Java this and wut

Main.java

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

public class Main {
    public static void main(String[] args) {
        Main main = new Main();
        main.foo();
        main.bar();
        main.baz();
        main.qux();
    }

    void foo() {
        System.out.println("Foo");
    }

    void bar(Main this) {
        System.out.println("Bar");
    }

    void baz(@SrcAnnotation Main this) {
        System.out.println("Baz");
    }

    void qux(@RTAnnotation Main this) {
        System.out.println("qux");
    }

    @Retention(RetentionPolicy.CLASS)
    @Target({ElementType.PARAMETER, ElementType.TYPE_PARAMETER, ElementType.TYPE_USE})
    @interface SrcAnnotation {}

    @Retention(RetentionPolicy.RUNTIME)
    @Target({ElementType.PARAMETER, ElementType.TYPE_PARAMETER, ElementType.TYPE_USE})
    @interface RTAnnotation {}
}

Main.javap

progrm_jarvis@PROgrm-JARvis:~/1$ javac Main.java && javap -c -v Main.class
Classfile /home/progrm_jarvis/1/Main.class
  Last modified 21 нояб. 2019 г.; size 944 bytes
  SHA-256 checksum 5c2d208eec4a8ba962612cfa2fef00c9084e72071c785261d44fb91240997e9e
  Compiled from "Main.java"
public class Main
  minor version: 0
  major version: 57
  flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: #7                          // Main
  super_class: #2                         // java/lang/Object
  interfaces: 0, fields: 0, methods: 6, attributes: 3
Constant pool:
   #1 = Methodref          #2.#3          // java/lang/Object."<init>":()V
   #2 = Class              #4             // java/lang/Object
   #3 = NameAndType        #5:#6          // "<init>":()V
   #4 = Utf8               java/lang/Object
   #5 = Utf8               <init>
   #6 = Utf8               ()V
   #7 = Class              #8             // Main
   #8 = Utf8               Main
   #9 = Methodref          #7.#3          // Main."<init>":()V
  #10 = Methodref          #7.#11         // Main.foo:()V
  #11 = NameAndType        #12:#6         // foo:()V
  #12 = Utf8               foo
  #13 = Methodref          #7.#14         // Main.bar:()V
  #14 = NameAndType        #15:#6         // bar:()V
  #15 = Utf8               bar
  #16 = Methodref          #7.#17         // Main.baz:()V
  #17 = NameAndType        #18:#6         // baz:()V
  #18 = Utf8               baz
  #19 = Methodref          #7.#20         // Main.qux:()V
  #20 = NameAndType        #21:#6         // qux:()V
  #21 = Utf8               qux
  #22 = Fieldref           #23.#24        // java/lang/System.out:Ljava/io/PrintStream;
  #23 = Class              #25            // java/lang/System
  #24 = NameAndType        #26:#27        // out:Ljava/io/PrintStream;
  #25 = Utf8               java/lang/System
  #26 = Utf8               out
  #27 = Utf8               Ljava/io/PrintStream;
  #28 = String             #29            // Foo
  #29 = Utf8               Foo
  #30 = Methodref          #31.#32        // java/io/PrintStream.println:(Ljava/lang/String;)V
  #31 = Class              #33            // java/io/PrintStream
  #32 = NameAndType        #34:#35        // println:(Ljava/lang/String;)V
  #33 = Utf8               java/io/PrintStream
  #34 = Utf8               println
  #35 = Utf8               (Ljava/lang/String;)V
  #36 = String             #37            // Bar
  #37 = Utf8               Bar
  #38 = String             #39            // Baz
  #39 = Utf8               Baz
  #40 = String             #21            // qux
  #41 = Utf8               Code
  #42 = Utf8               LineNumberTable
  #43 = Utf8               main
  #44 = Utf8               ([Ljava/lang/String;)V
  #45 = Utf8               RuntimeInvisibleTypeAnnotations
  #46 = Utf8               LMain$RTAnnotation;
  #47 = Utf8               SourceFile
  #48 = Utf8               Main.java
  #49 = Utf8               NestMembers
  #50 = Class              #51            // Main$RTAnnotation
  #51 = Utf8               Main$RTAnnotation
  #52 = Class              #53            // Main$SrcAnnotation
  #53 = Utf8               Main$SrcAnnotation
  #54 = Utf8               InnerClasses
  #55 = Utf8               RTAnnotation
  #56 = Utf8               SrcAnnotation
{
  public Main();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
         0: aload_0
         1: invokespecial #1                  // Method java/lang/Object."<init>":()V
         4: return
      LineNumberTable:
        line 6: 0

  public static void main(java.lang.String[]);
    descriptor: ([Ljava/lang/String;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=2, args_size=1
         0: new           #7                  // class Main
         3: dup
         4: invokespecial #9                  // Method "<init>":()V
         7: astore_1
         8: aload_1
         9: invokevirtual #10                 // Method foo:()V
        12: aload_1
        13: invokevirtual #13                 // Method bar:()V
        16: aload_1
        17: invokevirtual #16                 // Method baz:()V
        20: aload_1
        21: invokevirtual #19                 // Method qux:()V
        24: return
      LineNumberTable:
        line 8: 0
        line 9: 8
        line 10: 12
        line 11: 16
        line 12: 20
        line 13: 24

  void foo();
    descriptor: ()V
    flags: (0x0000)
    Code:
      stack=2, locals=1, args_size=1
         0: getstatic     #22                 // Field java/lang/System.out:Ljava/io/PrintStream;
         3: ldc           #28                 // String Foo
         5: invokevirtual #30                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
         8: return
      LineNumberTable:
        line 16: 0
        line 17: 8

  void bar();
    descriptor: ()V
    flags: (0x0000)
    Code:
      stack=2, locals=1, args_size=1
         0: getstatic     #22                 // Field java/lang/System.out:Ljava/io/PrintStream;
         3: ldc           #36                 // String Bar
         5: invokevirtual #30                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
         8: return
      LineNumberTable:
        line 20: 0
        line 21: 8

  void baz();
    descriptor: ()V
    flags: (0x0000)
    Code:
      stack=2, locals=1, args_size=1
         0: getstatic     #22                 // Field java/lang/System.out:Ljava/io/PrintStream;
         3: ldc           #38                 // String Baz
         5: invokevirtual #30                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
         8: return
      LineNumberTable:
        line 24: 0
        line 25: 8

  void qux();
    descriptor: ()V
    flags: (0x0000)
    Code:
      stack=2, locals=1, args_size=1
         0: getstatic     #22                 // Field java/lang/System.out:Ljava/io/PrintStream;
         3: ldc           #40                 // String qux
         5: invokevirtual #30                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
         8: return
      LineNumberTable:
        line 28: 0
        line 29: 8
    RuntimeInvisibleTypeAnnotations:
      0: #46(): METHOD_RECEIVER
        Main$RTAnnotation
}
SourceFile: "Main.java"
NestMembers:
  Main$RTAnnotation
  Main$SrcAnnotation
InnerClasses:
  static #55= #50 of #7;                  // RTAnnotation=class Main$RTAnnotation of class Main
  static #56= #52 of #7;                  // SrcAnnotation=class Main$SrcAnnotation of class Main