13. Common properties for forms

• Default JFrame behavior:

  • When the user clicks Close button 'X', JFrame window becomes hidden, but the application keeps running.

• To allow window to close and exit the application,

  
      JFrame frame = new JFrame( "JFrame is me" );
      frame.setBounds( 0, 0, 400, 300 );
      frame.setDefaultCloseOperation( javax.swing.WindowConstants.EXIT_ON_CLOSE );
  
  

• To change the window title.

  
      frame.setTitle( "Celsius Converter App" );
  
  

• To make window fixed-size (non-resizable)

  
      frame.setResizable( false ); // default is true