read java class in the text file and convert to pojo

I have a text file with the name A.text.

A.text

package com.example;

public final class R {
    public static final class ArrayClass {
    public static final int a=0x7f030000;
    public static final int b=0x7f030001;
    public static final int c=0x7f030002;
  }
    public static final class StringClass {
    public static final int aa=0x7f030000;
    public static final int bb=0x7f030001;
    public static final int cc=0x7f030002;
  }
}

I read this class in java or Kotlin and save in a variable with name text.

String text = "package com.example; public final class R { ..."

how can convert to class?

I need a library like Gson for converting JSON to class.