private static void printResult() {
		Iterator<Entry<String, Integer>> iter = class_number.entrySet().iterator(); 
		while (iter.hasNext()) { 
		    Entry<String, Integer> entry = iter.next(); 
		    String key = entry.getKey(); 
		    int val = entry.getValue(); 
		 
		    System.out.println("\t"+key + "\t: " + val);
		}
		
		for (int j = 0; j < classes; j++){
			System.out.print("\t" + j);
		}
		System.out.println();
		
		
		for(int i = 0; i < classes; i++){
			for (int j = 0; j < classes; j++){
				System.out.print("\t" + cm[i][j]);
			}
			System.out.println();
		}
		
	}