Question

Please do in Java as simply as possible :)

Exercise #3: Design and implement a program (name it ArrayMethods), that defines 4 methods as follows:

int arrayMax(int[] arr) returns the maximum value in the an array

int arrayMin(int[] arr) returns the minimum value in an array

void arraySquared(int[] arr) changes every value in the array to its square (value²)

void arrayReverse(int[] arr) reverses the array (for example: array storing 7   8   9 becomes 9   8   7 )

The program main method creates a single-dimensional array of length 5 elements and initialize it with random integers between 1 and 100. The program displays the original array, then calls each of the above methods and displays their results as shown below. Document your code and organized your output following these sample runs.

Sample run 1:

Original array: 3, 5, 2, 6, 1

Max value:      6

Min value:      1

Squared array: 9, 25, 4, 36, 1

Reversed array: 1, 36, 4, 25, 9

Sample run 2:

Original array: 3, 2, 3, 7, 2

Max value:      7

Min value:      2

Squared array: 9, 4, 9, 49, 4

Reversed array: 4, 49, 9, 4, 9

Sample run 3:

Original array: 2, 2, 2, 2, 2

Max value:      2

Min value:      2

Squared array: 4, 4, 4, 4, 4

Reversed array: 4, 4, 4, 4, 4

Answer 1

Source code:

import java.util.*;
public class Main
{
public static void main(String[] args)
{
Scanner s=new Scanner(System.in);
System.out.println("Enter the length of array");
int n=s.nextInt();
int[] array=new int[n];
System.out.println("Enter values into array");
for(int i=0;i<5;i++)
{
array[i]=s.nextInt();//assigning values to array
}
System.out.print("Orginal array:");
for(int i=0;i<5;i++)
{
System.out.print(array[i]+",");
}
System.out.println();
System.out.println("Max value: "+arrayMax(array));
//print max value returned from method
System.out.println("Min value: "+arrayMin(array));
//print min value returned from method
arraySquared(array);
//method to get the squars passing array as argument
arrayReversed(array);
}
public static int arrayMax(int[] array)
{
int max=array[0];
for(int i=0;i<5;i++)
{
if(array[i]>max)
//condition:if element greater than max then max=new element
{
max=array[i];
}
}
return max;//send max element to main
}
public static int arrayMin(int[] array)
{
int min=array[0];
for(int i=0;i<5;i++)
{
if(array[i]<min)
//if element less than min then assign element to min
{
min=array[i];
}
}
return min;//return min to main
}
public static void arraySquared(int[] array)
{
System.out.print("Squared array:");
int[] array1=new int[5];//new array to store result elements
for(int i=0;i<5;i++)
{
array1[i]=array[i]*array[i];//square and store in new array
System.out.print(array1[i]+",");
}
System.out.println();
}
public static void arrayReversed(int[] array)
{
System.out.print("Reversed array:");
for(int i=4;i>=0;i--)//loops goes from backwards to print reverse
{
System.out.print(array[i]+",");
}
System.out.println();
}
}

output:

//Please comment if you have any doubt