Remove java.util.* imports from common code.

libraries/stdlib/src/kotlin/collections/Arrays.kt

@@ -20,8 +20,6 @@
 
 package kotlin.collections
 
-import java.util.*
-
 
 /** Returns the array if it's not `null`, or an empty array otherwise. */
 public inline fun <reified T> Array<out T>?.orEmpty(): Array<out T> = this ?: arrayOf<T>()

libraries/stdlib/src/kotlin/collections/Collections.kt

@@ -19,7 +19,6 @@
 
 package kotlin.collections
 
-import java.util.*
 import kotlin.comparisons.compareValues
 
 internal object EmptyIterator : ListIterator<Nothing> {
@@ -89,7 +88,7 @@ public inline fun <T> listOf(): List<T> = emptyList()
  * The returned list is serializable.
  */
 @JvmVersion
-public fun <T> listOf(element: T): List<T> = Collections.singletonList(element)
+public fun <T> listOf(element: T): List<T> = java.util.Collections.singletonList(element)
 
 /** Returns a new [MutableList] with the given elements. */
 public fun <T> mutableListOf(vararg elements: T): MutableList<T>
@@ -137,7 +136,7 @@ public inline fun <T> List<T>?.orEmpty(): List<T> = this ?: emptyList()
  */
 @JvmVersion
 @kotlin.internal.InlineOnly
-public inline fun <T> Enumeration<T>.toList(): List<T> = Collections.list(this)
+public inline fun <T> java.util.Enumeration<T>.toList(): List<T> = java.util.Collections.list(this)
 
 /**
  * Checks if all elements in the specified collection are contained in this collection.
@@ -160,7 +159,7 @@ private fun <T> Array<out T>.copyToArrayOfAny(isVarargs: Boolean): Array<Any?> =
             // if the array came from varargs and already is array of Any, copying isn't required
             @Suppress("UNCHECKED_CAST") (this as Array<Any?>)
         else
-            Arrays.copyOf(this, this.size, Array<Any?>::class.java)
+            java.util.Arrays.copyOf(this, this.size, Array<Any?>::class.java)
 
 /**
  * Searches this list or its range for the provided [element] using the binary search algorithm.

libraries/stdlib/src/kotlin/collections/Iterators.kt

@@ -3,13 +3,11 @@
 
 package kotlin.collections
 
-import java.util.*
-
 /**
  * Creates an [Iterator] for an [Enumeration], allowing to use it in `for` loops.
  */
 @kotlin.jvm.JvmVersion
-public operator fun <T> Enumeration<T>.iterator(): Iterator<T> = object : Iterator<T> {
+public operator fun <T> java.util.Enumeration<T>.iterator(): Iterator<T> = object : Iterator<T> {
     override fun hasNext(): Boolean = hasMoreElements()
 
     public override fun next(): T = nextElement()

libraries/stdlib/src/kotlin/collections/MapWithDefault.kt

@@ -3,8 +3,6 @@
 
 package kotlin.collections
 
-import java.util.*
-
 /**
  * Returns the value for the given key, or the implicit default value for this map.
  * By default no implicit value is provided for maps and a [NoSuchElementException] is thrown.

libraries/stdlib/src/kotlin/collections/Maps.kt

@@ -3,8 +3,6 @@
 
 package kotlin.collections
 
-import java.util.*
-
 private object EmptyMap : Map<Any?, Nothing>, Serializable {
     private const val serialVersionUID: Long = 8246714829545688274
 
@@ -47,7 +45,7 @@ public inline fun <K, V> mapOf(): Map<K, V> = emptyMap()
  * specified value.  The returned map is serializable.
  */
 @JvmVersion
-public fun <K, V> mapOf(pair: Pair<K, V>): Map<K, V> = Collections.singletonMap(pair.first, pair.second)
+public fun <K, V> mapOf(pair: Pair<K, V>): Map<K, V> = java.util.Collections.singletonMap(pair.first, pair.second)
 
 /**
  * Returns a new [MutableMap] with the specified contents, given as a list of pairs
@@ -568,4 +566,4 @@ internal inline fun <K, V> Map<K, V>.toSingletonMapOrSelf(): Map<K, V> = toSingl
 // creates a singleton copy of map
 @kotlin.jvm.JvmVersion
 internal fun <K, V> Map<out K, V>.toSingletonMap(): Map<K, V>
-    = with (entries.iterator().next()) { Collections.singletonMap(key, value) }
+    = with (entries.iterator().next()) { java.util.Collections.singletonMap(key, value) }

libraries/stdlib/src/kotlin/collections/MutableCollections.kt

@@ -3,8 +3,6 @@
 
 package kotlin.collections
 
-import java.util.*
-
 /**
  * Removes a single instance of the specified element from this
  * collection, if it is present.

libraries/stdlib/src/kotlin/collections/Sequences.kt

@@ -3,8 +3,6 @@
 
 package kotlin.sequences
 
-import java.util.*
-
 /**
  * Given an [iterator] function constructs a [Sequence] that returns values through the [Iterator]
  * provided by that function.
@@ -25,7 +23,7 @@ public fun <T> Iterator<T>.asSequence(): Sequence<T> = Sequence { this }.constra
  */
 @kotlin.jvm.JvmVersion
 @kotlin.internal.InlineOnly
-public inline fun<T> Enumeration<T>.asSequence(): Sequence<T> = this.iterator().asSequence()
+public inline fun<T> java.util.Enumeration<T>.asSequence(): Sequence<T> = this.iterator().asSequence()
 
 /**
  * Creates a sequence that returns the specified values.

libraries/stdlib/src/kotlin/collections/Sets.kt

@@ -3,8 +3,6 @@
 
 package kotlin.collections
 
-import java.util.*
-
 
 internal object EmptySet : Set<Nothing>, Serializable {
     private const val serialVersionUID: Long = 3406603774387020532
@@ -61,7 +59,7 @@ public inline fun <T> Set<T>?.orEmpty(): Set<T> = this ?: emptySet()
  * The returned set is serializable.
  */
 @JvmVersion
-public fun <T> setOf(element: T): Set<T> = Collections.singleton(element)
+public fun <T> setOf(element: T): Set<T> = java.util.Collections.singleton(element)
 
 
 /**