Fibonacci function

Fib.j

Classfile /Users/kota.mizushima/repo/Fib.class
  Last modified 2025/01/29; size 953 bytes
  SHA-256 checksum 58d114f5e4a48ff95933c8c9d90b42e8998060a6bc5f8e56fa4c1464ce4f1832
  Compiled from "Fib.java"
public class Fib
  minor version: 0
  major version: 65
  flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: #8                          // Fib
  super_class: #2                         // java/lang/Object
  interfaces: 0, fields: 0, methods: 3, 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 = Methodref          #8.#9          // Fib.fib:(I)I
   #8 = Class              #10            // Fib
   #9 = NameAndType        #11:#12        // fib:(I)I
  #10 = Utf8               Fib
  #11 = Utf8               fib
  #12 = Utf8               (I)I
  #13 = Fieldref           #14.#15        // java/lang/System.out:Ljava/io/PrintStream;
  #14 = Class              #16            // java/lang/System
  #15 = NameAndType        #17:#18        // out:Ljava/io/PrintStream;
  #16 = Utf8               java/lang/System
  #17 = Utf8               out
  #18 = Utf8               Ljava/io/PrintStream;
  #19 = InvokeDynamic      #0:#20         // #0:makeConcatWithConstants:(I)Ljava/lang/String;
  #20 = NameAndType        #21:#22        // makeConcatWithConstants:(I)Ljava/lang/String;
  #21 = Utf8               makeConcatWithConstants
  #22 = Utf8               (I)Ljava/lang/String;
  #23 = Methodref          #24.#25        // java/io/PrintStream.println:(Ljava/lang/String;)V
  #24 = Class              #26            // java/io/PrintStream
  #25 = NameAndType        #27:#28        // println:(Ljava/lang/String;)V
  #26 = Utf8               java/io/PrintStream
  #27 = Utf8               println
  #28 = Utf8               (Ljava/lang/String;)V
  #29 = Utf8               Code
  #30 = Utf8               LineNumberTable
  #31 = Utf8               StackMapTable
  #32 = Utf8               main
  #33 = Utf8               ([Ljava/lang/String;)V
  #34 = Utf8               SourceFile
  #35 = Utf8               Fib.java
  #36 = Utf8               BootstrapMethods
  #37 = String             #38            // fib(10) = \u0001
  #38 = Utf8               fib(10) = \u0001
  #39 = MethodHandle       6:#40          // REF_invokeStatic java/lang/invoke/StringConcatFactory.makeConcatWithConstants:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;
  #40 = Methodref          #41.#42        // java/lang/invoke/StringConcatFactory.makeConcatWithConstants:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;
  #41 = Class              #43            // java/lang/invoke/StringConcatFactory
  #42 = NameAndType        #21:#44        // makeConcatWithConstants:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;
  #43 = Utf8               java/lang/invoke/StringConcatFactory
  #44 = Utf8               (Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;
  #45 = Utf8               InnerClasses
  #46 = Class              #47            // java/lang/invoke/MethodHandles$Lookup
  #47 = Utf8               java/lang/invoke/MethodHandles$Lookup
  #48 = Class              #49            // java/lang/invoke/MethodHandles
  #49 = Utf8               java/lang/invoke/MethodHandles
  #50 = Utf8               Lookup
{
  public Fib();
    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 1: 0

  public static int fib(int);
    descriptor: (I)I
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
         0: iload_0
         1: iconst_2
         2: if_icmpge     7
         5: iconst_1
         6: ireturn
         7: iload_0
         8: iconst_1
         9: isub
        10: invokestatic  #7                  // Method fib:(I)I
        13: iload_0
        14: iconst_2
        15: isub
        16: invokestatic  #7                  // Method fib:(I)I
        19: iadd
        20: ireturn
      LineNumberTable:
        line 3: 0
        line 4: 7
      StackMapTable: number_of_entries = 1
        frame_type = 7 /* same */

  public static void main(java.lang.String[]);
    descriptor: ([Ljava/lang/String;)V
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=2, locals=1, args_size=1
         0: getstatic     #13                 // Field java/lang/System.out:Ljava/io/PrintStream;
         3: bipush        10
         5: invokestatic  #7                  // Method fib:(I)I
         8: invokedynamic #19,  0             // InvokeDynamic #0:makeConcatWithConstants:(I)Ljava/lang/String;
        13: invokevirtual #23                 // Method java/io/PrintStream.println:(Ljava/lang/String;)V
        16: return
      LineNumberTable:
        line 7: 0
        line 8: 16
}
SourceFile: "Fib.java"
BootstrapMethods:
  0: #39 REF_invokeStatic java/lang/invoke/StringConcatFactory.makeConcatWithConstants:(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;
    Method arguments:
      #37 fib(10) = \u0001
InnerClasses:
  public static final #50= #46 of #48;    // Lookup=class java/lang/invoke/MethodHandles$Lookup of class java/lang/invoke/MethodHandles