Test2$.java

Compiled from "Test2.scala"
public final class Test2$ {
  public static final Test2$ MODULE$;

  public static {};
    Code:
       0: new           #2                  // class Test2$
       3: dup
       4: invokespecial #20                 // Method "<init>":()V
       7: putstatic     #22                 // Field MODULE$:LTest2$;
      10: return
    LineNumberTable:
      line 1: 0

  public void main(java.lang.String[]);
    Code:
       0: getstatic     #28                 // Field Test2$Foo$.MODULE$:LTest2$Foo$;
       3: invokevirtual #32                 // Method Test2$Foo$.empty:()LTest2$Foo;
       6: pop
       7: return
    LineNumberTable:
      line 7: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       8     0  this   LTest2$;
          0       8     1  args   [Ljava/lang/String;

  private Test2$();
    Code:
       0: aload_0
       1: invokespecial #35                 // Method java/lang/Object."<init>":()V
       4: return
    LineNumberTable:
      line 9: 0
      line 1: 4
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       5     0  this   LTest2$;
}

Test2$Foo$.java

Compiled from "Test2.scala"
public class Test2$Foo$ implements java.io.Serializable {
  public static final Test2$Foo$ MODULE$;

  private static final Test2$Foo empty;

  public static {};
    Code:
       0: new           #2                  // class Test2$Foo$
       3: dup
       4: invokespecial #22                 // Method "<init>":()V
       7: putstatic     #24                 // Field MODULE$:LTest2$Foo$;
      10: new           #9                  // class Test2$Foo
      13: dup
      14: invokespecial #25                 // Method Test2$Foo."<init>":()V
      17: putstatic     #27                 // Field empty:LTest2$Foo;
      20: return
    LineNumberTable:
      line 4: 0

  public Test2$Foo empty();
    Code:
       0: getstatic     #27                 // Field empty:LTest2$Foo;
       3: areturn
    LineNumberTable:
      line 4: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       4     0  this   LTest2$Foo$;

  public Test2$Foo apply();
    Code:
       0: new           #9                  // class Test2$Foo
       3: dup
       4: invokespecial #25                 // Method Test2$Foo."<init>":()V
       7: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       8     0  this   LTest2$Foo$;

  public boolean unapply(Test2$Foo);
    Code:
       0: aload_1
       1: ifnonnull     8
       4: iconst_0
       5: goto          9
       8: iconst_1
       9: ireturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0      10     0  this   LTest2$Foo$;
          0      10     1   x$0   LTest2$Foo;

  private java.lang.Object writeReplace();
    Code:
       0: new           #37                 // class scala/runtime/ModuleSerializationProxy
       3: dup
       4: ldc           #2                  // class Test2$Foo$
       6: invokespecial #40                 // Method scala/runtime/ModuleSerializationProxy."<init>":(Ljava/lang/Class;)V
       9: areturn
    LineNumberTable:
      line 4: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0      10     0  this   LTest2$Foo$;

  public Test2$Foo$();
    Code:
       0: aload_0
       1: invokespecial #41                 // Method java/lang/Object."<init>":()V
       4: return
    LineNumberTable:
      line 6: 0
      line 4: 4
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       5     0  this   LTest2$Foo$;
}

Test2$Foo.java

Compiled from "Test2.scala"
public class Test2$Foo implements scala.Product,java.io.Serializable {
  public scala.collection.Iterator<java.lang.String> productElementNames();
    Code:
       0: aload_0
       1: invokestatic  #19                 // InterfaceMethod scala/Product.productElementNames$:(Lscala/Product;)Lscala/collection/Iterator;
       4: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       5     0  this   LTest2$Foo;

  public Test2$Foo copy();
    Code:
       0: new           #2                  // class Test2$Foo
       3: dup
       4: invokespecial #27                 // Method "<init>":()V
       7: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       8     0  this   LTest2$Foo;

  public java.lang.String productPrefix();
    Code:
       0: ldc           #30                 // String Foo
       2: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       3     0  this   LTest2$Foo;

  public int productArity();
    Code:
       0: iconst_0
       1: ireturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       2     0  this   LTest2$Foo;

  public java.lang.Object productElement(int);
    Code:
       0: iload_1
       1: istore_3
       2: iload_1
       3: invokestatic  #40                 // Method scala/runtime/Statics.ioobe:(I)Ljava/lang/Object;
       6: astore_2
       7: goto          10
      10: aload_2
      11: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0      12     0  this   LTest2$Foo;
          0      12     1   x$1   I

  public scala.collection.Iterator<java.lang.Object> productIterator();
    Code:
       0: getstatic     #49                 // Field scala/runtime/ScalaRunTime$.MODULE$:Lscala/runtime/ScalaRunTime$;
       3: aload_0
       4: invokevirtual #52                 // Method scala/runtime/ScalaRunTime$.typedProductIterator:(Lscala/Product;)Lscala/collection/Iterator;
       7: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       8     0  this   LTest2$Foo;

  public boolean canEqual(java.lang.Object);
    Code:
       0: aload_1
       1: instanceof    #2                  // class Test2$Foo
       4: ireturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       5     0  this   LTest2$Foo;
          0       5     1   x$1   Ljava/lang/Object;

  public java.lang.String productElementName(int);
    Code:
       0: iload_1
       1: istore_3
       2: iload_1
       3: invokestatic  #40                 // Method scala/runtime/Statics.ioobe:(I)Ljava/lang/Object;
       6: checkcast     #59                 // class java/lang/String
       9: astore_2
      10: goto          13
      13: aload_2
      14: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0      15     0  this   LTest2$Foo;
          0      15     1   x$1   I

  public int hashCode();
    Code:
       0: getstatic     #49                 // Field scala/runtime/ScalaRunTime$.MODULE$:Lscala/runtime/ScalaRunTime$;
       3: aload_0
       4: invokevirtual #64                 // Method scala/runtime/ScalaRunTime$._hashCode:(Lscala/Product;)I
       7: ireturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       8     0  this   LTest2$Foo;

  public java.lang.String toString();
    Code:
       0: getstatic     #49                 // Field scala/runtime/ScalaRunTime$.MODULE$:Lscala/runtime/ScalaRunTime$;
       3: aload_0
       4: invokevirtual #69                 // Method scala/runtime/ScalaRunTime$._toString:(Lscala/Product;)Ljava/lang/String;
       7: areturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       8     0  this   LTest2$Foo;

  public boolean equals(java.lang.Object);
    Code:
       0: aload_1
       1: astore_3
       2: aload_3
       3: instanceof    #2                  // class Test2$Foo
       6: ifeq          14
       9: iconst_1
      10: istore_2
      11: goto          22
      14: goto          17
      17: iconst_0
      18: istore_2
      19: goto          22
      22: iload_2
      23: ifeq          41
      26: aload_1
      27: checkcast     #2                  // class Test2$Foo
      30: aload_0
      31: invokevirtual #72                 // Method canEqual:(Ljava/lang/Object;)Z
      34: ifeq          41
      37: iconst_1
      38: goto          42
      41: iconst_0
      42: ireturn
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0      43     0  this   LTest2$Foo;
          0      43     1   x$1   Ljava/lang/Object;

  public Test2$Foo();
    Code:
       0: aload_0
       1: invokespecial #73                 // Method java/lang/Object."<init>":()V
       4: aload_0
       5: invokestatic  #77                 // InterfaceMethod scala/Product.$init$:(Lscala/Product;)V
       8: return
    LineNumberTable:
      line 3: 0
    LocalVariableTable:
      Start  Length  Slot  Name   Signature
          0       9     0  this   LTest2$Foo;
}

Test2.java

Compiled from "Test2.scala"
public final class Test2 {
  public static void main(java.lang.String[]);
    Code:
       0: getstatic     #23                 // Field Test2$.MODULE$:LTest2$;
       3: aload_0
       4: invokevirtual #25                 // Method Test2$.main:([Ljava/lang/String;)V
       7: return
}

Test2.scala

object Test2 {

  case class Foo()
  object Foo { val empty = Foo() }

  def main(args: Array[String]): Unit = {
    Foo.empty
  }
}