class Stuff {
    // instance vars:

       private _______ x = __________ ; // create int array with 3 defaults

       private _______ y ;              // declare int array
 
       private _______ z = __________ ; // create array with ints 1,2,3,4

    // constructor:
    
       public Stuff(int n) {
  
 	   __________________________ ; // create $y$ array with size $n$

	   __________________________ ; // fill $y$ with random values

       }

    // Fill $y$ with random values 0 or 1:

       ____________  _____________  fillY() {
	   
	   for (int i = ____ ; ______________________ ; _________ )

	       _______________________________________________ ;

       }

    // Choose array and return it:
    
       public ___________ getArray(int choice) {
	   
	   int[] a;
	   
	   switch( ___________________ ) {
	       
	   case 1:  a = x; break;
	   case 2:  a = y; break;
	   case 3:  a = z; break;
	       
	   default: a = _____________________ ; break; // return empty array
	   }
	   return _____________ ;
       }
} // class Stuff

public class classWithArrays {
    public static void main(String[] args) {
	Stuff s = new Stuff(5);
	print(s.getArray(1));
	print(s.getArray(2));
	print(s.getArray(3));
	print(s.getArray(10));
    }
    public static void print(int[] v) {

	for (int i = ________ ; ______________ ; _______ )
	    System.out.print(v[i] + " ");
	System.out.println();
    }
} // class classWithArrays