  DataFrame[] splits = dataFrame.randomSplit(new double[]{0.6, 0.4}, 1234L);
    DataFrame train = splits[0];
    DataFrame test = splits[1];
  DataFrame[] splits = dataFrame.randomSplit(new double[]{0.6, 0.4}, 1234L);
    DataFrame train = splits[0];
    DataFrame test = splits[1]; | JavaMultilayerPerceptronClassifierExample.java