如何在函数中返回数字的组合？

function getNumberCombinations() {
  var combinations = [1, 2, 3, 4, 5]; // 数字的组合
  return combinations;
}

def get_number_combinations():
  combinations = "12345"  # 数字的组合
  return combinations

public class NumberCombinations {
  private int[] combinations; // 数字的组合

  public NumberCombinations(int[] combinations) {
    this.combinations = combinations;
  }

  public int[] getCombinations() {
    return combinations;
  }
}

public NumberCombinations getNumberCombinations() {
  int[] combinations = {1, 2, 3, 4, 5}; // 数字的组合
  return new NumberCombinations(combinations);
}