JAVA PROGRAM - File saving and loading 1. Using the code below implement an opti

ID: 3812723 • Letter: J

Question

JAVA PROGRAM - File saving and loading

1. Using the code below implement an option to save the plants to a file. You must also be able to load the saved information from a previously saved file.

2. Use the file class and/or scanner class for file saving/loading methods

3. You MUST submit a sample file that can be loaded into your program without any changes (except the file path)

package flowerpack;

import java.util.ArrayList;
import java.util.Scanner;

}
}
if(flag==0)
{
System.out.println("plant not found") ;
}
break;
case 3:
input.nextLine();
System.out.print("Enter the name of the plant you want to search : ");
name=input.nextLine();
int f=0;
for(Plant plant:flowerPack)
{
if(plant.getName().equalsIgnoreCase(name))
{
System.out.println("plant found sucessfully") ;
f=1;
break;
}
}
if(f==0)
{
System.out.println("plant not found") ;
}
break;
case 4:
input.nextLine();
System.out.print("Enter the name of the plant you want to filter: ");
name=input.nextLine();
f=0;
for(Plant plant:flowerPack)
{
if(plant.getName().equalsIgnoreCase(name))
{
System.out.println("Name: " + plant.getName() + " ID: " + plant.getID()) ;
f=1;
}
}
if(f==0)
{
System.out.println("NO plant of this name in List") ;
}
break;
case 5: System.exit(0);
}
}
}catch(Exception e)
{
System.out.println(e);
}
}

}

*************

package flowerpack;

public class Plant {
String name;
String ID;
Plant(String name,String ID)
{
this.name=name;
this.ID=ID;
}
public String getName()
{
return name;
}
public String getID()
{
return ID;
}
}
class Flower extends Plant
{
String color;
boolean thorns;
boolean smell;
public Flower(String name, String ID,String color,boolean thorns,boolean smell) {
super(name, ID);
this.color=color;
this.thorns=thorns;
this.smell=smell;
}

}
class Fungus extends Plant
{
String Color;
boolean Poisonous;
public Fungus(String name, String ID,String Color,boolean Poisonous) {
super(name, ID);
this.Color=Color;
this.Poisonous=Poisonous;
}

}
class Weed extends Plant
{
String Color;
boolean Poisonous;
boolean Edible;
boolean Medicinal;
public Weed(String name, String ID,String Color,boolean Poisonous,boolean Edible, boolean Medicinal) {
super(name, ID);
this.Color=Color;
this.Poisonous=Poisonous;
this.Edible=Edible;
this.Medicinal=Medicinal;
}

}

Explanation / Answer

I used file and serializable concepts to save and load the flowers content to file. Let me know if serilizable topic is not yet covered.

compile this project and execute to generate the sample file. Plants.txt file gets generated with the sample file content.

package flowerpack;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Scanner;

public class FlowerPack {
   public static void main(String[] args) {
       try{
           ArrayList <Plant> flowerPack= new ArrayList<>();
           Scanner input=new Scanner(System.in);
           int choice;
           String name, color, ID;
           boolean poisonous,edible,medicinal,smell,thorns;
           while(true)
           {
               System.out.println(" 1. Add plants");
               System.out.println("2. Remove plants");
               System.out.println("3. Search plants");
               System.out.println("4. Filter plants");
               System.out.println("5. Save to file");
               System.out.println("6. Load from file");
               System.out.println("7. Quit");
               System.out.print("Enter your choice: ");
               choice=input.nextInt();
               switch(choice)
               {
               case 1:
                   input.nextLine();
                   System.out.print("You want to add Flower, Fungus or Weed? <Flower / Fungus / Weed> ");
                   String type=input.nextLine();
                   if(type.equalsIgnoreCase("Flower"))
                   {
                       System.out.print("Enter name : ");
                       name=input.nextLine();
                       System.out.print("Enter ID : ");
                       ID=input.nextLine();
                       System.out.print("Enter color : ");
                       color=input.nextLine();
                       System.out.print("Has thorns? ");
                       thorns=input.hasNextBoolean();
                       input.nextLine();
                       System.out.print("Has smell? ");
                       smell=input.hasNextBoolean();
                       input.nextLine();
                       flowerPack.add(new Flower(name,ID,color,thorns,smell));
                   }
                   else if(type.equalsIgnoreCase("Fungus"))
                   {
                       System.out.print("Enter name : ");
                       name=input.nextLine();
                       System.out.print("Enter ID : ");
                       ID=input.nextLine();
                       System.out.print("Enter color : ");
                       color=input.nextLine();
                       System.out.print("Is it poisonous? ");
                       poisonous=input.hasNextBoolean();
                       input.nextLine();
                       flowerPack.add(new Fungus(name,ID,color,poisonous));
                   }
                   else if(type.equalsIgnoreCase("Weed"))
                   {
                       System.out.print("Enter name : ");
                       name=input.nextLine();
                       System.out.print("Enter ID : ");
                       ID=input.nextLine();
                       System.out.print("Enter color : ");
                       color=input.nextLine();
                       System.out.print("Is it Poisonous? ");
                       poisonous=input.hasNextBoolean();
                       input.nextLine();
                       System.out.print("Is it Edible? ");
                       edible=input.hasNextBoolean();
                       input.nextLine();
                       System.out.print("Is it Medicinal? ");
                       medicinal=input.hasNextBoolean();
                       input.nextLine();
                       flowerPack.add(new Weed(name,ID,color,poisonous,edible,medicinal));
                   }
                   break;
               case 2:input.nextLine();
               System.out.print("Enter the name of the plant you want to remove : ");
               name=input.nextLine();
               int flag=0;
               for(Plant plant:flowerPack)
               {
                   if(plant.getName().equalsIgnoreCase(name))
                   {
                       System.out.println("plant removed sucessfully") ;
                       flag=1;
                       break;
                   }
               }
               if(flag==0)
               {
                   System.out.println("plant not found") ;
               }
               break;
               case 3:
                   input.nextLine();
                   System.out.print("Enter the name of the plant you want to search : ");
                   name=input.nextLine();
                   int f=0;
                   for(Plant plant:flowerPack)
                   {
                       if(plant.getName().equalsIgnoreCase(name))
                       {
                           System.out.println("plant found sucessfully") ;
                           f=1;
                           break;
                       }
                   }
                   if(f==0)
                   {
                       System.out.println("plant not found") ;
                   }
                   break;
               case 4:
                   input.nextLine();
                   System.out.print("Enter the name of the plant you want to filter: ");
                   name=input.nextLine();
                   f=0;
                   for(Plant plant:flowerPack)
                   {
                       if(plant.getName().equalsIgnoreCase(name))
                       {
                           System.out.println("Name: " + plant.getName() + " ID: " + plant.getID()) ;
                           f=1;
                       }
                   }
                   if(f==0)
                   {
                       System.out.println("NO plant of this name in List") ;
                   }
                   break;
               case 5:
                   File file = new File("Plants.txt");
                   FileOutputStream fStream = new FileOutputStream(file);
                   ObjectOutputStream stream = new ObjectOutputStream(fStream);
                   stream.writeObject(flowerPack);
                   stream.close();
                   break;

               case 6:
                   File file2 = new File("Plants.txt");
                   FileInputStream fileStream = new FileInputStream(file2);
                   ObjectInputStream oStream = new ObjectInputStream(fileStream);
                   ArrayList<Plant> readObject = ((ArrayList<Plant>)oStream.readObject());
                   flowerPack.addAll(readObject);
                   oStream.close();
                   break;
               case 7: System.exit(0);
               }
           }
       }catch(Exception e)
       {
           System.out.println(e);
       }
   }

}

######################################

package flowerpack;

import java.io.Serializable;

public class Plant implements Serializable{
String name;
String ID;
Plant(String name,String ID)
{
this.name=name;
this.ID=ID;
}
public String getName()
{
return name;
}
public String getID()
{
return ID;
}
}

#####################################

package flowerpack;

class Fungus extends Plant
{
String Color;
boolean Poisonous;
public Fungus(String name, String ID,String Color,boolean Poisonous) {
super(name, ID);
this.Color=Color;
this.Poisonous=Poisonous;
}
}

###############################

package flowerpack;

class Flower extends Plant
{
String color;
boolean thorns;
boolean smell;
public Flower(String name, String ID,String color,boolean thorns,boolean smell) {
super(name, ID);
this.color=color;
this.thorns=thorns;
this.smell=smell;
}
}

#######################

package flowerpack;

class Weed extends Plant
{
String Color;
boolean Poisonous;
boolean Edible;
boolean Medicinal;
public Weed(String name, String ID,String Color,boolean Poisonous,boolean Edible, boolean Medicinal) {
super(name, ID);
this.Color=Color;
this.Poisonous=Poisonous;
this.Edible=Edible;
this.Medicinal=Medicinal;
}
}

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