shift.java

import java.io.*;//importing io package
public class shift
{//start of class
   public static void main (String args[])throws IOException{//start of main
       BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
       System.out.println("Enter row size");
       int r=Integer.parseInt(br.readLine());//to store input value of row size
       System.out.println("Enter column size");
       int c=Integer.parseInt(br.readLine());//to store input value of column size
       int arr[][]=new int [r][c];//creating and initializing a 2D array
       System.out.println("Enter values for the array");
       for (int i=0;i<r;i++){
           for(int j=0;j<c;j++){
               arr[i][j]=Integer.parseInt(br.readLine());//storing the elements in the array
            }
        }
        System.out.println("The original array is:");
        for(int i=0;i<r;i++){
           for(int j=0;j<c;j++){
               System.out.print(arr[i][j]+"\t");//displaying the original input array
            }
            System.out.println();
        }
        int [] a1=new int[c];//creating a 1D array
        for(int i=0;i<c;i++){
            a1[i]=arr[0][i];//store the first row of 2D array in the 1D array
        }
       for (int i=1;i<r;i++){
           for(int j=0;j<c;j++){
               arr[i-1][j]=arr[i][j];//shifting the array up by one row
            }
        }
        for (int i=0;i<c;i++){
            arr[r-1][i]=a1[i];//store the elements of 1D array in last row of 2D array
        }
        System.out.println("The resultant array is:");
        for(int i=0;i<r;i++){
           for(int j=0;j<c;j++){
               System.out.print(arr[i][j]+"\t");//printing resultant 2D array
            }
            System.out.println();
        }
}//end of main method 
}//end of class







/*
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*/