就是 setTitle( "Welcome" ); 这一句为什么不显示呢~???
// Tutorial 2: Welcome.java
// This application welcomes the user to Java programming.
import java.awt.*;
import javax.swing.*;public class Welcome extends JFrame
{
private JLabel textJLabel; // JLabel that displays text
private JLabel pictureJLabel; // JLabel that displays an image // no-argument constructor
public Welcome()
{
createUserInterface();
} // create and position GUI components; register event handlers
private void createUserInterface()
{
// get content pane and set layout to null
Container contentPane = getContentPane();
contentPane.setLayout( null );
// set up textJLabel
textJLabel = new JLabel();
contentPane.add( textJLabel );
// set up pictureJLabel
pictureJLabel = new JLabel();
contentPane.add( pictureJLabel ); // set properties of application's window
setTitle( "Welcome" );
setSize( 100, 100 ); // set width and height of JFrame
setVisible( true ); // display JFrame on screen } // end method createUserInterface // main method
public static void main( String[] args )
{
Welcome application = new Welcome();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } // end method main} // end class Welcome
// Tutorial 2: Welcome.java
// This application welcomes the user to Java programming.
import java.awt.*;
import javax.swing.*;public class Welcome extends JFrame
{
private JLabel textJLabel; // JLabel that displays text
private JLabel pictureJLabel; // JLabel that displays an image // no-argument constructor
public Welcome()
{
createUserInterface();
} // create and position GUI components; register event handlers
private void createUserInterface()
{
// get content pane and set layout to null
Container contentPane = getContentPane();
contentPane.setLayout( null );
// set up textJLabel
textJLabel = new JLabel();
contentPane.add( textJLabel );
// set up pictureJLabel
pictureJLabel = new JLabel();
contentPane.add( pictureJLabel ); // set properties of application's window
setTitle( "Welcome" );
setSize( 100, 100 ); // set width and height of JFrame
setVisible( true ); // display JFrame on screen } // end method createUserInterface // main method
public static void main( String[] args )
{
Welcome application = new Welcome();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE ); } // end method main} // end class Welcome
===
哪爽?