Transferring User Input Into an Array

Question

I want the user to input whats inside the matrix so I tell them "Enter Row 1 of Matrix 1: " Say for example they entered the length of the square matrix as 3, I would then want them to enter something like "1 2 3" as Row 1. With my current code I get:
3 3 3
3 3 3
3 3 3
I cant figure out what I should change so that its:
1 2 3
1 2 3
1 2 3
Thanks so much for any help. Heres the code so far:
import java.util.Scanner;
public class MatrixAddPro
  public static void main (String[] args)
     int row1, col1;
     Scanner scan = new Scanner(System.in);
     System.out.println("Enter the length of the square matrix: ");
     col1 = scan.nextInt(); 
     int[][] a = new int[col1][col1];
     System.out.println("Enter Row 1 of Matrix1: ");
     while(scan.hasNext())
     a[1][1] = scan.nextInt();
     //for (int row = 0; row < a.length; row++)
        //for (int col = 0; col < a[row].length; col++)
           //a[col1][col1] = scan.nextInt();
     for (int row = 0; row < a.length; row++)
        for (int col = 0; col < a[row].length; col++)     
           System.out.print(a[1][1] + "\t");
        System.out.println();  
}

Answer 1

import java.util.Scanner;
public class MatrixAddPro
  public static void main (String[] args)
     int input, row, col;
     Scanner scan = new Scanner(System.in);
     System.out.println("Enter the length of the square matrix: ");
     col = scan.nextInt(); 
     row = col;
     int[][] a = new int[row][col];
     for (int x = 0; x < row; x++)
        for (int y = 0; y < col; y++)
           {System.out.println("Enter Row"+(x+1)+" Col"+ (y+1));
           input = scan.nextInt();
           a[x][y] = input;
     for (int x = 0; x < row; x++)
        for (int y = 0; y < col; y++)     
           {System.out.print(a[x][y] + "\t");
           System.out.println();      
}OUTPUT:
Enter the length of the square matrix:
3
Enter Row1 Col1
1
Enter Row1 Col2
2
Enter Row1 Col3
3
Enter Row2 Col1
1
Enter Row2 Col2
2
Enter Row2 Col3
3
Enter Row3 Col1
1
Enter Row3 Col2
2
Enter Row3 Col3
3
1
2
3
1
2
3
1
2
3
Alright so now its not printing in rows...
Thanks for your patience/help guys.