I want to search for a certain plant id number, and if that id number is found a

Question

I want to search for a certain plant id number, and if that id number is found add, however any more plants that id is associated with to the inventory. So I want to add whatever the user inputs into an existing array list. Here is the code that I started:

     private String id;
   private String description;
   private int numInStock;
   private double ourCost;
   private double salesCost;
  
      
   public Plants() {
       super();
   }

   public Plants(String id, String desc, int num, double cost,
           double value) {
       description = desc;
       this.id = id;
       numInStock = num;
       ourCost = cost;
       salesCost = value;
      
   }

public static void idAddPlant(ArrayList st, String num) {
       // look for a certain policy
       Scanner scan = new Scanner(System.in);
       boolean found = false;
       int i = 0;

       // note a while loop since we want to stop once we find them
       // each one should be present only once!
       while (!found && i < st.size()) {       // two ways to end - we find it or we get to the end
           Plants plants = st.get(i);
           String idNum = plants.getId();
           if (idNum == num) {                       // found it!!
               found = true;                       // set found to true to end the loop
               System.out.println("How many plants do you want to add to the inventory?");
               int addInv = scan.nextInt();
              
               // print it out
           } else
               i++;                               // look at the next one
       }

       if (!found)                                   // check to see if it ever was found
           System.out.println("*** That policy does not exist. ***");

Explanation / Answer

import java.util.ArrayList;

import java.util.List;

import java.util.Scanner;

public class Plants {

private String id;

private String description;

private int numInStock;

private double ourCost;

private double salesCost;

public static List<Plants> items = new ArrayList<Plants>();

public Plants(String id, String description, int numInStock, double ourCost, double salesCost) {

super();

this.id = id;

this.description = description;

this.numInStock = numInStock;

this.ourCost = ourCost;

this.salesCost = salesCost;

}

public static void main(String[] args) {

Plants p = new Plants("1", "abc", 12, 19.00, 20.00);

items.add(p);

boolean found = false;

Scanner reader = new Scanner(System.in);

System.out.println("Enter the plantid you want to search:");

String pid = reader.nextLine();

for (int i = 0; i < items.size(); i++) {

if (pid == items.get(i).id.toString()) {

found = true;

break;

}

}

if (found == false) {

System.out.println("Enter the inventory size you want to add:");

int arrSize = reader.nextInt();

for (int i = 0; i < arrSize; i++) {

System.out.println("Enter inventory of " + i + ":");

String plantId = reader.nextLine();

String plantDesc = reader.nextLine();

int numInStock = reader.nextInt();

double ourCost = reader.nextDouble();

double saleCost = reader.nextDouble();

Plants invPlant = new Plants(plantId, plantDesc, numInStock, ourCost, saleCost);

items.add(invPlant);

}

}

reader.close();

}

}

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