RMI Remote Method Invocation

import java.rmi.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class BankClient extends JFrame implements ActionListener,ItemListener
{
static MyRemote1  obj;
 JTextField t1,t2;
 JButton b1;
 JLabel l1,l2,l3;
 JPanel p1,p2,p3,mp;
 JComboBox cb;
 int bal=0,amt=0;
 public BankClient()
  {
 t1=new JTextField(20);
      t2=new JTextField(20);
      b1=new JButton("Do");
      b1.addActionListener(this);
      l1=new JLabel("Amount");
      l2=new JLabel("Mode");
      l3=new JLabel("Balance");
      cb=new JComboBox();
       cb.addItem("Deposit");
       cb.addItem("Withdraw");
       cb.addItemListener(this);
      p1=new JPanel();
      p1.add(l1);
      p1.add(t1);
      p2=new JPanel();
      p2.add(l2);
      p2.add(cb);
      p2.add(b1);
      p3=new JPanel();
      p3.add(l3);
      p3.add(t2);
      mp=new JPanel(new GridLayout(3,1));
     mp.add(p1);
     mp.add(p2);
     mp.add(p3);
     Container ct=getContentPane();
     ct.setLayout(new FlowLayout());
     ct.add(mp);
     setTitle("Demo");
     setSize(400,400);
      setVisible(true);
    }
    int l;
        public void itemStateChanged(ItemEvent ie)
    {
l=cb.getSelectedIndex();
}
  public void actionPerformed(ActionEvent ae)
  {
    if(l==0)
      {
  try
  {
   amt=Integer.parseInt(t1.getText());
   obj.deposit(amt);
bal=obj.getbalance();
t2.setText(""+bal);
}
catch(Exception e)
{
}
}
if(l==1)
      {
  try
  {
   amt=Integer.parseInt(t1.getText());
   obj.withdraw(amt);
bal=obj.getbalance();
t2.setText(""+bal);
}
catch(Exception e)
{
JOptionPane.showMessageDialog(this,"Balance is not enough.");
}

}
}
 public static void main(String args[])
 {
   try
   {
   obj=(MyRemote1)Naming.lookup("rmi://localhost:1099/OBJ2");
   System.out.println("Calling remote methods");
    new BankClient();
   }catch(Exception e)
     {
       System.out.println("Error in lookup"+e);
       }
       }
}import java.rmi.*;
import java.rmi.server.*;
public class BankServer extends UnicastRemoteObject implements MyRemote1
{
public BankServer(String nm)throws RemoteException
{
 try
 {
    Naming.bind(nm,this);
   System.out.println("Object binded here.......");
   }catch(Exception e)
     {
      System.out.println("Error in binding"+e);
      }
  }
      int bal=0;
      public void deposit(int amt) throws RemoteException
      {
      bal=bal+amt;
       }
      public void withdraw(int amt) throws RemoteException
            {
if(bal-amt<500 p=""> {
throw new RemoteException();
   }else
   {
bal=bal-amt;
     }
  }
      public int getbalance() throws RemoteException
            {
            return (bal);
      }

      public static void main(String arg[])throws RemoteException
      {
       new BankServer("OBJ2");
       System.out.println("Server started here");
       }
       }import java.rmi.*;
public class MyClient
{
 public static void main(String arg[])
 {
   try
   {
   MyRemote  obj=(MyRemote)Naming.lookup("rmi://localhost:1099/OBJ1");
   System.out.println("Calling remote methods");
   int a=20,b=5,c=0;
   c=obj.add(a,b);
   System.out.println("Addition of"+a+" and "+b+"  is "+c);
   c=obj.sub(a,b);
   System.out.println("Substraction of"+a+" and "+b+"  is "+c);
   c=obj.multi(a,b);
   System.out.println("Multiplication of"+a+" and "+b+"  is "+c);
   c=obj.div(a,b);
   System.out.println("division of"+a+" and "+b+"  is "+c);
   }catch(Exception e)
     {
       System.out.println("Error in lookup"+e);
       }
       }
       }import java.rmi.*;
public interface MyRemote extends Remote
{
public int add(int a,int b)throws RemoteException;
public int sub(int a,int b)throws RemoteException;
public int multi(int a,int b)throws RemoteException;
public int div(int a,int b)throws RemoteException;
}import java.rmi.*;
public interface MyRemote1 extends Remote
{
public void deposit(int amt)throws RemoteException;
public void withdraw(int amt)throws RemoteException;
public int getbalance()throws RemoteException;

}import java.rmi.*;
import java.rmi.server.*;
public class MyServer extends UnicastRemoteObject implements MyRemote
{
public MyServer(String nm)throws RemoteException
{
 try{
   Naming.bind(nm,this);
   System.out.println("Object binded here.......");
   }catch(Exception e)
     {
      System.out.println("Error in binding"+e);
      }
  }
      public int add(int a,int b) throws RemoteException
      {
      return (a+b);
      }
      public int sub(int a,int b) throws RemoteException
            {
            return (a-b);
      }
      public int multi(int a,int b) throws RemoteException
            {
            return (a*b);
      }
      public int div(int a,int b) throws RemoteException
            {
            return (a/b);
      }
      public static void main(String arg[])throws RemoteException
      {
       new MyServer("OBJ1");
       System.out.println("Server started here");
       }
       }import java.sql.*;
import java.awt.*;
import java.io.*;
import javax.swing.*;
import javax.swing.table.*;
import java.awt.event.*;
import java.util.*;
public class SalsClient extends JFrame implements ActionListener
{
static SalsRemote obj;
 Connection con;
  ResultSet rs;
 Statement st;
ResultSetMetaData rsmd;
 JLabel l1,l2;
 JTable jtab;
 JScrollPane jsp;
 JTextField t1;
 JButton b_execute;
 JPanel p1,p2,mp;
 Vector head,row,data;
 public SalsClient()
 {
  l1=new JLabel("SQL");
  l2=new JLabel("Details are");
   t1=new JTextField(20);
  b_execute=new JButton("Execute");
  b_execute.addActionListener(this);
  p1=new JPanel();
  jtab=new JTable();
  int vsp=ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS;
  int hsp=ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS;
  jsp=new JScrollPane(jtab,vsp,hsp);

  p1.add(l1);
  p1.add(t1);
  p1.add(b_execute);
  p2=new JPanel();
  p2.add(l2);
  p2.add(jsp);
  mp=new JPanel();
 Container ct=getContentPane();

      ct.add(p1,BorderLayout.NORTH);
      ct.add(p2,BorderLayout.CENTER);
        setTitle("Demo");
          setSize(550,400);
         setVisible(true);

  try{

   Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
   con=DriverManager.getConnection("jdbc:odbc:abc","scott","tiger");
JOptionPane.showMessageDialog(this,"Database Connected");
  }catch(Exception e)
      {
    JOptionPane.showMessageDialog(this,"Error in connection"+e);
      }
}
    public Vector displayData(String query)
    {


  try{
 st=con.createStatement();
 rs=st.executeQuery(query);
rsmd=rs.getMetaData();
 int cols=rsmd.getColumnCount();
 head=new Vector();
 for(int i=1;i<=cols;i++)
  {
  head.add(rsmd.getColumnName(i));
  }
  data=new Vector();
  data.add(head);
  while(rs.next())
  {
  row=new Vector();
for(int i=1;i<=cols;i++)
  {
  row.add(rs.getString(i));
  }
  data.add(row);
  }

 }catch(Exception e)
 {
 head=new Vector();
 head.add("No data found");
 data=new Vector();
 data.add(head);
      }
      return data;
}


   public void actionPerformed(ActionEvent ae)
      {
 if(ae.getSource()==b_execute)
 {
              obj.

}
}

  public static void main(String arg[])
  {
 try
 {
 obj=(SalsRemote)Naming.lookup("rmi://localhost:1099/OBJ3");
 System.out.println("Calling remote methods");

    new SalsClient();
    }
    catch{}
}
}
import java.rmi.*;
public interface SalRemote extends Remote
{
public vector getData(String query) throws RemoteException;
}