How to solve the SWIGTYPE_p_std__complexT_double_t.java issue in SWIG

Question

SWIGTYPE_p_std__complexT_double_t.java

 /* ----------------------------------------------------------------------------
 * This file was automatically generated by SWIG (http://www.swig.org).
 * Version 4.0.2
 *
 * Do not make changes to this file unless you know what you are doing--modify
 * the SWIG interface file instead.
 * ----------------------------------------------------------------------------- */


public class SWIGTYPE_p_std__complexT_double_t {
  private transient long swigCPtr;

  protected SWIGTYPE_p_std__complexT_double_t(long cPtr, @SuppressWarnings("unused") boolean futureUse) {
    swigCPtr = cPtr;
  }

  protected SWIGTYPE_p_std__complexT_double_t() {
    swigCPtr = 0;
  }enter code here

  protected static long getCPtr(SWIGTYPE_p_std__complexT_double_t obj) {
    return (obj == null) ? 0 : obj.swigCPtr;
  }
}

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I'm using the command swig swig -c++ -java filename.i while the filename.i contains commands for parsing the c++ code to java. Adding that I'm trying to convert the complex type from c++ to java and it's here where the problem is exposed.