This code works for adding an Image
       // need to learn how to specify a path not dependent on the specific users's machine
       // this is not a high priority for now though
       GridBagConstraints d = new GridBagConstraints();
       d.weightx = 1.0;
       d.weighty = 1.0;
       d.fill = GridBagConstraints.BOTH;
       d.gridx = 0;
       d.gridy = 0;
       ImageLabel imageLabel1 = new ImageLabel(new ImageIcon(new URL(IMAGE_URL)));
       jpPack.add(imageLabel1, d);
       ImageLabel imageLabel2 = new ImageLabel(new ImageIcon(new URL(IMAGE_URL)));
       d.gridx++;
       jpPack.add(imageLabel2, d);

       ImageLabel imageLabel3 = new ImageLabel(new ImageIcon(new URL(IMAGE_URL)));
       d.gridy++;
       jpPack.add(imageLabel3, d);

       imageLabel1.addMouseListener(this);
       imageLabel2.addMouseListener(this);
       imageLabel3.addMouseListener(this);
       frame.pack();
       // 223, 310 are the aspect values for a card image, width, height
       // these need to be maintained as the GUI size changes
           frame.setExtendedState(frame.getExtendedState() | JFrame.MAXIMIZED_BOTH);
       frame.setVisible(true);
   }

   public static void main(String[] args) {
       SwingUtilities.invokeLater(new Runnable() {
           @Override
           public void run() {
               try {
                   new DraftGUI();
               } catch (MalformedURLException e) {
                   e.printStackTrace();
               }
           }
       });
   }

   public static class ImageLabel extends JPanel {
       private static int counter = 1;
       private ImageIcon icon;
       private int id = counter++;

       public ImageLabel(ImageIcon icon) {
           super();
           setOpaque(false);
           this.icon = icon;
       }

       @Override
       public Dimension getPreferredSize() {
           return new Dimension(icon.getIconWidth(), icon.getIconHeight());
       }

       @Override
       protected void paintComponent(Graphics g) {
           super.paintComponent(g);
           double zoom = Math.min((double) getWidth() / icon.getIconWidth(), (double) getHeight() / icon.getIconHeight());
           int width = (int) (zoom * icon.getIconWidth());
           int height = (int) (zoom * icon.getIconHeight());
           g.drawImage(icon.getImage(), (getWidth() - width) / 2, (getHeight() - height) / 2, width, height, this);
           g.setFont(g.getFont().deriveFont(36.0f));
           g.drawString(String.valueOf(id), getWidth() / 2, getHeight() / 2);
       }
   }
}

la otra forma es que sepas el tamaño del Frame en tiempo de ejecución y dependiendo de ese tamaño cambiar el tamaño y la ubicación de todos los componentes, pero para eso hay que hacer muchos cálculos a mano.

[owen]

gracias por responder!