Check signature

Use javap to check the signature of class with debug build.

$ javap -help
Usage: javap <options> <classes>
where possible options include:
  -help  --help  -?        Print this usage message
  -version                 Version information
  -v  -verbose             Print additional information
  -l                       Print line number and local variable tables
  -public                  Show only public classes and members
  -protected               Show protected/public classes and members
  -package                 Show package/protected/public classes
                           and members (default)
  -p  -private             Show all classes and members
  -c                       Disassemble the code
  -s                       Print internal type signatures
  -sysinfo                 Show system info (path, size, date, MD5 hash)
                           of class being processed
  -constants               Show final constants
  -classpath <path>        Specify where to find user class files
  -cp <path>               Specify where to find user class files
  -bootclasspath <path>    Override location of bootstrap class files

$ cd /Users/HSY/Desktop/NativeDemo/app/build/tmp/kotlin-classes/debug
ses HSY$ cd debug/
$ javap -s -p com.practice.Counter
Compiled from "Counter.kt"
public final class com.practice.Counter {
  private int count;
    descriptor: I
  private static final java.lang.String NAME;
    descriptor: Ljava/lang/String;
  public static final com.practice.Counter$Companion Companion;
    descriptor: Lcom/practice/Counter$Companion;
  public final void add();
    descriptor: ()V

  public final int count();
    descriptor: ()I

  public com.practice.Counter();
    descriptor: ()V

  static {};
    descriptor: ()V

  public static final int access$getCount$p(com.practice.Counter);
    descriptor: (Lcom/practice/Counter;)I

  public static final void access$setCount$p(com.practice.Counter, int);
    descriptor: (Lcom/practice/Counter;I)V
}

• Counter.kt

  package com.practice
  
  class Counter {
  
      companion object {
          private const val NAME = "kkbox"
  
          fun getName(): String {
              return NAME
          }
      }
  
      private var count = 0
  
      fun add() {
          count++
      }
  
      fun count(): Int {
          return count
      }
  
      inner class Comparator(val name: String) {
  
          fun isSameAs(num: Int): Boolean {
              return num == count
          }
      }
  }
  

• for inner class

  $ javap -s -p com/practice/Counter\$Comparator.class 
  Compiled from "Counter.kt"
  public final class com.practice.Counter$Comparator {
    private final java.lang.String name;
      descriptor: Ljava/lang/String;
    final com.practice.Counter this$0;
      descriptor: Lcom/practice/Counter;
    public final boolean isSameAs(int);
      descriptor: (I)Z
  
    public final java.lang.String getName();
      descriptor: ()Ljava/lang/String;
  
    public com.practice.Counter$Comparator(java.lang.String);
      descriptor: (Lcom/practice/Counter;Ljava/lang/String;)V
  }