Java Tutorial/Swing/No Layout

Laying Out Components Using Absolute Coordinates

   <source lang="java">

import javax.swing.JButton; import javax.swing.JPanel; public class Main {

 public static void main(String[] argv) throws Exception {
   JButton component = new JButton();
   JPanel panel = new JPanel(null);
   component.setBounds(1, 1, 100, 100);
   panel.add(component);
 }

}</source>

No LayoutManager: Absolute positioning

To absolute positioning components, passing null to the setLayout method of a container.

   <source lang="java">

import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JTextField; public class NoLayoutTest extends JFrame {

 public static void main(String[] args) {
   JFrame.setDefaultLookAndFeelDecorated(true);
   JFrame frame = new JFrame("NoLayout Test");
   frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   frame.setLayout(null);
   JLabel label = new JLabel("First Name:");
   label.setBounds(20, 20, 100, 20);
   JTextField textField = new JTextField();
   textField.setBounds(124, 25, 100, 20);
   frame.add(label);
   frame.add(textField);
   frame.setSize(300, 100);
   frame.setVisible(true);
 }

}</source>

Without layout manager, we position components using absolute values.

   <source lang="java">

import javax.swing.JButton; import javax.swing.JFrame; public class Absolute {

 public static void main(String[] args) {
   JFrame f = new JFrame();
   f.setLayout(null);
   JButton ok = new JButton("OK");
   ok.setBounds(50, 150, 80, 25);
   JButton close = new JButton("Close");
   close.setBounds(150, 150, 80, 25);
   f.add(ok);
   f.add(close);
   f.setSize(300, 250);
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   f.setVisible(true);
 }

}</source>

Z Order

   <source lang="java">

import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class ZOrder extends JPanel {

 public static void main(String[] args) {
   JFrame f = new JFrame();
   f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
   f.setContentPane(new ZOrder());
   f.setSize(400, 300);
   f.setVisible(true);
 }
 public ZOrder() {
   setLayout(null);
   JButton first = new JButton("This button is added first");
   first.setBounds(20, 50, 200, 30);
   add(first);
   JButton second = new JButton("This button is added second");
   second.setBounds(120, 65, 200, 30);
   add(second);
 }

}</source>