What is the finished code in Java? Exercise File 1. Create an collection and fil

Question

What is the finished code in Java?

Exercise File 1. Create an collection and fill it with 20 random numbers between 1 and 15 (inclusive) Seed the constructor of class Random with the value 13 2. Print the numbers 3. Serialize the collection to a file called Numbers.ser 4. Deserialize the file into a new collection called numberFromFile. Remove all duplicate numbers 5. Print the resulting collection (the one without duplicates) Output: Numbers: [8, 11, 6, 14, 14, 6, 14, 9, 2, 15, 11, 7, 11, 11, 3] Numbers without duplicates: [2, 3, 6, 7, 8, 9, 11, 14, 15]

Explanation / Answer

//////////////////////////////////////////////////////////////////////////////////////////////////
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Random;
public class RemoveDuplicates{
@SuppressWarnings("unchecked")
public static void main(String[] args) throws IOException, ClassNotFoundException {
//Created Array Collection for Serialization and Deserialization
List<Integer> Collection = new ArrayList<Integer>();
List<Integer> numberFromFile = new ArrayList<Integer>();
Random rnd = new Random(40);
//Seed the random class with 13
rnd.setSeed(13);
for(int i=0;i<20;i++){
//calling rand function within range 1 to 15(inclusively)....
Collection.add(rnd.nextInt((15 - 1) + 1) + 1);
}
System.out.println("Numbers : "+Collection);
//serialization
FileOutputStream fileOut = new FileOutputStream("Numbers.ser");
ObjectOutputStream out = new ObjectOutputStream(fileOut);
out.writeObject(Collection);
out.close();
fileOut.close();
  
//Deserialization
FileInputStream fileIn = new FileInputStream("Numbers.ser");
ObjectInputStream in = new ObjectInputStream(fileIn);
numberFromFile = (List<Integer>) in.readObject();
  
//Converting List to hashset for removing the Duplicates...
HashSet<Integer> hashset = new HashSet<Integer>(numberFromFile);
  
System.out.println("Numbers Without Duplicates :"+hashset);
  
in.close();
fileIn.close();


}
}

Sample OutPut After Running Code :
Numbers : [8, 11, 6, 14, 14, 6, 14, 9, 2, 15, 11, 7, 11, 11, 3, 15, 5, 15, 11, 15]
Numbers Without Duplicates :[2, 3, 5, 6, 7, 8, 9, 11, 14, 15]

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