val和var和Java

 object Hello
   {
           def main(args :Array[String])
           {
                   var i =
                   val k = i
           }

}

jvm代码

public final class Hello$ {
  public static Hello$ MODULE$;

  public static {};
    Code:
       : new           #                  // class Hello$
       : invokespecial #                 // Method "<init>":()V
       : return

  public void main(java.lang.String[]);
    Code:
       : iconst_1
       : istore_2
       : iload_2
       : istore_3
       : return
}

-------Java

  public class Hello2
   {

     public static void main(String args[])
     {
           int i = ;
           int k = i;
     }

  }

public class Hello2 {
  public Hello2();
    Code:
       : aload_0
       : invokespecial #                  // Method java/lang/Object."<init>":()V
       : return

  public static void main(java.lang.String[]);
    Code:
       : iconst_1
       : istore_1
       : iload_1
       : istore_2
       : return
}