BPResult.java

package bp.logic;

class BPResult {
  int bulls;
	int cows;
	
	bool is_winner() { ... }
	
	BPResult( int bulls, int cows) {}
}

BPResult.js

(function(global) {

  global.bp.logic.BPResult = function( bulls, cows ) {
    var self = this;

    self.bulls = bulls;
    self.cows  = cows;

    self.is_winner = function() {
      return self.bulls === 4;
    };
  };


}(this));