JLable text Horizontal and Vertical Alignment

Horizontal Alignment 

Text Alignment Rigth

JLabel label1 = new JLabel("BottomRight", SwingConstants.RIGHT);

Text Alignment Left (It is by default)

JLabel label2 = new JLabel("CenterLeft", SwingConstants.LEFT);

Text Alignment Center

JLabel label3 = new JLabel("TopCenter", SwingConstants.CENTER);

Vertical Alignment

Text Alignment Bottom

label1.setVerticalAlignment(SwingConstants.BOTTOM);

Text Alignment Center vertically

label2.setVerticalAlignment(SwingConstants.CENTER);

Text Alignment Top

label3.setVerticalAlignment(SwingConstants.TOP);

Null Layout Manager (swing)

Layout Managers are used in the orginization of Panels and Frames. The proper layout should be chosen to accomodate, frame resizings and use.

Null:
*No Layout, items must be manually positioned and arranged.
This layout should only be used if the window will not and cannot be resized, as the item in the window will stay where they are placed, be that hidden or clumped in one corner of a window.

CODE example:

import java.awt.event.*;

import javax.swing.*;

public class NullLayoutExample extends JFrame {

       public NoLayoutExample(String name) {

              super(name);

              JTextField newItemField;

              JList itemsList;

              JButton addButton;

              JButton removeButton;

              getContentPane().setLayout(null);

              //The text field

              newItemField = new JTextField();

              newItemField.setLocation(12,12);

              newItemField.setSize(150,30);

              getContentPane().add(newItemField);

              //The Add button

              addButton = new JButton(“Add”);

              addButton.setMnemonic(‘A’);

              addButton.setLocation(174, 12);

              addButton.setSize(100,30);

              getContentPane().add(addButton);

              //The List

              itemsList = new JList();

              JScrollPane scrollPane = new JScrollPane(itemsList,

              ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,

              ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED);

              scrollPane.setLocation(12,45);

              scrollPane.setSize(150,150);

              getContentPane().add(scrollPane);

              //The Remove button

              removeButton = new JButton(“Remove”);

              removeButton.setMnemonic(‘R’);

              removeButton.setLocation(174,45);

              removeButton.setSize(100,30);

              getContentPane().add(removeButton);

       }

       public static void main(String[] args) {

              JFrame frame = new NoLayoutExample(“NULL Example”);

              frame.setDefaultCloseOperation(EXIT_ON_CLOSE);

              frame.setSize(286, 230);

              frame.setResizable(false);

              frame.setVisible(true);

       }

}

Swing Components look,feel like other OS components

system default:
javax.swing.UIManager.setLookAndFeel(javax.swing.UIManager.getSystemLookAndFeelClassName());

windows:
javax.swing.UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");

motif:
javax.swing.UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");