ArrayOutLine .java

package array;
import java.util.*;

public class ArrayOutLine {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		//Asking the user name
		System.out.println("Hi! Please Enter your Name: ");
		String name = scan.nextLine();
		//Ask the user what operation he wants to perform by giving the user the options 
		System.out.println("Hi "+name+" Please select what you want enter from below options: ");
		System.out.println("1.Enter the ages details ");
		System.out.println("2.Enter the classroom and age details");
		System.out.println("3.Enter the school,classroom and age details of the student");
		//Take the input and call the required method which implemented in the Arrayimplement class

		ArrayImplementaion ai=new ArrayImplementaion();//object of Arrayimplement class

		int choice = scan.nextInt();
		if(choice == 1)
		{
			ai.oneDArr();

		}	
		else if(choice ==2)
		{
			ai.twoDArr();
		}
		else if(choice ==3)
		{
			ai.threeDArr();
		}


	}

}

class ArrayImplementaion
{
	void oneDArr()
	{
		Scanner scan = new Scanner(System.in);
		//Ask the no of ages(size of the array) the user wants
		System.out.println("Enter the no of ages deatils you want to enter: ");
		int n=scan.nextInt();
		int[] a=new int[n];
		//taking ages from user
		for(int i=0;i<a.length;i++)
		{
			System.out.println("Enter the "+(i+1)+" age");
			a[i]=scan.nextInt();
		}
		//displaying the ages
		System.out.println("The ages of the students are: ");
		for(int i=0;i<a.length;i++)
		{
			System.out.print(a[i]+" ");
		}

	}

	void twoDArr()
	{
		Scanner scan = new Scanner(System.in);
		//First ask the user for the no of classrooms(size of the row)
		System.out.println("Enter the no of classrooms: ");
		int r=scan.nextInt();
		int[][] a=new int[r][];
		//now ask the no of student ages(size of the colums) for each classroom(row)
		for(int i=0;i<r;i++) 
		{
			System.out.println("enter the no of students in "+(i+1)+" classroom:");
			a[i]=new int[scan.nextInt()];
		}

		//now the array is created for classroom and students present in
		//ask the user to enter the deatils
		for(int i=0;i<a.length;i++)
		{
			for(int j=0;j<a[i].length;j++)
			{
				System.out.println("Enter the classroom "+(i+1)+" student "+(j+1)+" age: ");
				a[i][j]=scan.nextInt();
			}
		}
		//display the details
		System.out.println("The ages are");
		for(int i=0;i<a.length;i++)
		{
			for(int j=0;j<a[i].length;j++)
			{
				System.out.print(a[i][j]+" ");
			}
			System.out.println();
		}
	}

	void threeDArr()
	{
		Scanner scan = new Scanner(System.in);
		//ask the user for the no of schools(size of the blocks)
		System.out.println("Enter the no of schools:");
		int b = scan.nextInt();
		int[][][] a=new int[b][][];
		//now ask the no of classrooms(no of rows) present in each school
		for(int i=0;i<a.length;i++) {
			System.out.println("enter the no of classrooms in school "+(i+1)+" :");
			a[i]=new int[scan.nextInt()][];
		}
		//finally ask the the no of students(no of columns) in each class
		for(int i=0;i<a.length;i++)
		{
			for(int j=0;j<a[i].length;j++)
			{
				System.out.println("enter the no of students in classroom "+(j+1)+" school "+(i+1));
				a[i][j]=new int[scan.nextInt()];
			}
		}

		//now the array is created
		//ask the user to enter the age details
		for(int i=0;i<a.length;i++)
		{
			for(int j=0;j<a[i].length;j++)
			{
				for(int k=0;k<a[i][j].length;k++)
				{
					System.out.println("Enter the age of student "+(k+1)+" of classroom "+(j+1)+" in school "+(i+1) );
					a[i][j][k]=scan.nextInt();
				}
			}
		}
		//display the details
		System.out.println("The ages are: ");
		for(int i=0;i<a.length;i++)
		{
			for(int j=0;j<a[i].length;j++)
			{
				for(int k=0;k<a[i][j].length;k++)
				{
					System.out.print(a[i][j][k]+" ");
				}
				System.out.println();

			}
			System.out.println();
			System.out.println();

		}	
	}
}