Question

Write one Java program and satisfy the following requirements:

1. Write a method called cube that accepts one integer parameter and returns that value raised to the third power.

2. Write a method called randomNumber that returns a random floating-point number in the range of [-20.0, 50.0). (hints: use Random class in the method)

3. Write a method called findMax that accepts three floating-point number as parameters and returns the largest one.(hints: use conditional statement in the method)

4. Overload findMax that accepts one integer parameter representing the amount, the method will read the floating-point number one by one within the amount and return the largest value. (hints: use Scanner class and loop statement in the method)

5. In the main method, invoke the above methods and output their results.

Answer 1

import java.util.Scanner;
import java.util.Random;
import java.lang.Math;
public class Main
{
   public static void main(String[] args)
   {
   Scanner in=new Scanner(System.in);
       System.out.println("Enter any number n: ");
       //read input for a,b,c
       int n=in.nextInt();
       System.out.println("cube of n ="+cube(n));
      
       System.out.println("Random number generated:"+randomNumber());
      
       //read input for a,b,c and call findMAx with 3 parameters
       System.out.println("Enter 3 float numbers :");
       float a=in.nextFloat();
       float b=in.nextFloat();
       float c=in.nextFloat();
       System.out.println("Maximum of a ,b and c is :"+findMax(a,b,c));
       //call find MAx with one parameter
       System.out.println("Enter size of array :");
       int amount=in.nextInt();
       System.out.println("Maximum of given list is :"+ findMax(amount));
      
   }
  
   static int cube(int n)
   {
   return (n*n*n);
   }
   static float randomNumber()
   {
   Random r=new Random();
   float n=r.nextFloat()*(float)(50.0-(-21.0))-(float)20.0;
   return n;
   }
static float findMax(float a,float b,float c)
   {
  
   if(a>b)
   {
   if(a>c)
   return a;
   else
   return c;
   }
   else
   {
   if(b>c)
   return b;
   else
   return c;
   }
   }
  
   static float findMax(int amount)
   {
  
   float []array=new float[amount];
   Scanner in=new Scanner(System.in);
   System.out.println("Enter "+amount+"Elements to array: ");
   for(int i=0;i<amount;i++) //to read array elements
   array[i]=in.nextFloat();
  
   float max=array[0];
   for(int i=1;i<amount;i++)
   {
   if(max<array[i])
   max=array[i];
   }
   return max;
  
   }//close findMax function
  
}//close class