What are the differences between JFrame and JDialog in Java?\\n

JFrame

• The components added to the frame are referred to as its contents, these are managed by the contentPane. To add a component to a JFrame, we must use its contentPane instead.
• A JFrame contains a window with title, border, (optional) menu bar and user-specified components.
• A JFrame can be moved, resized, iconified and it is not a subclass of JComponent.
• By default, JFrame is displayed in the upper-left corner of the screen. To display a frame at a specified location, we can use the setLocation(x, y) method in the JFrame class.

Example

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class JFrameDemo {    public static void main(String s[]) {       JFrame frame = new JFrame("JFrame Demo");       frame.addWindowListener(new WindowAdapter() {          public void windowClosing(WindowEvent e) {             System.exit(0);          }       });       JLabel lbl = new JLabel("JFrame Demo");       lbl.setPreferredSize(new Dimension(175, 100));       frame.getContentPane().add(lbl, BorderLayout.CENTER);       frame.setSize(375, 275);       frame.setVisible(true);    } }

Output

JDialog

• The JDialog is very similar to a JFrame except that the JDialog can be set modally. Modal means that no other window can be used or activated while the corresponding JDialog is being displayed.
• Modal dialogs block input to other top-level windows and Modeless dialogs allow input to other windows.
• Unlike JFrame, JDialog does not hold minimize and maximize buttons at the top right corner of the window.

Example

import javax.swing.JDialog; import javax.swing.JLabel; public class JDialogDemo extends JDialog {    public static void main(String[] args) {       try {          JDialogDemo dialog = new JDialogDemo();          dialog.setVisible(true);       } catch (Exception e) {          e.printStackTrace();       }    }      public JDialogDemo() {       setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);       setTitle("Welcome to Tutorials Point");       setBounds(100, 100, 359, 174);       getContentPane().setLayout(null);       JLabel label = new JLabel("Welcome to Tutorials Point");       label.setBounds(86, 37, 175, 29);       getContentPane().add(label);    } }

Output