1. Program to demonstrate Command Line Argument.

public class cla
{
 public static void main(String args[])
 {
  int a,b,c;
  a=Integer.parseInt(args[0]);
  b=Integer.parseInt(args[1]);
  c=a+b;
  System.out.println("the sum is "+c);
 }
}












2.Program to demonstrate BufferedReader Class.

import java.io.*;
public class io_test
{
 public static void main(String args[]) throws IOException
 {
  InputStreamReader ip=new InputStreamReader(System.in);
  BufferedReader br=new BufferedReader(ip);
  System.out.println("enter your name ");
  String s=br.readLine();
  System.out.println("your name is "+s);
  }
 }










3.Program to demonstrate Parameterized Constructor.

class Box{
double width;
double height;
double depth;

Box(double w,double h,double d)
{
 width=w;
 height=h;
 depth=d;
}
double volume(){
return width*height*depth;
}
}
class demo
{
 public static void main(String args[])
 {
  Box ob1=new Box(5,10,15);
  double vol;
  vol=ob1.volume();
  System.out.println("the volume of the box is "+vol);
 }
 }



4.Program to demonstrate Function overloading.

class overloading
{
 void test()
 { System.out.println("no parameters");
 }
 void test(int a)
 {System.out.println("single integer passed:a= "+a);
 }
 void test(int a,int b)
 {System.out.println("two integers passed:a= "+a+" b= "+b);
 }
 void test(double a)
 {
 System.out.println("double value passed:a= "+a);
 }
}

class overload
{
 public static void main(String args[])
 {
  overloading ob= new overloading();

  ob.test();
  ob.test(4);
  ob.test(7,9);
  ob.test(3.75);
 }
}





5.Program to demonstrate Inheritance.

class Room
{
 int length;
 int breadth;
 Room(int x,int y)
 { length=x;
   breadth=y;
  }
  int area()
  {
   return(length*breadth);
  }
}
class Bedroom extends Room
{
 int height;
 Bedroom(int x,int y,int z)
 { super(x,y);
   height=z;
  }
  int volume()
  { return(length*breadth*height);
  }
 }
 class inherit_demo
 {
  public static void main(String args[])
  {
   Bedroom room1=new Bedroom(14,12,10);
   int area=room1.area();
   int volume=room1.volume();
   System.out.println("Area ="+area);
   System.out.println("volume ="+volume);
  }
}



6.Program to demonstrate Exception Handling.

class excep
{
 public static void main(String args[])
 {
  int a=10,b=5,c=5;
  int x,y;
  try
  {
   x=a/(b-c);
  }
  catch(ArithmeticException e)
  { System.out.println("division by zero not allowed ");
  }
  y=a/(b+c);
  System.out.println("y= "+y);
}
}












7.Program to demonstrate Applets and Event Handling.

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
/* <applet code="add" width=250 height=200>
</applet>
*/
public class add extends Applet implements ActionListener
{
TextField t1,t2,t3;
Button b1;
public void init()
{
 t1=new TextField(5);
 t2=new TextField(5);
 t3=new TextField(5);
 b1=new Button("add");
 Label l1=new Label("enter first number  ",Label.LEFT);
 Label l2=new Label("   enter second number ",Label.LEFT);
 Label l3=new Label("   the sum is ",Label.LEFT);
 add(l1); add(t1);
 add(l2); add(t2);
 add(b1);
 add(l3); add(t3);

 b1.addActionListener(this);
}
public void actionPerformed(ActionEvent ae)
{
 if(ae.getSource()==b1)
 {
  int a=Integer.parseInt(t1.getText());
  int b=Integer.parseInt(t2.getText());
  t3.setText(String.valueOf(a+b));
 }
}
}















8.Program to demonstrate MouseEvents class.

import java.awt.*;
import java.awt.event.*;
import java.applet.*;

/*<applet code="MouseEvents" width=400 height=400>
</applet>
*/
public class MouseEvents extends Applet implements MouseListener,MouseMotionListener{
String msg=" ";
int mousex=0,mousey=0;

public void init()
{
addMouseListener(this);
addMouseMotionListener(this);
}
public void mouseClicked(MouseEvent me){
mousex=0;
mousey=20;
msg="mouse clicked";
repaint();
}
public void mouseEntered(MouseEvent me){
mousex=0;
mousey=20;
msg="mouse entered";
repaint();
}
public void mouseExited(MouseEvent me){
mousex=0;
mousey=20;
msg="mouse exited";
repaint();
}
public void mousePressed(MouseEvent me){
mousex=me.getX();
mousey=me.getY();
msg="down";
repaint();
}
public void mouseReleased(MouseEvent me){
mousex=me.getX();
mousey=me.getY();
msg="up";
repaint();
}
public void mouseDragged(MouseEvent me){
mousex=me.getX();
mousey=me.getY();
msg="*";
showStatus("dragging mouse at"+mousex+","+mousey);
repaint();
}
public void mouseMoved(MouseEvent me){
showStatus("moving mouse at "+me.getX()+","+me.getY());
repaint();
}
public void paint(Graphics g){
g.drawString(msg,mousex,mousey);
}
}

9.Program to demonstrate tabbedpane using swings.

import javax.swing.*;
/* <applet code="tabbedpane" width=400 height=200>
</applet>
*/
public class tabbedpane extends JApplet  {
public void init()
{  JTabbedPane jtp=new JTabbedPane();
   jtp.addTab("semester",new semesterpanel());
   jtp.addTab("course",new coursepanel());
   jtp.addTab("hobbies",new hobbiespanel());
   getContentPane().add(jtp);
 }
}
class semesterpanel extends JPanel{
public semesterpanel(){
 JButton b1=new JButton ("1st");
 add(b1);
 JButton b2=new JButton ("2st");
 add(b2);
 JButton b3=new JButton ("3rd");
 add(b3);
 JButton b4=new JButton ("4th");
 add(b4);
 }
 }
 class coursepanel extends JPanel{
 public coursepanel(){
 JCheckBox ch1=new JCheckBox("b.tech");
 add(ch1);

 JCheckBox ch2=new JCheckBox("bba");
 add(ch2);
 JCheckBox ch3=new JCheckBox("bca");
 add(ch3);
 JCheckBox ch4=new JCheckBox("bcom");
 add(ch4);

 }
 }

 class hobbiespanel extends JPanel{
 public hobbiespanel(){
 JComboBox cb=new JComboBox();


 cb.addItem("cricket");
 cb.addItem("music");
 cb.addItem("coin collection");
 add(cb);
 }
 }













10.Program to create a demo application form using swings.

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
/* <applet code="appform" height=300 width=300>
</applet>
*/
public class appform extends JApplet implements ActionListener
{
 JLabel l1,l2,l3,l4;
 JButton b1,b2;
 JTextField t1,t2,t3;
 JTextArea ta1;
 JRadioButton rb1,rb2;
 JComboBox cb;

 public void init()
 {
   try
   { SwingUtilities.invokeAndWait(new Runnable()
     {public void run()
      { createGUI();
      }
      });
    }
    catch(Exception e)
    { System.err.println("createGUI was not successfull");
    }
  }
  private void createGUI()
  {
   setLayout(new FlowLayout());
   l1=new JLabel("name");
   add(l1);
   t1=new JTextField(15);
   add(t1);

   l2=new JLabel("enter your address",JLabel.LEFT);
   add(l2);
   ta1=new JTextArea(10,20);
   add(ta1);

   l3=new JLabel("           select gender",JLabel.LEFT);
   add(l3);
   rb1=new JRadioButton("M");
   rb2=new JRadioButton("F");
   add(rb1);
   add(rb2);
   ButtonGroup bg=new ButtonGroup();
   bg.add(rb1);
   bg.add(rb2);
   l4=new JLabel("  choose your nation");
   add(l4);
   cb=new JComboBox();
   cb.addItem("india");
   cb.addItem("america");
   cb.addItem("italy");
   cb.addItem("australia");
   cb.addItem("russia");
   cb.addItem("germany");
   cb.addItem("others");
   add(cb);
   System.out.println("    ");
   b1=new JButton("submit");
   add(b1);
   b1.addActionListener(this);
  }
  public void actionPerformed(ActionEvent ae)
  {
   if(ae.getSource()==b1)
   {  JOptionPane.showMessageDialog(this,"your form has been submitted","successfull",JOptionPane.INFORMATION_MESSAGE);
   }
}
}


































11.Program to implement JTree.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
/*<applet code="jtree" height=200 width=300>
</applet>
*/
public class jtree extends JApplet{
JTree tr;
public void init()
{
Container contentpane=getContentPane();
contentpane.setLayout(new BorderLayout());
DefaultMutableTreeNode top=new DefaultMutableTreeNode("folder 1");

DefaultMutableTreeNode a=new DefaultMutableTreeNode("games");
top.add(a);
DefaultMutableTreeNode a1=new DefaultMutableTreeNode("cricket");
a.add(a1);
DefaultMutableTreeNode a2=new DefaultMutableTreeNode("football");
a.add(a2);

DefaultMutableTreeNode b=new DefaultMutableTreeNode("books");
top.add(b);
DefaultMutableTreeNode b1=new DefaultMutableTreeNode("allamaraju");
b.add(b1);
DefaultMutableTreeNode b2=new DefaultMutableTreeNode("e balaguruswamy");
b.add(b2);
DefaultMutableTreeNode b3=new DefaultMutableTreeNode("herbert schildt");
b.add(b3);

tr =new JTree(top);
contentpane.add(tr);
}
}










12. Program to implement Remote Method Invocation(RMI)
Product.java
import java.rmi.*;
public interface product extends Remote{
public String getname() throws RemoteException;
}

Productimpl.java
import java.rmi.*;
import java.rmi.server.*;
public class productimpl extends UnicastRemoteObject implements  product
{
public String name1;
productimpl(String name) throws RemoteException
{
name1=name;
}
public String getname()
{
return name1;
}
}
Productclient.java
import java.rmi.*;
import java.rmi.registry.*;
public class productclient
{
public static void main(String s[])
{
try
{
product p=(product)Naming.lookup("rmi://127.0.0.1:1099/java");
System.out.println("productname="+p.getname());
}
catch(Exception e)
{
System.out.println(e);
}
}
}
Productserver.java
import java.rmi.*;
import java.rmi.registry.*;
public class productserver
{
public static void main(String s[])
{
try{
LocateRegistry.getRegistry(1099);
productimpl p1 =new productimpl("java");
Naming.bind("java",p1);
}
catch(java.lang.Exception e)
{System.out.println(e);
}
}
}























13.Program to add two numbers using Remote Method Invocation.

Productadd.java
import java.rmi.*;
public interface productadd extends Remote{
public int add() throws RemoteException;
}
Productimpladd.java
import java.rmi.*;
import java.rmi.server.*;
public class productimpladd extends UnicastRemoteObject implements  productadd
{
public int x,y;
productimpladd(int x1,int y1) throws RemoteException
{
x=x1;
y=y1;
}
public int add()
{
return (x+y);
}}

Productclientadd.java
import java.rmi.*;
import java.rmi.registry.*;
public class productclientadd
{
public static void main(String s[])
{
try
{
productadd p=(productadd)Naming.lookup("rmi://127.0.0.1:1099/java");
System.out.println("output = "+p.add());
}
catch(Exception e)
{
System.out.println(e);
}
}
}

Productserveradd.java
import java.rmi.*;
import java.rmi.registry.*;
public class productserveradd
{
public static void main(String s[])
{
try{
LocateRegistry.getRegistry(1099);
productimpladd p1 =new productimpladd(6,5);
Naming.bind("java",p1);
}
catch(java.lang.Exception e)
{System.out.println(e);
}
}
}



13. Program to show the contents of a database table using JDBC.

import java.sql.*;
public class jdbcex
{ public static void main(String args[])
  {
   try
   {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con=DriverManager.getConnection("jdbc:odbc:g45","","");
    Statement st=con.createStatement();
    ResultSet rs=st.executeQuery("select * from g45");
     while(rs.next())
     { System.out.println(rs.getString(1)+"\t"+rs.getString(2));
     }
    }
    catch(Exception e)
    { System.out.println("the error has occurred: "+e);
    }
   }
}

14. Program to enter a row into the database table.

import java.sql.*;
public class jdbcex2
{ public static void main(String args[])
  {
   try
   {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con=DriverManager.getConnection("jdbc:odbc:g45","","");
    Statement st=con.createStatement();
    int n=st.executeUpdate("insert into g45 (Name,Roll_no) values('Gaurav Kalra',43)");
   ResultSet rs1=st.executeQuery("select * from g45");

     while(rs1.next())
     { System.out.println(rs1.getString(1)+"\t"+rs1.getString(2));
     }
    }
    catch(Exception e)
    { System.out.println("the error has occurred: "+e);
    }
   }
}


16. Program to update a database table in JDBC.

employee table

employee
emp_id	name	salary	address
e01	rajesh kumar	22000	delhi
e02	shekar kapur	25000	mumbai
e03	reena rai	20000	kolkata
e04	ahmed qureshi	18000	allahabad
e05	manish pandey	28000	delhi
e06	Gaurav Mishra	40000	noida


import java.sql.*;
public class jdbcup
{ public static void main(String args[])
  {
   try
   {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    String str="update employee set salary=29800 where emp_id='e01'";
    Connection con=DriverManager.getConnection("jdbc:odbc:g44","","");
    Statement st=con.createStatement();
    int n=st.executeUpdate(str);

   ResultSet rs1=st.executeQuery("select * from employee");

     while(rs1.next())
     { System.out.println(rs1.getString(1)+"\t"+rs1.getString(2)+"\t"+rs1.getString(3)+"\t"+rs1.getString(4));
     }
    }
    catch(Exception e)
    { System.out.println("the error has occurred: "+e);
    }
   }
}
















17.Program to implement Prepared Statement in JDBC.
import java.sql.*;
public class pst
{ public static void main(String args[])
  {
   try
   {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    String query="select * from employee where salary>20000";
    Connection con=DriverManager.getConnection("jdbc:odbc:g44","","");
    PreparedStatement pst=con.prepareStatement(query);
    ResultSet rs1=pst.executeQuery();

     while(rs1.next())
     { System.out.println(rs1.getString(1)+"\t"+rs1.getString(2)+"\t"+rs1.getString(3)+"\t"+rs1.getString(4));
     }
    }
    catch(Exception e)
    { System.out.println("the error has occurred: "+e);
    }
   }
}


 18. Program to update a database table in JDBC using Prepared Statement.

import java.sql.*;
public class psup
{
  public static void main(String args[])
  {
    try
    {
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     Connection con1=DriverManager.getConnection("jdbc:odbc:g44","","");
    Statement st1=con1.createStatement();

     String str="Select * from employee";
     String str1="update employee set salary=? where emp_id=? ";
     //int  n=st1.executeUpdate(str1);

     PreparedStatement pst=con1.prepareStatement(str1);
     pst.setString(1,"35000");
     pst.setString(2,"e04");
     pst.executeUpdate();
     pst.close();
     ResultSet rs=st1.executeQuery(str);


  //   System.out.println("Rows updated:= "+n);
     while(rs.next())
     { System.out.println(rs.getString(1)+"\t"+rs.getString(2)+"\t"+rs.getString(3)+"\t"+rs.getString(4));

     }

     con1.commit();
     con1.close();

    }
   catch(Exception e)
   { System.out.println("Error has occured :"+e);
   }
 }
}





















19.Program to implement scrollable Result set in JDBC.
import java.sql.*;
public class scrl
{
public static void main(String args[])
{

try {
    Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
    Connection con=DriverManager.getConnection("jdbc:odbc:g44","","");
    String s1,s2,s3;
    Statement stmt = con.createStatement(
    ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
    ResultSet rs = stmt.executeQuery("SELECT * FROM employee");
    System.out.println("Next()");
    while (rs.next()) {
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);
    }
    System.out.println("Previous()");
    while (rs.previous()) {
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);
    }

    System.out.println("First()");
    rs.first();
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);

    System.out.println("Last()");
    rs.last();
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);

    System.out.println("Absolute(2)");
    rs.absolute(2);
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);

    System.out.println("Relative(2)");
    rs.relative(2);
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);

    System.out.println("Relative(-1)");
    rs.relative(-1);
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);

    System.out.println("BeforeFirst()");
    rs.beforeFirst();
    rs.next();
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);
    System.out.println("AfterLast()");
    rs.afterLast();
    rs.previous();
    s1 = rs.getString(1);
    s2 = rs.getString(2);
    s3 = rs.getString(3);
    System.out.println(s1+"\t"+s2+"\t"+s3);


}
catch (Exception e)
{
 System.out.println(e);
}
}
}



20.Program to implement Updatable Result set in JDBC.

import java.sql.*;
public class update
{
  public static void main(String args[])
  {
    try
    {
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     Connection con1=DriverManager.getConnection("jdbc:odbc:g44","","");
     Statement st1=con1.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);

     String str="Select * from employee";
     ResultSet rs=st1.executeQuery(str);
    String s1,s2,s3,s4;
     int i=0;
     System.out.println("Before Update:-");

     while(rs.next())
     {
       s1=rs.getString(1);
       s2=rs.getString(2);
       s3=rs.getString(3);
       s4=rs.getString(4);
       if(s2.equals("reena rai"))
       { rs.updateString(2,"reena sharma");
         rs.updateRow();
       }

       System.out.println(++i+" "+s1+"\t"+s2+"\t"+s3+"\t"+s4);
     }
// go to last row to update
     rs.last();

     rs.updateString(1,"e06");
     rs.updateString(2,"vinay katiyar");
     rs.updateRow();
     System.out.println("\nAfter update:-");
     i=0;
     rs.beforeFirst();
     while(rs.next())
     { s1=rs.getString(1);
       s2=rs.getString(2);
       s3=rs.getString(3);
       s4=rs.getString(4);
       System.out.println(++i+" "+s1+"\t"+s2+"\t"+s3+"\t"+s4);
     }
     rs.close();
     con1.commit();
     con1.close();
   }
   catch(Exception e)
   { System.out.println("Error has occured :"+e);
   }
 }
}