gistfile1.scala

lucmac:sandbox luc$ cat Test.java 
public interface Test {
  default int foo() { return 1; }
  int bar();
}
lucmac:sandbox luc$ javac Test.java 
lucmac:sandbox luc$ scala
Java HotSpot(TM) 64-Bit Server VM warning: ignoring option MaxPermSize=512M; support was removed in 8.0
Welcome to Scala version 2.11.4 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_25).
Type in expressions to have them evaluated.
Type :help for more information.

scala> class A extends Test { def bar() = super.foo() }
defined class A

scala> :javap A
  public int bar();
    descriptor: ()I
    flags: ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
         0: aload_0
         1: invokespecial #12                 // Method Test.foo:()I
         4: ireturn
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            0       5     0  this   LA;
      LineNumberTable:
        line 7: 0