How to use

java.awt.Dimension

constructor

 JFrame frame = new JFrame("test");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
JPanel panel = new JPanel(new GridLayout(4,4,4,4));

for(int i=0 ; i<16 ; i++){
  JButton btn = new JButton(String.valueOf(i));
  btn.setPreferredSize(new Dimension(40, 40));
  panel.add(btn);
}
frame.setContentPane(panel);
frame.pack();
frame.setVisible(true);

 import java.awt.Dimension;

import javax.swing.JFrame;

public class JFrameExample {
  public static void main(String[] args) {
    JFrame frame = new JFrame("Hello World");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setMinimumSize(new Dimension(100, 100));
    frame.setVisible(true);
  }
}

public static void main(final String[] args) {
  final JFrame j = new OSMMapTilePackagerUI();
  j.setPreferredSize(new Dimension(640, 400));
  j.setDefaultCloseOperation(EXIT_ON_CLOSE);
  j.pack();
  j.setVisible(true);
}

textPane.setBorder(BorderFactory.createEmptyBorder(15, 15, 15, 15));
textPane.setLayout(new BoxLayout(textPane, BoxLayout.PAGE_AXIS));
textPane.add(Box.createRigidArea(new Dimension(0, 10)));
textPane.add(name);
textPane.add(Box.createRigidArea(new Dimension(0, 10)));
textPane.add(desc);
textPane.add(Box.createRigidArea(new Dimension(0, 10)));
textPane.add(version);
textPane.add(Box.createRigidArea(new Dimension(0, 20)));
contentPane.add(textPane, BorderLayout.CENTER);
contentPane.add(close, BorderLayout.PAGE_END);

private void createDebug() {
  frame = new JFrame("Smack Debug Window");
  versionPanel.setMaximumSize(new Dimension(2000, 31));
  versionPanel.add(new JLabel(" Smack version: "));
  JFormattedTextField field = new JFormattedTextField(SmackConfiguration.getVersion());
  frame.getContentPane().add(tabbedPane);

  public void run(){
    JFrame frame = new JFrame("Render Display");
    display = new ImageDisplay();
    display.setPreferredSize(new Dimension(width, height));
    frame.getContentPane().add(display);
    frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
    frame.addWindowListener(new WindowAdapter(){
      public void windowClosed(WindowEvent e){
        stop();
      }
    });
    frame.pack();
    frame.setLocationRelativeTo(null);
    frame.setResizable(false);
    frame.setVisible(true);
  }
});

getContentPane().add(
  descriptionPanel,
  new GridBagConstraints(0, 0, 2, 1, 1.0, 0.0, GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0,
getContentPane().add(
  panel,
  new GridBagConstraints(0, 1, 1, 1, 1.0, 1.0, GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(5, 5, 0,
getContentPane().add(
  buttonPanel,
  new GridBagConstraints(0, 2, 2, 1, 0.0, 0.0, GridBagConstraints.EAST, GridBagConstraints.NONE,
setSize(new Dimension(320, 175));

 JFrame frame = new JFrame("Colored Trails");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
firstPanel.setMaximumSize(new Dimension(400, 400));
JButton btn;
for (int i=1; i<=4; i++) {
  for (int j=1; j<=4; j++) {
    btn = new JButton();
    btn.setPreferredSize(new Dimension(100, 100));
    firstPanel.add(btn);
secondPanel.setMaximumSize(new Dimension(520, 200));
for (int i=1; i<=5; i++) {
  for (int j=1; j<=13; j++) {
    btn = new JButton();
    btn.setPreferredSize(new Dimension(40, 40));
    secondPanel.add(btn);
frame.setMinimumSize(new Dimension(520,600));
frame.setVisible(true);

playerWindow = new JFrame(title);
playerWindow.getContentPane().add(player.getVideoComponent());
playerWindow.setMinimumSize(new Dimension(320, 240));
playerWindow.pack();
playerWindow.setVisible(true);

return new Dimension(image.getWidth(), image.getHeight());
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new TextOverlay());
f.pack();
f.setVisible(true);

getContentPane().add(
  descriptionPanel,
  new GridBagConstraints(0, 0, 2, 1, 1.0, 0.0, GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0,
getContentPane().add(
  panel,
  new GridBagConstraints(0, 1, 1, 1, 1.0, 1.0, GridBagConstraints.CENTER, GridBagConstraints.NONE, new Insets(5, 5, 0,
getContentPane().add(
  buttonPanel,
  new GridBagConstraints(0, 2, 2, 1, 0.0, 0.0, GridBagConstraints.EAST, GridBagConstraints.NONE,
setSize(new Dimension(320, 175));

private void createAndShowGUI() {
 //Make sure we have nice window decorations.
 JFrame.setDefaultLookAndFeelDecorated(true);
 //Create and set up the window.
 frame = new JFrame("Stanford Named Entity Recognizer");
 frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
 frame.getContentPane().setLayout(new BorderLayout());
 frame.getContentPane().setPreferredSize(new Dimension(WIDTH, HEIGHT));
 frame.setJMenuBar(addMenuBar());
 buildTagPanel();
 buildContentPanel();
 buildExtractButton();
 extractButton.setEnabled(false);
 extract.setEnabled(false);
 //Display the window.
 frame.pack();
 frame.setVisible(true);
}

final JFrame frame = new JFrame("Nested Layout Example");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
plafComponents.add(plafChooser);
plafComponents.add(pack);
      SwingUtilities.updateComponentTreeUI(frame);
      if (pack.isSelected()) {
        frame.pack();
        frame.setMinimumSize(frame.getSize());
gui.add(plafComponents, BorderLayout.NORTH);
Dimension tablePreferred = tableScroll.getPreferredSize();
tableScroll.setPreferredSize(
  new Dimension(tablePreferred.width, tablePreferred.height/3) );
frame.pack();
frame.setVisible(true);

getContentPane().add(cp, BorderLayout.NORTH);
final JScrollPane scrollPane = new JScrollPane(table);
scrollPane.setBorder(BorderFactory.createTitledBorder("Events: "));
scrollPane.setPreferredSize(new Dimension(900, 300));
details.setPreferredSize(new Dimension(900, 300));
getContentPane().add(jsp, BorderLayout.CENTER);

private void createRuleXML() {
  CreateXMLRulePanel rulePanel = new CreateXMLRulePanel(xpathQueryArea, codeEditorPane);
  JFrame xmlframe = new JFrame("Create XML Rule");
  xmlframe.setContentPane(rulePanel);
  xmlframe.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
  xmlframe.setSize(new Dimension(600, 700));
  xmlframe.addComponentListener(new java.awt.event.ComponentAdapter() {
    @Override
    public void componentResized(ComponentEvent e) {
      JFrame tmp = (JFrame) e.getSource();
      if (tmp.getWidth() < 600 || tmp.getHeight() < 700) {
        tmp.setSize(600, 700);
      }
    }
  });
  int screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
  int screenWidth = Toolkit.getDefaultToolkit().getScreenSize().width;
  xmlframe.pack();
  xmlframe.setLocation((screenWidth - xmlframe.getWidth()) / 2, (screenHeight - xmlframe.getHeight()) / 2);
  xmlframe.setVisible(true);
}

final JFrame frame = new JFrame();
frame.setPreferredSize(new Dimension(600, 400));
final JToolBar toolBar = new JToolBar();
toolBar.add(button);
frame.getContentPane().add(toolBar, BorderLayout.NORTH);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null);
frame.setVisible(true);

jPanel3.add(jLabel1);
urlTextField.setMinimumSize(new java.awt.Dimension(100, 20));
urlTextField.setPreferredSize(new java.awt.Dimension(300, 20));
urlTextField.getDocument().addDocumentListener(new DocumentListener() {
 public void changedUpdate(DocumentEvent e) {
getContentPane().add(jPanel1, java.awt.BorderLayout.NORTH);
getContentPane().add(jPanel2, java.awt.BorderLayout.SOUTH);

this.setPreferredSize(new Dimension(SIZE, SIZE));
this.n = n;
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new CircleTest(9));
f.pack();

return new Dimension(PREF_W, PREF_H);
JFrame frame = new JFrame("DrawGraph");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);

  protected ShutdownWindow() {
    JLabel shutdownLabel = new JLabel("Shutting down, please wait...");
    shutdownLabel.setHorizontalAlignment(JLabel.CENTER);
    getContentPane().add(shutdownLabel);
    setPreferredSize(new Dimension(300, 30));
    pack();
    Application.center(this);
  }
}