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MCA- 2A/SunnyTamang-2001153/Java

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+

MCA- 2A/SunnyTamang-2001153/Q1.java

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+import java.io.*;
+
+public class ques1 
+{
+    public static void main(String[] args) throws IOException 
+    {
+        // PrintWriter object for file3.txt
+        PrintWriter pw = new PrintWriter("three.txt");
+
+        // BufferedReader object for file1.txt
+        BufferedReader br1 = new BufferedReader(new FileReader("one.txt"));
+        BufferedReader br2 = new BufferedReader(new FileReader("two.txt"));
+
+
+        String line1 = br1.readLine();
+        String line2 = br2.readLine();
+
+        // loop to copy lines of 
+        // file1.txt and file2.txt 
+        // to  file3.txt alternatively
+        while (line1 != null || line2 !=null)
+        {
+            if(line1 != null)
+            {
+                pw.println(line1);
+                line1 = br1.readLine();
+            }
+
+            if(line2 != null)
+            {
+                pw.println(line2);
+                line2 = br2.readLine();
+            }
+        }
+
+        pw.flush();
+
+        // closing resources
+        br1.close();
+        br2.close();
+        pw.close();
+
+        System.out.println("Merged file1.txt and file2.txt alternatively into file3.txt");
+        br1 = new BufferedReader(new FileReader("three.txt"));
+
+           String st;
+           while ((st = br1.readLine()) != null)
+             System.out.println(st);
+    }
+}

MCA- 2A/SunnyTamang-2001153/Q2.java

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+import java.io.*;
+import java.lang.*;
+class LessBalanceException extends Exception
+{
+ LessBalanceException(double amt)
+ {
+ System.out.println("Withdrawing "+amt+" is invlaid");
+ }
+}
+class Account
+{
+ static int count=0;
+ int accno;
+ double bal;
+ String name;
+ Account(double bal,String n,int accno)
+ {
+  System.out.println("\nNew Account opened....!!");
+  this.bal=bal;
+  count++;
+  System.out.println("Account Holder Name : " + n);
+  name=n;
+  System.out.println("Your Account Number is : "+accno);
+  this.accno=accno;
+  System.out.println("Total number of accounts : "+count);
+
+ }
+ void deposit(double amt)
+ {
+  System.out.println("Availabe Balance : "+bal); 
+  bal=bal+amt;
+  System.out.println("Rs. : "+amt+" /- Created");
+  System.out.println("Balance : "+bal);
+ }
+ void withdraw(double amt) throws LessBalanceException
+ {
+  System.out.println("\nAvailabe Balance : "+bal);
+  bal-=amt;
+  if(bal<500)
+  {
+   bal+=amt;
+   throw new LessBalanceException(amt);
+  }
+  System.out.println("Rs. : "+amt+ "/-Debited");
+  System.out.println("Balacne : "+bal);
+ }
+ void balance()
+ {
+  System.out.println("\nCustomer information");
+  System.out.println("============================================");
+  System.out.println("Customer Name : "+name);
+  System.out.println("Account Number : "+accno);
+  System.out.println("Balance : "+bal);
+ }
+}
+class AccountDemo
+{
+ static int i=0;
+ public static void main(String argv[]) throws IOException
+ {
+  Account ob[]=new Account[10];
+  BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
+  double amt;
+  String name;
+  int ch,accno,k;
+  boolean t=false;
+  while(true)
+  {
+   System.out.println("\n*** Bank Transaction ***");
+   System.out.println("1.Open new Account\n2.Deposit");   
+   System.out.println("3.Withdraw\n4.Balance\n5.Exit");
+   System.out.print("Enter your choice : ");
+   ch=Integer.parseInt(br.readLine());
+   switch(ch)
+   {
+   case 1:
+   System.out.println("Opening New Account : ");
+   System.out.print("Enter your name : ");
+   name=br.readLine();
+   System.out.print("\nEnter Account Number : ");
+   accno=Integer.parseInt(br.readLine());
+   System.out.print("\nEnter initial amount(to be >=500) : ");
+   amt=Double.parseDouble(br.readLine());
+   if(amt<500)
+   System.out.println("You cannot create an account with less than Rs.500/-");
+   else
+   {
+    ob[i]=new Account(amt,name,accno);
+    i++;
+   }
+   break;
+
+   case 2:
+   System.out.print("\nEnter Account number : ");
+   accno=Integer.parseInt(br.readLine());
+   for(k=0;k<i;k++)
+   if(accno==ob[k].accno)
+   {
+    t=true;
+    break;
+   }
+
+   if(t)
+   {
+    System.out.print("\nEnter the Amount for Deposit : ");
+    amt=Double.parseDouble(br.readLine());
+    ob[k].deposit(amt);
+   }
+   else
+   System.out.println("Invalid Account Number...!!!");
+   t=false;
+   break;
+
+   case 3:
+   System.out.print("\nEnter Account number : ");
+   accno=Integer.parseInt(br.readLine());
+   for(k=0;k<i;k++)
+   if(accno==ob[k].accno)
+   {
+    t=true;
+    break;
+   }
+
+   if(t)
+   {
+    System.out.print("\nEnter the Amount for Withdraw : ");
+    amt=Double.parseDouble(br.readLine());
+    try
+    {
+     ob[k].withdraw(amt);
+    }
+    catch(LessBalanceException e)
+    {}
+   }
+   else
+   System.out.println("Invalid Account Number...!!!");
+   t=false;
+   break;
+
+   case 4:
+   System.out.print("\nEnter Account number : ");
+   accno=Integer.parseInt(br.readLine());
+   for(k=0;k<i;k++)
+   if(accno==ob[k].accno)
+   {
+    t=true;
+    break;
+   }
+
+   if(t)
+   {
+    //System.out.println(accno +" asdfsdf " +ob[k].accno);
+    ob[k].balance();
+   }
+   else
+   System.out.println("Invalid Account Number...!!!");
+   t=false;
+   break;
+
+   case 5:
+   System.exit(1);
+   default: System.out.println("Invalid Choice !!!");
+   }
+  }
+ }
+}