caN someone help me with this
i cant store information can someone help me modify this program
Code:
import java.io.*;
public class Mprogram
{
static MetalNode curr,curr2,curr3,
prev,newNode,list,list2,list3;
static BufferedReader br;
static int choice,choice1,choice2,choice3;
static String weight,price,color,name,select,search;
//brand name
static void displayName()
{
System.out.println("Brand Name : "+name);
}
//weight number
static void displayList ( MetalNode list )
{
for ( MetalNode curr = list; curr != null; curr =
curr.getNext())
{
System.out.println("Weight Number : "+ curr.getItem() + " -> ");
}
}
//price
static void displayList2 (MetalNode list2)
{
for ( MetalNode curr2 = list2; curr2 != null; curr2 =
curr2.getNext())
{
System.out.println("Price : "+ curr2.getItem2() + " -> ");
}
}
//color
static void displayList3 (MetalNode list3)
{
for ( MetalNode curr3 = list3; curr3 != null; curr3 =
curr3.getNext())
{
System.out.println("Color : "+ curr3.getItem3() + " -> ");
}
}
//add item
static void addItem () throws IOException
{
br = new BufferedReader( new InputStreamReader( System.in));
//Brand name
System.out.print("Brand Name : " );
name = br.readLine();
//list
System.out.print("Weight Number : " );
weight = br.readLine();
choice = Integer.parseInt(weight);
newNode = new MetalNode(choice);
prev = null;
curr = list;
while ( curr != null && choice > curr.getItem())
{
prev = curr;
curr = curr.getNext();
}
if ( prev == null )
{
newNode.setNext(list);
list = newNode;
}
if ( prev != null && list != null )
{
newNode.setNext(curr);
prev.setNext(newNode);
}
//list2
System.out.print("Price : " );
price = br.readLine();
choice1 = Integer.parseInt(price);
newNode = new MetalNode(choice1);
prev = null;
curr2 = list2;
while ( curr2 != null && choice1 > curr2.getItem2())
{
prev = curr2;
curr2 = curr2.getNext();
}
if ( prev == null )
{
newNode.setNext(list2);
list2 = newNode;
}
if ( prev != null && list2 != null )
{
newNode.setNext(curr2);
prev.setNext(newNode);
}
//list3
System.out.print("Color : " );
color = br.readLine();
choice2 = Integer.parseInt(color);
newNode = new MetalNode(choice2);
prev = null;
curr3 = list3;
while ( curr != null && choice2 > curr3.getItem3())
{
prev = curr3;
curr3 = curr3.getNext();
}
if ( prev == null )
{
newNode.setNext(list3);
list3 = newNode;
}
if ( prev != null && list3 != null )
{
newNode.setNext(curr3);
prev.setNext(newNode);
}
System.out.println("");
displayName();
displayList(list);
displayList2(list2);
displayList3(list3);
}
//delete item
static void deleteItem() throws IOException
{
br = new BufferedReader ( new InputStreamReader( System.in));
System.out.print("Remove Price : " );
price = br.readLine();
choice = Integer.parseInt(price);
prev = null;
curr2 = list2;
while ( curr2 != null && choice != curr2.getItem())
{
prev = curr2;
curr2 = curr2.getNext();
}
if ( prev == null )
{
list2 = list2.getNext();
}
if (prev != null && list2 != null )
{
prev.setNext(curr.getNext());
}
displayList(list2);
System.out.println("Price Deleted!");
}
//viewing
static void view()
{
displayName();
displayList(list);
displayList2(list2);
displayList3(list3);
}
//searching
static void search() throws IOException
{
br = new BufferedReader (new InputStreamReader (System.in));
System.out.print("Search Item : ");
search = br.readLine();
if(search == name)
{
displayName();
displayList(list);
displayList2(list2);
displayList3(list3);
}
else
System.out.println("Item Found!");
}
//main program
public static void main (String[] args)throws Exception
{
list = null;
do
{
br = new BufferedReader ( new InputStreamReader(
System.in));
System.out.println(" | |");
System.out.println(" | Metalshop |");
System.out.println(" | |");
System.out.println(" Selection");
System.out.println(" 1 - Add Item");
System.out.println(" 2 - Delete Item");
System.out.println(" 3 - View Item" );
System.out.println(" 4 - Search Item" );
System.out.println(" 5 - Exit" );
System.out.print(" Enter Your Choice ");
select = br.readLine();
choice = Integer.parseInt(select);
switch (choice)
{
case 1 : addItem();
break;
case 2 : deleteItem();
break;
case 3 : view();
break;
case 4 : search();
break;
case 5 : System.out.println(" ~~~~~~~ Program Terminated! ~~~~~~~");
break;
default : System.out.println("Invalid Input");
break;
}
} while (choice!=5);
System.exit(0);
}
}
public class MetalNode
{
private int color,weight_number,price;
private MetalNode next;
public MetalNode ( int newItem )
{
color = newItem;
weight_number = newItem;
price = newItem;
next = null;
}
public void setItem ( int newItem )
{
color = newItem;
weight_number = newItem;
price = newItem;
}
public int getItem ()
{
return color;
}
public int getItem2 ()
{
return weight_number;
}
public int getItem3 ()
{
return price;
}
public void setNext ( MetalNode nextNode )
{
next = nextNode;
}
public MetalNode getNext()
{
return next;
}
}
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