Question

"Please Solve Problem 2 Please"

Program 1(Total Point 15): You will use scanner class and ask users to enter numbers from 0 to 10 numbers. You will then extract only non prime numbers and store it in the set. You will then print the entire set contents.

Problem 2(Total Point 15): Write a Java program that performs following things.

Generate 10 random numbers
Store all the numbers into the set
Use the iterator or any other class to extract all the elements from the set
Perform addition
Display output

Problem 3(Total Point 15):

Create the tree map that should store following strings.

- Hello

- Today

- Is

- Monday

Once you stored all the data in the tree map, then loop thru the tree map and remove Monday

Program 4(Total Point 15): You will use the scanner class and ask users following things.

- Student Age (Value)

- Student Name (Key)

You will store information for at least 10 students on Map. You will then use iterator to print all the values. You will print the youngest student’s name.

Program 5(Total Point 15):

Create the logic to print below series.

Num1: 1
Num2: 3
Num3: 5
Num4: 7
Num5: 9

You then need to store the entire series into the Hash map and tree map and then print the entire series.

Problem 6(Total Point 15):

Create the set that should store following strings.

-This
-Class
-is
-good
-We
-have
-learned
-lot
-of
-things.

Once you stored all the data in the set/map, then loop thru the set using iterator and remove all the strings that starts with either C or o.
And print the entire set as the single statement.

Problem 7(Total Point 10)

You need to create a base class that should have the following functionality.

- Calculate avg. Students grade. Input parameter to this method is an array that shows grades for at least ten courses.

You need to create a child class that inherits the base class. The child class should have a method to calculate max grade from 10 courses.

You need to write a demo class. The demo class should have a main method that calls child class and able to provide max and avg. Grade.

Answer 1

Code for Problem 2:

import java.util.*;
class Main
{
   public static void main(String args[])
   {
       int i,n,sum=0;
       Set<Integer> numbers = new HashSet<Integer>(); // Creating a Set Object
       Random rand = new Random();             //Creating a Random Object
       for(i=0;i<10;i++)
       {
           numbers.add(rand.nextInt(1000)); //Generating random numbers below 1000 and adding them to set
       }
       Iterator iterator = numbers.iterator();           //Creating an Iterator Object
       while(iterator.hasNext())                       //Checking whether set has elements or not
       {
           n = (Integer)iterator.next();                // iterating set to get next element
           sum=sum+n;              
       }
       System.out.println("Sum of 10 Random Numbers:"+sum);
      
   }
}

Outputs for the program: