Re: Output to the frame

From:
"Andrew Thompson" <u32984@uwe>
Newsgroups:
comp.lang.java.help
Date:
Mon, 09 Apr 2007 16:49:12 GMT
Message-ID:
<7074134970bfc@uwe>
Ravi wrote:

import java.awt.*;

..

The frame added lasts covers the whole window. Please help by
correcting my code.


A bit of an expansion/refinement on what Liz
mentioned.

<sscce>
import java.awt.*;

class LogInAWT {

  public static void main(String args[]) {

    Frame f = new Frame("Private");
    TextField t1 = new TextField(10);
    TextField t2 = new TextField(10);
    t2.setEchoChar('*');

    Label l1 = new Label("Name");
    Label l2 = new Label("Password");

    Button bLogIn = new Button("Log In");

    Panel pLabel = new Panel( new GridLayout(0,1) );
    Panel pText = new Panel( new GridLayout(0,1) );
    Panel pButton = new Panel();

    pLabel.add(l1);
    pLabel.add(l2);

    pText.add(t1);
    pText.add(t2);

    pButton.add(bLogIn);

    // not needed, not robust.
    // see 'pack()' below.
    // f.setSize(400,400);

    f.add(pLabel, BorderLayout.WEST);
    f.add(pText, BorderLayout.CENTER);
    f.add(pButton, BorderLayout.SOUTH);

    f.setLocationRelativeTo( null );

    f.pack();

    f.setVisible(true);
  }
}
</sscce>

But why AWT? Here is a close Swing variant.

<sscce>
import java.awt.GridLayout;
import java.awt.BorderLayout;
import javax.swing.*;
import javax.swing.border.EmptyBorder;

class LogInSwing {

  public static void main(String args[]) {

    JFrame f = new JFrame("Private");
    JTextField t1 = new JTextField(10);
    // JPasswordField automatically hides text
    JPasswordField t2 = new JPasswordField(10);

    JLabel l1 = new JLabel("Name");
    JLabel l2 = new JLabel("Password");

    JButton bLogIn = new JButton("Log In");

    EmptyBorder border =
      new EmptyBorder(3,10,1,10);
    JPanel pLabel = new JPanel(
      new GridLayout(0,1,10,10) );
    pLabel.setBorder(border);
    JPanel pText = new JPanel(
      new GridLayout(0,1,10,10) );
    pText.setBorder(border);
    JPanel pButton = new JPanel();

    pLabel.add(l1);
    pLabel.add(l2);

    pText.add(t1);
    pText.add(t2);

    pButton.add(bLogIn);

    f.add(pLabel, BorderLayout.WEST);
    f.add(pText, BorderLayout.CENTER);
    f.add(pButton, BorderLayout.SOUTH);

    f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
    f.setLocationRelativeTo( null );

    f.pack();

    f.setVisible(true);
  }
}
</sscce>

HTH

--
Andrew Thompson
http://www.athompson.info/andrew/

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