diff --git a/stdlib/ktSrc/Arrays.kt b/stdlib/ktSrc/Arrays.kt
new file mode 100644
index 00000000000..c8ddc2b5c70
--- /dev/null
+++ b/stdlib/ktSrc/Arrays.kt
@@ -0,0 +1,21 @@
+namespace std
+
+// Array "constructor"
+inline fun <T> array(vararg t : T) : Array<T> = t
+
+// "constructors" for primitive types array
+inline fun doubleArray(vararg content : Double)    = content
+
+inline fun floatArray(vararg content : Float)      = content
+
+inline fun longArray(vararg content : Long)        = content
+
+inline fun intArray(vararg content : Int)          = content
+
+inline fun charArray(vararg content : Char)        = content
+
+inline fun shortArray(vararg content : Short)      = content
+
+inline fun byteArray(vararg content : Byte)        = content
+
+inline fun booleanArray(vararg content : Boolean)  = content
diff --git a/stdlib/ktSrc/JavaUtil.kt b/stdlib/ktSrc/JavaUtil.kt
index ba3c74b8adb..a75df8656d9 100644
--- a/stdlib/ktSrc/JavaUtil.kt
+++ b/stdlib/ktSrc/JavaUtil.kt
@@ -1,11 +1,9 @@
-namespace std
+namespace std.util
 
-namespace util {
-    import java.util.*
+import java.util.*
 
-    val Collection<*>.size : Int
-        get() = size()
+val Collection<*>.size : Int
+    get() = size()
 
-    val Collection<*>.empty : Boolean
-        get() = isEmpty()
-}
\ No newline at end of file
+val Collection<*>.empty : Boolean
+    get() = isEmpty()
diff --git a/stdlib/ktSrc/String.kt b/stdlib/ktSrc/String.kt
new file mode 100644
index 00000000000..22e3c9864d9
--- /dev/null
+++ b/stdlib/ktSrc/String.kt
@@ -0,0 +1,59 @@
+namespace std
+
+inline fun <T> T?.plus(str: String?) : String { return toString() + str }
+
+inline fun String.lastIndexOf(s: String)  = (this as java.lang.String).lastIndexOf(s)
+
+inline fun String.lastIndexOf(s: Char) = (this as java.lang.String).lastIndexOf(s.toString()) }
+
+inline fun String.indexOf(s : String) = (this as java.lang.String).indexOf(s)
+
+inline fun String.indexOf(p0 : String, p1 : Int) = (this as java.lang.String).indexOf(p0, p1)
+
+inline fun String.replaceAll(s: String, s1 : String) = (this as java.lang.String).replaceAll(s, s1).sure()
+
+inline fun String.trim() = (this as java.lang.String).trim().sure()
+
+inline fun String.toUpperCase() = (this as java.lang.String).toUpperCase().sure()
+
+inline fun String.toLowerCase() = (this as java.lang.String).toLowerCase().sure()
+
+inline fun String.length() = (this as java.lang.String).length()
+
+inline fun String.getBytes() = (this as java.lang.String).getBytes().sure()
+
+inline fun String.toCharArray() = (this as java.lang.String).toCharArray().sure()
+
+inline fun String.format(s : String, vararg objects : Any?)  = java.lang.String.format(s, objects).sure()
+
+inline fun String.split(s : String)  = (this as java.lang.String).split(s)
+
+inline fun String.substring(i : Int) = (this as java.lang.String).substring(i).sure()
+
+inline fun String.substring(i0 : Int, i1 : Int)  = (this as java.lang.String).substring(i0, i1).sure()
+
+inline val String.size : Int
+    get() = length()
+
+inline val String.bytes : ByteArray
+    get() = getBytes()
+
+// "constructors" for String
+
+inline fun String(bytes : ByteArray, i : Int, i1 : Int, s : String) = java.lang.String(bytes, i, i1, s) as String
+
+inline fun String(bytes : ByteArray, i : Int, i1 : Int, charset : java.nio.charset.Charset) = java.lang.String(bytes, i, i1, charset) as String
+
+inline fun String(bytes : ByteArray, s : String?) = java.lang.String(bytes, s) as String
+
+inline fun String(bytes : ByteArray, charset : java.nio.charset.Charset) = java.lang.String(bytes, charset) as String
+
+inline fun String(bytes : ByteArray, i : Int, i1 : Int) = java.lang.String(bytes, i, i1) as String
+
+inline fun String(bytes : ByteArray) = java.lang.String(bytes) as String
+
+inline fun String(chars : CharArray) = java.lang.String(chars) as String
+
+inline fun String(stringBuffer : java.lang.StringBuffer) = java.lang.String(stringBuffer) as String
+
+inline fun String(stringBuilder : java.lang.StringBuilder) = java.lang.String(stringBuilder) as String