Name : Shreyal Mandot
Title : Assignment 5b1. Write a programme to store item information (id,name,price,qty) in file "item.dat". Write a menu driven program to perform the following operations:
1:Search for a item by name
2:Find costliest item
3:Display all items and total cost
import java.io.*;
import java.util.*;
class item
{
String name,id;
int qty;
double price,total;
item(String i,String n,String q,String p)
{
name=n;
id=i;
qty=Integer.parseInt(q);
price=Double.parseDouble(p);
total=qty*price;
}
public
String toString()
{
String s=name+" "+id+" "+qty+" "+price+" "+total;
return(s);
}
public static void search(item[] arr,int n)throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
String s=br.readLine();
for(int i=0;i<n;i++)
{
if(arr[i].name.equals(s))
{
System.out.println(arr[i].toString());
return;
}
}
System.out.println("No Records Found");
}
public static void searchc(item[] arr,int n)
{
double max=0;int c=0;
for(int i=0;i<n;i++)
{
if(arr[i].price > max)
{
c=i;
}
}
System.out.println(arr[c].toString());
}
}
class ass5b1
{
public static void main(String[] args)throws IOException
{
String s,space=" ";
int c,i;
BufferedReader b=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter no. of records");
int n=Integer.parseInt(b.readLine());
System.out.println("Enter Records:\n<id> <name> <price> <qty> :");
FileWriter f=new FileWriter("item.dat");
for(i=0;i<n;i++)
{
s=b.readLine()+"\n";
f.write(s);
}
f.close();
item it[]=new item[20];
FileReader fr=new FileReader("item.dat");
BufferedReader br=new BufferedReader(fr);
for(i=0;i<n;i++)
{
s=br.readLine();
StringTokenizer t=new StringTokenizer(s,space);
String si=new String(t.nextToken());
String sn=new String(t.nextToken());
String sq=new String(t.nextToken());
String sp=new String(t.nextToken());
it[i]=new item(si,sn,sq,sp);
}
do
{
System.out.println("Menu :\n"+"1:Search for a item by name\n"+"2:Find costliest item\n"+"3:Display all items and total cost\n4:Exit\n"+"Choice :" );
c=Integer.parseInt(b.readLine());
switch (c)
{
case 1:
System.out.println("Enter item name to be searched:");
item.search(it,n); break;
case 2:
System.out.println("Costliest Item :");item.searchc(it,n);break;
case 3:
for(i=0;i<n;i++)
System.out.println(it[i].toString());
break;
case 4:
break;
default:
System.out.println("Invalid Option");
}
}while(c!=4);
}
}
/*
Output-
[prady@localhost setB]$ javac ass5b1.java
[prady@localhost setB]$ java ass5b1
Enter no. of records
3
Enter Records:
<id> <name> <price> <qty> :
1001 Tyres 2000 4
1002 Leather 750 5
1003 Mirrors 190 2
Menu :
1:Search for a item by name
2:Find costliest item
3:Display all items and total cost
4:ExitChoice :
1
Enter item name to be searched:
Tyres
Tyres 1001 2000 4.0 8000.0
Menu :
1:Search for a item by name
2:Find costliest item
3:Display all items and total cost
4:ExitChoice :
2
Costliest Item :
Mirrors 1003 190 2.0 380.0
Menu :
1:Search for a item by name
2:Find costliest item
3:Display all items and total cost
4:ExitChoice :
3
Tyres 1001 2000 4.0 8000.0
Leather 1002 750 5.0 3750.0
Mirrors 1003 190 2.0 380.0
Menu :
1:Search for a item by name
2:Find costliest item
3:Display all items and total cost
4:ExitChoice :
4
[prady@localhost setB]$
*/
