Bank Application in java

import java.util.*;

public class BankAccount 

{

Scanner sc=new Scanner(System.in);

 String name;

 int accno;

 int y;

 float r,i,t,bal,amt;

void getdata(String name,int accno)

   {

  this.name=name;

  this.accno=accno;

   }

 float deposit()

   {

System.out.print("enter amount to deposit");

amt=sc.nextFloat();

if(amt<0)

 {

System.out.print("Please re-enter amount to deposit");

    return 1;

 }

bal=bal+amt;

 return 0;

   }

 void display()

 {

 System.out.println(name);

 System.out.println(accno);

 System.out.println(bal);

 }

 }

class Current extends BankAccount

{ 

float withdraw()

   {

 System.out.print("enter amount to withdraw");

 amt=sc.nextFloat();

 if(bal<amt)

 {

 System.out.print("insufficient balance");

 return 1;

 }

 bal=bal-amt;

 return 0;

   }

}

class Saving extends BankAccount{

float interest()

 {

 if(bal!=0)

 {

   System.out.print("enter amount years and rate");

// a=sc.nextFloat();

   y=sc.nextInt();

    r=sc.nextFloat();

    System.out.println("bal is"+bal);

   i=(bal*y*r)/100; 

   System.out.println("interest is"+i);

   t=bal+i;

   System.out.println("t is"+t);

 }

 return 0;  

 }

}

import java.util.Scanner;

public class Test {

private static Scanner sc;

public static void main(String[] args)throws Exception

{

 Saving s=new Saving();

Current c=new Current();

sc = new Scanner(System.in);

int z,y;

int menu,n1;

String st,st1="";

System.out.println("Enter your option \n 1: savings 2: current");

z=sc.nextInt();

switch(z)

{

case 1:

String type="savings";

// System.out.println("enter name");

//  st1=sc.nextLine();

// st=st1;

st="rupa";

System.out.println("enter account number");

 n1=sc.nextInt();

s.getdata(st,n1);

//boolean quit=false;

//while(!quit)

do

{

System.out.print("enter your choice \n 1.deposit amount 2. display 3.interest 4.exit ");

 menu=sc.nextInt();

   switch(menu)

   {

    case 1:

  s.deposit();

  break;

    case 2:

   s.display();

   break;

    case 3:

     s.interest();

     break;

    case 4:

// System.out.print(0);

    break;

     }

}while(menu<=5);//end of while

break;

case 2:type="current";

//System.out.println("enter name");

// st=sc.nextLine();

 st="swarupa";

 System.out.println(st);

System.out.println("enter account number");

 n1=sc.nextInt();

 c.getdata(st,n1);

do

{

System.out.print("enter your choice \n 1.deposit amount 2.withdraw 3. display  4.exit ");

 y=sc.nextInt();

   switch(y)

   {

    case 1:

  c.deposit();

  break;

    case 2:

  c.withdraw();

   break;

    case 3:

   c.display();

   break;

    case 4:

    break;

     }

}while(y<=5);

break;

}

}

}