/* public class HelloJava { public static void main( String[] args ) { System.out.println("Hello, Java!"); } } public class HelloJava { public static void main( String[] args ) { javax.swing.JFrame frame = new javax.swing.JFrame( "Hello, Java!" ); frame.setSize( 300, 300 ); frame.setVisible( true ); } } import javax.swing.*; public class HelloJava { public static void main( String[] args ) { JFrame frame = new JFrame( "HelloJava" ); JLabel label = new JLabel("Hello, Java!", JLabel.CENTER ); frame.getContentPane().add( label ); frame.setSize( 300, 300 ); frame.setVisible( true ); } } */ import javax.swing.*; public class HelloJava { public static void main( String[] args ) { JFrame frame = new JFrame( "HelloJava" ); frame.add( new HelloComponent() ); frame.setSize( 300, 300 ); frame.setVisible( true ); } } class HelloComponent extends JComponent { public void paintComponent( java.awt.Graphics g ) { g.drawString( "Hello, Java!", 125, 95 ); } }