How To Create Dialog Box In Java

Java Swing | JDialog with examples

JDialog is a part Java swing package. The main purpose of the dialog is to add components to it. JDialog can be customized according to user need .
Constructor of the class are:

JDialog() : creates an empty dialog without any title or any specified owner
JDialog(Frame o) :creates an empty dialog with a specified frame as its owner
JDialog(Frame o, String s) : creates an empty dialog with a specified frame as its owner
and a specified title
JDialog(Window o) : creates an empty dialog with a specified window as its owner
JDialog(Window o, String t) : creates an empty dialog with a specified window as its owner and specified title.
JDialog(Dialog o) :creates an empty dialog with a specified dialog as its owner
JDialog(Dialog o, String s) : creates an empty dialog with a specified dialog as its owner and specified title.

Commonly used methods

Attention reader! Don't stop learning now. Get hold of all the important Java Foundation and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready. To complete your preparation from learning a language to DS Algo and many more, please refer Complete Interview Preparation Course .

setLayout(LayoutManager m) : sets the layout of the dialog to specified layout manager
setJMenuBar(JMenuBar m) : sets the menubar of the dialog to specified menubar
add(Component c): adds component to the dialog
isVisible(boolean b): sets the visibility of the dialog, if value of the boolean is true then visible else invisible
update(Graphics g) : calls the paint(g) function
remove(Component c) : removes the component c
getGraphics() : returns the graphics context of the component.
getLayeredPane() : returns the layered pane for the dialog
setContentPane(Container c) :sets the content pane for the dialog
setLayeredPane(JLayeredPane l) : set the layered pane for the dialog
setRootPane(JRootPane r) : sets the rootPane for the dialog
getJMenuBar() : returns the menubar of the component
setTransferHandler(TransferHandler n) : Sets the transferHandler property, which is a mechanism to support transfer of data into this component.
setRootPaneCheckingEnabled(boolean enabled) : Sets whether calls to add and setLayout are forwarded to the contentPane.
setRootPane(JRootPane root) :Sets the rootPane property of the dialog.
setGlassPane(Component glass) : Sets the glassPane property of the dialog.
repaint(long time, int x, int y, int width, int height): Repaints the specified rectangle of this component within time milliseconds.
remove(Component c): Removes the specified component from the dialog.
isRootPaneCheckingEnabled() : Returns whether calls to add and setLayout are forwarded to the contentPane or not .
getTransferHandler() : returns the transferHandler property.
getRootPane() : Returns the rootPane object for this dialog.
getGlassPane() : Returns the glassPane object for this dialog.
createRootPane() : Called by the constructor methods to create the default rootPane.
addImpl(Component co, Object c, int i) : Adds the specified child Component to the dialog.

The following programs will illustrate the use of JDialog
1 .Program to create a simple JDialog

Java

import java.awt.event.*;

import java.awt.*;

import javax.swing.*;

class solve extends JFrame implements ActionListener {

static JFrame f;

public static void main(String[] args)

{

f = new JFrame( "frame" );

solve s = new solve();

JPanel p = new JPanel();

JButton b = new JButton( "click" );

b.addActionListener(s);

p.add(b);

f.add(p);

f.setSize( 400 , 400 );

f.show();

}

public void actionPerformed(ActionEvent e)

{

String s = e.getActionCommand();

if (s.equals( "click" )) {

JDialog d = new JDialog(f, "dialog Box" );

JLabel l = new JLabel( "this is a dialog box" );

d.add(l);

d.setSize( 100 , 100 );

d.setVisible( true );

}

Output:

2. Program to create a dialog within a dialog

Java

import java.awt.event.*;

import java.awt.*;

import javax.swing.*;

class solve extends JFrame implements ActionListener {

static JFrame f;

static JDialog d, d1;

public static void main(String[] args)

{

f = new JFrame( "frame" );

solve s = new solve();

JPanel p = new JPanel();

JButton b = new JButton( "click" );

b.addActionListener(s);

p.add(b);

f.add(p);

f.setSize( 400 , 400 );

f.show();

}

public void actionPerformed(ActionEvent e)

{

String s = e.getActionCommand();

if (s.equals( "click" )) {

d = new JDialog(f, "dialog Box" );

JLabel l = new JLabel( "this is first dialog box" );

JButton b = new JButton( "click me" );

b.addActionListener( this );

JPanel p = new JPanel();

p.add(b);

p.add(l);

d.add(p);

d.setSize( 200 , 200 );

d.setVisible( true );

}

else {

d1 = new JDialog(d, "dialog Box" );

JLabel l = new JLabel( "this is second dialog box" );

d1.add(l);

d1.setSize( 200 , 200 );

d1.setLocation( 200 , 200 );

d1.setVisible( true );

}

Output :

Note : The above programs might not run in an online compiler please use an offline IDE