Number rename: xxxValue() --> toXxx(), test

compiler/testData/codegen/boxWithJava/number/FortyTwoExtractor.java

@@ -0,0 +1,8 @@
+public class FortyTwoExtractor {
+    private Number fortyTwo = new FortyTwo();
+
+    public int intValue() {
+        return fortyTwo.intValue();
+    }
+}
+

compiler/testData/codegen/boxWithJava/number/FortyTwoExtractor.kt

@@ -0,0 +1,21 @@
+class FortyTwo : Number() {
+    override fun toByte() = 42.toByte()
+
+    override fun toShort() = 42.toShort()
+
+    override fun toInt() = 42
+
+    override fun toLong() = 42L
+
+    override fun toFloat() = 42.0f
+
+    override fun toDouble() = 42.0
+
+    override fun toChar()  = 42.toChar()    
+}
+
+fun box(): String {
+    val extractor = FortyTwoExtractor()
+    if (extractor.intValue() != 42) return "FAIL"
+    return "OK"
+}

compiler/tests/org/jetbrains/kotlin/codegen/generated/BlackBoxWithJavaCodegenTestGenerated.java

@@ -77,6 +77,12 @@ public class BlackBoxWithJavaCodegenTestGenerated extends AbstractBlackBoxCodege
         doTestWithJava(fileName);
     }
 
+    @TestMetadata("number")
+    public void testNumber() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithJava/number/");
+        doTestWithJava(fileName);
+    }
+
     @TestMetadata("platformName")
     public void testPlatformName() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("compiler/testData/codegen/boxWithJava/platformName/");

core/descriptor.loader.java/src/org/jetbrains/kotlin/load/java/specialBuiltinMembers.kt

@@ -137,6 +137,12 @@ object BuiltinSpecialMethods {
     val REMOVE_AT_FQ_NAME = FqName("kotlin.MutableList.removeAt")
 
     val FQ_NAMES_TO_JVM_MAP: Map<FqName, Name> = mapOf(
+            FqName("kotlin.Number.toByte")    to Name.identifier("byteValue"),
+            FqName("kotlin.Number.toShort")   to Name.identifier("shortValue"),
+            FqName("kotlin.Number.toInt")     to Name.identifier("intValue"),
+            FqName("kotlin.Number.toLong")    to Name.identifier("longValue"),
+            FqName("kotlin.Number.toFloat")   to Name.identifier("floatValue"),
+            FqName("kotlin.Number.toDouble")  to Name.identifier("doubleValue"),
             REMOVE_AT_FQ_NAME                 to Name.identifier("remove"),
             FqName("kotlin.CharSequence.get") to Name.identifier("charAt")
     )