Lambdas

Main.java

import java.util.Arrays;
import java.util.stream.Collectors;

public class Main {

  public static void main(String[] args) {
    // write your code here
    System.out.println(Arrays.asList(1, 2, 3).stream().map(x -> x * x).collect(Collectors.toList()));
  }
}

x_Main.class

// class version 52.0 (52)
// access flags 0x21
public class Main {

  // compiled from: Main.java
  // access flags 0x19
  public final static INNERCLASS java/lang/invoke/MethodHandles$Lookup java/lang/invoke/MethodHandles Lookup

  // access flags 0x1
  public <init>()V
   L0
    LINENUMBER 4 L0
    ALOAD 0
    INVOKESPECIAL java/lang/Object.<init> ()V
    RETURN
   L1
    LOCALVARIABLE this LMain; L0 L1 0
    MAXSTACK = 1
    MAXLOCALS = 1

  // access flags 0x9
  public static main([Ljava/lang/String;)V
   L0
    LINENUMBER 8 L0
    GETSTATIC java/lang/System.out : Ljava/io/PrintStream;
    ICONST_3
    ANEWARRAY java/lang/Integer
    DUP
    ICONST_0
    ICONST_1
    INVOKESTATIC java/lang/Integer.valueOf (I)Ljava/lang/Integer;
    AASTORE
    DUP
    ICONST_1
    ICONST_2
    INVOKESTATIC java/lang/Integer.valueOf (I)Ljava/lang/Integer;
    AASTORE
    DUP
    ICONST_2
    ICONST_3
    INVOKESTATIC java/lang/Integer.valueOf (I)Ljava/lang/Integer;
    AASTORE
    INVOKESTATIC java/util/Arrays.asList ([Ljava/lang/Object;)Ljava/util/List;
    INVOKEINTERFACE java/util/List.stream ()Ljava/util/stream/Stream;
    INVOKEDYNAMIC apply()Ljava/util/function/Function; [
      // handle kind 0x6 : INVOKESTATIC
      java/lang/invoke/LambdaMetafactory.metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite;
      // arguments:
      (Ljava/lang/Object;)Ljava/lang/Object;, 
      // handle kind 0x6 : INVOKESTATIC
      Main.lambda$main$0(Ljava/lang/Integer;)Ljava/lang/Integer;, 
      (Ljava/lang/Integer;)Ljava/lang/Integer;
    ]
    INVOKEINTERFACE java/util/stream/Stream.map (Ljava/util/function/Function;)Ljava/util/stream/Stream;
    INVOKESTATIC java/util/stream/Collectors.toList ()Ljava/util/stream/Collector;
    INVOKEINTERFACE java/util/stream/Stream.collect (Ljava/util/stream/Collector;)Ljava/lang/Object;
    INVOKEVIRTUAL java/io/PrintStream.println (Ljava/lang/Object;)V
   L1
    LINENUMBER 9 L1
    RETURN
   L2
    LOCALVARIABLE args [Ljava/lang/String; L0 L2 0
    MAXSTACK = 5
    MAXLOCALS = 1

  // access flags 0x100A
  private static synthetic lambda$main$0(Ljava/lang/Integer;)Ljava/lang/Integer;
   L0
    LINENUMBER 8 L0
    ALOAD 0
    INVOKEVIRTUAL java/lang/Integer.intValue ()I
    ALOAD 0
    INVOKEVIRTUAL java/lang/Integer.intValue ()I
    IMUL
    INVOKESTATIC java/lang/Integer.valueOf (I)Ljava/lang/Integer;
    ARETURN
   L1
    LOCALVARIABLE x Ljava/lang/Integer; L0 L1 0
    MAXSTACK = 2
    MAXLOCALS = 1
}