Insertion On Indexed Array

import java.util.*;
public class InsertIA{
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int N=5;
        int J=N; //step 1
        int[] LA = new int[20];
        int positionOfElement = 2;
        int ITEM = 99;
        for (int i=0;i<J;i++) {      //scan part not most important
            LA[i]=scan.nextInt();
        }
        for (int i=0;i<J;i++) {
            System.out.print(LA[i]+" ");
        }

        while(J>(positionOfElement - 1)){ //step 2
            LA[J]=LA[J-1]; //step 3 this statement is important
            J--;//step 4
        }
        LA[positionOfElement-1] = ITEM; //step 5
        System.out.print("\n");

        N=N+1; //step 6

        for (int i=0;i<N;i++) {
            System.out.print(LA[i]+" "); //just print it
        }
    }
}

/// main code is///

/*

while(J>(positionOfElement - 1)){ //step 2
            LA[J]=LA[J-1]; //step 3 this statement is important
            J--;//step 4
        }
        LA[positionOfElement-1] = ITEM; //step 5

*/