How to use

pack

method

in

java.awt.Window

$cat HelloWorldSwing.java
 package start;
 import javax.swing.*;
 public class HelloWorldSwing {
   public static void main(String[] args) {
     //Create and set up the window.
     JFrame frame = new JFrame("HelloWorldSwing");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     JLabel label = new JLabel("Hello World");
     frame.add(label);
     //Display the window.
     frame.pack();
     frame.setVisible(true);
   }
 }
 class Dummy {
   // just to have another thing to pack in the jar
 }

 import javax.swing.*;

public class BoxLayoutFoo extends JFrame {
  public BoxLayoutFoo() {

   // swap the comments below
   setLayout(new BoxLayout(this, BoxLayout.LINE_AXIS)); // comment out this line
   //setLayout(new BoxLayout(getContentPane(), BoxLayout.LINE_AXIS)); // uncomment this line

   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   pack();
   setVisible(true);
  }

  public static void main(String[] args) {
   new BoxLayoutFoo();
  }
}

 import java.awt.event.*;
import javax.swing.*;

public class YourDialog extends JDialog implements ActionListener {

 JButton button;

 public YourDialog() {
   button = new JButton("Close");
   button.addActionListener(this);
   add(button);
   pack();
   setVisible(true);
 }

 public void actionPerformed(ActionEvent e) {
   dispose();
 }
}

 import javax.swing.JFrame;
import javax.swing.JLabel;

public class AnotherJFrame extends JFrame
{
  public AnotherJFrame()
  {
    super("Another GUI");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    add(new JLabel("Empty JFrame"));
    pack();
    setVisible(true);
  }
}

 import javax.swing.JFrame;
import javax.swing.JLabel;

public class Annoying {
  public static void main(String[] args) {
    JFrame frame = new JFrame("Hello!!");

    // Set's the window to be "always on top"
    frame.setAlwaysOnTop( true );

    frame.setLocationByPlatform( true );
    frame.add( new JLabel("  Isn't this annoying?") );
    frame.pack();
    frame.setVisible( true );
  }
}

 package com.stackoverflow.test;

import java.net.URL;
import javax.swing.*;  // Wild carded for brevity. 
            // Actual code imports single classes
public class Main {
  public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable(){
      public void run() {
        URL url = Main.class.getResource(
                   "/resources/stackoverflow.png");
        ImageIcon icon = new ImageIcon(url);
        JFrame frame = new JFrame();
        frame.add(new JLabel(icon));
        frame.pack();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
      }
    });
  }
}

 package temp;
import java.awt.EventQueue;
import javax.swing.JFrame;

public class Main {
  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      @Override
      public void run() {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new NewJPanel());
        f.pack();
        f.setVisible(true);
      }
    });
  }
}

JFrame f = new JFrame("Frame " + ii);
f.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
String s =
  "os.name: " + System.getProperty("os.name") +
  "\nos.version: " + System.getProperty("os.version");
f.add(new JTextArea(s,3,28));  // suggest a size
f.pack();
f.setVisible(true);

JLabel javaHomeLabel = new JLabel("java.home=" + System.getProperty("java.home"));
setLayout(new BorderLayout());
add(versionLabel, BorderLayout.PAGE_START);
add(javaHomeLabel, BorderLayout.PAGE_END);
JFrame frame = new JFrame("MyJavaMacOSXApp");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
MyJavaMacOSXApp newContentPane = new MyJavaMacOSXApp();
newContentPane.setOpaque(true); 
frame.setContentPane(newContentPane);
frame.pack();
frame.setVisible(true);

 import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;

public class Main{
  public static void main( String [] args ) throws InterruptedException  {
    JFrame frame = new JFrame();
    frame.add( new JLabel(" Outout" ), BorderLayout.NORTH );

    JTextArea ta = new JTextArea();
    TextAreaOutputStream taos = new TextAreaOutputStream( ta, 60 );
    PrintStream ps = new PrintStream( taos );
    System.setOut( ps );
    System.setErr( ps );


    frame.add( new JScrollPane( ta )  );

    frame.pack();
    frame.setVisible( true );

    for( int i = 0 ; i < 100 ; i++ ) {
      System.out.println( i );
      Thread.sleep( 500 );
    }
  }
}

this.add(combo1);
this.add(combo2);
combo1.addActionListener(this);
JFrame f = new JFrame("ComboTest");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);

JFrame frame = new JFrame();
frame.getContentPane().add(box);
frame.pack();
frame.setVisible(true);

JFrame frame = new JFrame("test");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTextArea textArea = new JTextArea(24, 80);
textArea.setFont(new Font("monospaced", Font.PLAIN, 12));
frame.add(new JScrollPane(textArea));
frame.pack();
frame.setVisible(true);

+ "The effect we want is a multi-line label.";
JFrame f = new JFrame("Label Render Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JLabel imageLabel = new JLabel(ii);
f.getContentPane().add(imageLabel);
f.pack();
f.setLocationByPlatform(true);
f.setVisible(true);

JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(new TextOverlay());
f.pack();
f.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);
frame.pack();
frame.setLocationRelativeTo(null);
try {
frame.setVisible(true);

 package experiments;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JOptionPane;

public class CreateDialogFromOptionPane {

  public static void main(final String[] args) {
    final JFrame parent = new JFrame();
    JButton button = new JButton();

    button.setText("Click me to show dialog!");
    parent.add(button);
    parent.pack();
    parent.setVisible(true);

    button.addActionListener(new java.awt.event.ActionListener() {
      @Override
      public void actionPerformed(java.awt.event.ActionEvent evt) {
        String name = JOptionPane.showInputDialog(parent,
            "What is your name?", null);
      }
    });
  }
}

for (int r = 0; r < N; r++) {
  for (int c = 0; c < N; c++) {
    this.add(create(r + N, r + 1, c + 2));
JFrame f = new JFrame("HTMLFractions");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(this);
f.pack();
f.setLocationRelativeTo(null);
f.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);

JFrame f = new JFrame();
setTranslucency( f );
f.setUndecorated( true );
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setBackground(new Color(0f, 0f, 0f, 1f / 3f));
f.add(new Translucent());
f.pack();
f.setVisible(true);