Something

public class Pozzle { 
char[][] grids; 

public Pozzle() { 
char[][] grids= new char[10][10];

 for (int i=0;i<a.length;i++)
      for (int j=0;j<a[i].length;j++)
      a[i][j]=r.nextInt(10);
    
    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();
    }
} 
public Pozzle(int row, int col){ 
char[][] grids = new char[row][col];

} 
public void toString(){ 
System.out.println 
}} 
//Left click to shoot, arrow keys to move. Enjoy!