got more map code compiling to JS and running as unit tests

js/js.libraries/src/core/javalang.kt

@@ -30,6 +30,11 @@ public class UnsupportedOperationException(message: String = "") : Exception() {
 library
 public class NumberFormatException(message: String = "") : Exception() {}
 
+library
+public trait Runnable {
+    open fun run() : Unit;
+}
+
 public trait Comparable<T> {
     fun compareTo(that: T): Int
 }
@@ -39,4 +44,3 @@ public trait Appendable {
     open fun append(csq: CharSequence?, start: Int, end: Int): Appendable?
     open fun append(c: Char): Appendable?
 }
-

js/js.libraries/src/core/javautil.kt

@@ -244,3 +244,8 @@ public class StringBuilder() : Appendable {
 
 library
 public class NoSuchElementException() : Exception() {}
+
+public trait Enumeration<E> {
+    open fun hasMoreElements(): Boolean
+    open fun nextElement(): E?
+}

js/js.libraries/src/stdlib/JUMaps.kt

@@ -1,7 +1,26 @@
 package kotlin
 
-import java.util.Map as JMap
+import java.util.Map
+
 /** Provides [] access to maps */
-public fun <K, V> JMap<K, V>.set(key : K, value : V): Unit {
+public fun <K, V> Map<K, V>.set(key : K, value : V): Unit {
     this.put(key, value)
 }
+
+/**
+ * Returns a new [[HashMap]] populated with the given tuple values where the first value in each tuple
+ * is the key and the second value is the value
+ *
+ * @includeFunctionBody ../../test/MapTest.kt createUsingTuples
+ */
+public inline fun <K,V> hashMap(vararg values: #(K,V)): java.util.HashMap<K,V> {
+    val answer = java.util.HashMap<K,V>()
+    /**
+        TODO replace by this simpler call when we can pass vararg values into other methods
+        answer.putAll(values)
+    */
+    for (v in values) {
+        answer.put(v._1, v._2)
+    }
+    return answer
+}