Advance JAVA Technology TUTORIAL:1 R.K.University

TUTORIAL : 1

1. Create a simple applet.
2. Write an applet that used adapter class to implement mouse event.
3. Create a simple swing applet.
4. Create a simple swing frame.
5. Create swing applet that contain text field, password field and command button.
6. Create a simple swing applet that demonstrate checkbox and radio button.
     

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Create a simple swing applet that demonstrate checkbox and radio button

           import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

/*

<applet code="box" width=400 height=400>

                        </applet>

*/

public class box extends JApplet implements ItemListener

            {

                                    Container c;

                                    JLabel l1,l2;

JCheckBox c1,c2,c3;

                 JRadioButton r1,r2,r3;

                                    ButtonGroup bg;

public void init()

{

                                    c=this.getContentPane();

                                    c.setLayout(new FlowLayout());

            c1=new JCheckBox("Red");

                                     c.add(c1);

                             c2=new JCheckBox("Green");

                                     c.add(c2);

                                    c3=new JCheckBox("Blue");

                                     c.add(c3);       

                                     l1=new JLabel();

                                    c.add(l1);

c1.addItemListener(this);

                                     c2.addItemListener(this);

                                     c3.addItemListener(this);

                                     l2=new JLabel();

                                     c.add(l2);

                                     r1=new JRadioButton("Red");

                                     c.add(r1);

                                     r2=new JRadioButton("Green");

                                     c.add(r2);

                                     r3=new JRadioButton("Blue");

                                     c.add(r3);

                                     bg=new ButtonGroup();

                                     bg.add(r1);

                                     bg.add(r2);

                                     bg.add(r3);

                                    r1.addItemListener(this);

                                     r2.addItemListener(this);

                                     r3.addItemListener(this);

}

public void itemStateChanged(ItemEvent ie)

                         {

                                    if(ie.getSource()==c1)

                                    l1.setText("Red is marked");

                                    if(ie.getSource()==c2)

                                    l1.setText("Green is marked");

                                    if(ie.getSource()==c3)

                                    l1.setText("Blue is marked");

                                    if(ie.getSource()==r1)

                                    l2.setText("Red is marked");

                                    if(ie.getSource()==r2)

                                    l2.setText("Green is marked");

                                    if(ie.getSource()==r3)

                                    l2.setText("Blue is marked");

                         }

        }

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Create swing applet that contain text field, password field and command button

          import java.applet.Applet;

          import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

/*

<applet code="login" width=200 height=200>

                        </applet>

*/

public class login extends JApplet  

            {

                        Container c;

                        JLabel j1,j2;

                        JTextField t1,t2,t3;

                        JPasswordField p1;

                        JButton b1,b2;

            public void init()

{

                        c=this.getContentPane();

                        c.setLayout(new GridLayout(4,1));

                        j1=new JLabel("user name:");

                        c.add(j1);

t2=new JTextField();

                        c.add(t2);

j2=new JLabel("Password:");

                        c.add(j2);

p1=new JPasswordField();

                        c.add(p1);

b1=new JButton("OK");

                        c.add(b1);

                        b2=new JButton("Cancel");

                        c.add(b2);

        }

  }

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Create a simple swing frame

import javax.swing.*;

import java.awt.*;

import java.applet.*;

import java.awt.event.*;

    public class ws extends JFrame

    {

         Container c;

         public ws(String title)

          {

               super("Frame");

               c=this.getContentPane();

               c.setBackground(Color.pink);

               setSize(300,400);

               addWindowListener(new f1());

               setDefaultCloseOperation(DISPOSE_ON_CLOSE);

               show();

          }

        class f1 extends WindowAdapter

          {

                 public void windowClosed(WindowEvent e)

                        {

                                 System.exit(0);

                        }

          }

                public static void main(String args[])

                        {

                                  ws w=new ws("frame 1");

                        }        

}

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Create a simple swing applet

            import java.awt.*;

            import java.applet.*;

            import java.awt.event.*;

            import javax.swing.*;

            /*

                 <applet code="sw" height=300 width=300>

                 </applet>

            */

              public class sw extends JApplet

              {

                   JLabel l1;

                   Container c;

                        public void init()

                         {

                                      c=this.getContentPane();

                                      l1=new JLabel("this is label");

                                     c.add(l1);

                         }           

              }

 

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