code: def test_new_java_array(self):
      # test array of strings
      str_list = ["a", "b", "c"]
      java_class = self.sc._gateway.jvm.java.lang.String
      java_array = JavaWrapper._new_java_array(str_list, java_class)
      self.assertEqual(_java2py(self.sc, java_array), str_list)
      # test array of integers
      int_list = [1, 2, 3]
      java_class = self.sc._gateway.jvm.java.lang.Integer
      java_array = JavaWrapper._new_java_array(int_list, java_class)
      self.assertEqual(_java2py(self.sc, java_array), int_list)
      # test array of floats
      float_list = [0.1, 0.2, 0.3]
      java_class = self.sc._gateway.jvm.java.lang.Double
      java_array = JavaWrapper._new_java_array(float_list, java_class)
      self.assertEqual(_java2py(self.sc, java_array), float_list)
      # test array of bools
      bool_list = [False, True, True]
      java_class = self.sc._gateway.jvm.java.lang.Boolean
      java_array = JavaWrapper._new_java_array(bool_list, java_class)
      self.assertEqual(_java2py(self.sc, java_array), bool_list)
      # test array of Java DenseVectors
      v1 = DenseVector([0.0, 1.0])
      v2 = DenseVector([1.0, 0.0])
      vec_java_list = [_py2java(self.sc, v1), _py2java(self.sc, v2)]
      java_class = (
          self.sc._gateway.jvm.org.apache.spark.ml.linalg.DenseVector
      )
      java_array = JavaWrapper._new_java_array(
          vec_java_list, java_class
      )
      self.assertEqual(_java2py(self.sc, java_array), [v1, v2])
      # test empty array
      java_class = self.sc._gateway.jvm.java.lang.Integer
      java_array = JavaWrapper._new_java_array([], java_class)
      self.assertEqual(_java2py(self.sc, java_array), [])
      # test array of array of strings
      str_list = [["a", "b", "c"], ["d", "e"], ["f", "g", "h", "i"], []]
      expected_str_list = [
          ("a", "b", "c", None),
          ("d", "e", None, None),
          ("f", "g", "h", "i"),
          (None, None, None, None),
      ]
      java_class = self.sc._gateway.jvm.java.lang.String
      java_array = JavaWrapper._new_java_array(str_list, java_class)
      self.assertEqual(_java2py(self.sc, java_array), expected_str_list)
  
file_path: spark/python/pyspark/ml/tests/test_wrapper.py
imports: import unittest
  import py4j
  from pyspark.ml.linalg import DenseVector, Vectors
  from pyspark.ml.regression import LinearRegression
  from pyspark.ml.wrapper import _java2py, _py2java, JavaParams, JavaWrapper
  from pyspark.testing.mllibutils import MLlibTestCase
  from pyspark.testing.mlutils import SparkSessionTestCase
  from pyspark.testing.utils import eventually
label_desc: Use image node_id 1 for calling the WrapperTests obj's underlying member method code with example usage: obj.test_new_java_array() without return types