Question

1. The method generate() will produce integer arrays of a random size between 10 and 20 members.

2. The method print() will print out the members of an integer array input.

3. The method insert() will accept two arrays as inputs. It will produce a new array long enough to contain both arrays, and both input arrays should be inserted into the new array in the following manner: select a random member of the first array, and insert every member of the second array in before the first array. Thus, output should look like this (with smaller arrays):

Input 1: {1,2,3,4,5,6} Input 2: {10,11,12,13}

Output: {1,2,3,10,11,12,13,4,5,6}

4. The method shorten() should accept an input array and an input integer. It should check if the input integer actually refers to an index within the range of the input array’s length. If not, then return the original array. Otherwise, return a new array having length that is one member less than the input. The output array in that case should have the member referenced by the input index removed. E.g:

Input1: {1,2,3,4,5,6,7} Input 2: 25

Output: {1,2,3,4,5,6,7}

Input1: {1,2,3,4,5,6,7} Input 2: 5

Output: {1,2,3,4,5,7}

Write a main method that asks the user if they want to run insert or shorten. In each case, use generate() to produce random array inputs for each one, and generate your own random integer inputs. Then run the method associated with the user input.

Answer 1

Explanation::

• Code in JAVA is given below
• Please comments for better understanding of the code
• OUTPUT is given at the end of the code

CODE in JAVA::

import java.util.Random;

import java.util.Scanner;

public class RandomArray {

public static void main(String[] args) {

Scanner sc=new Scanner(System.in);

System.out.println("!WELCOME TO RANDOM ARRAY!");

int a[],b[],c[];

while(true) {

System.out.println("Select any one option");

System.out.println("1. Insert");

System.out.println("2. Shorten");

System.out.println("3. EXIT");

System.out.println("Your Choice : ");

int choice=sc.nextInt();

if(choice==3) {

break;

}else if(choice==1) {

System.out.println("Array A:");

a=generate();

print(a);

System.out.println("\nArray B:");

b=generate();

print(b);

System.out.println("\nAfter insert Array C:");

c=insert(a,b);

print(c);

}else {

a=generate();

System.out.println("Array A:");

print(a);

System.out.println("\nEnter the index :");

int index=sc.nextInt();

a=shorten(a,index);

System.out.println("\nArray A after shorten:");

print(a);

}

System.out.println("\n");

}

}

public static int[] generate() {

/**

* We generate an integer array of random size between 10 - 20 members

* */

Random ran = new Random();

/**

* An integer named size is declared and it stores the random number

* generated

* */

int size=ran.nextInt(11)+10;

/**

* We create an integer array named a of length size

* */

int a[]=new int[size];

for(int i=0;i<size;i++) {

/**

* We generate random numbers in array a[] between 1 and 100

* */

a[i]=ran.nextInt(100)+1;

}

return a;

}

public static void print(int a[]) {

/**

* We just print the array a

* */

for(int i=0;i<a.length;i++) {

System.out.print(a[i]+" ");

}

System.out.println();

}

public static int[] insert(int a[],int b[]) {

Random ran = new Random();

int c[]=new int[a.length+b.length];

/*

* An integer named memberIndex is declared and initialized as random number

* between 0 and a.length-1

* */

int memberIndex=ran.nextInt(a.length);

int index=0;

for(int i=0;i<memberIndex;i++) {

c[index]=a[i];

index++;

}

for(int j=0;j<b.length;j++) {

c[index]=b[j];

index++;

}

for(int i=memberIndex;i<a.length;i++) {

c[index]=a[i];

index++;

}

return c;

}

public static int[] shorten(int a[],int index) {

int b[]=new int[a.length-1];

if(index>=0 && index<a.length) {

int j=0;

for(int i=0;i<a.length;i++) {

if(i!=index) {

b[j]=a[i];

j++;

}

}

return b;

}

return a;

}

}

OUTPUT:

!WELCOME TO RANDOM ARRAY!

Select any one option

1. Insert

2. Shorten

3. EXIT

Your Choice :

1

Array A:

53 52 36 77 70 13 12 54 66 16 52 64 40 65 56 98 34 15

Array B:

22 96 72 64 32 87 87 44 46 24 76

After insert Array C:

53 52 36 77 70 13 12 22 96 72 64 32 87 87 44 46 24 76 54 66 16 52 64 40 65 56 98 34 15

Select any one option

1. Insert

2. Shorten

3. EXIT

Your Choice :

2

Array A:

13 11 75 15 75 48 22 92 60 60 3 66 21 6

Enter the index :

0

Array A after shorten:

11 75 15 75 48 22 92 60 60 3 66 21 6

Select any one option

1. Insert

2. Shorten

3. EXIT

Your Choice :

3

Please provide the feedback!!

Thank You!!