double[] x = new double[10000];

		try {
			  BufferedReader br = new BufferedReader(new FileReader("data.txt"));
			  String iline = null;

			  for (int i=0; i<x.length; i++) {
				iline = br.readLine();
				x[i] = Double.parseDouble(iline);
			  }

			  Statistics stat = new Statistics(x);
			  System.out.println("平均値="+stat.getAverage());
			  System.out.println("分散="+stat.getVariance());
			  br.close();

		} catch (FileNotFoundException fe) {
			System.out.println("data.txtというファイルが開けません");
		} catch (IOException err) {
			System.out.println("IOExceptionをキャッチ"+err);
		} catch (NumberFormatException exnf) {
			System.out.println("double型でないものが含まれています");
		}