Update java examples

libraries/examples/kotlin-java-example/src/test/java/test/kotlin/jtests/ArraysTest.java

@@ -0,0 +1,46 @@
+package test.kotlin.jtests;
+
+import junit.framework.TestCase;
+import kotlin.*;
+import kotlin.jvm.functions.Function1;
+
+import java.util.Collection;
+import java.util.List;
+
+import static kotlin.CollectionsKt.*;
+import static kotlin.ArraysKt.*;
+
+/**
+ * Lets try using the Kotlin standard library from Java code
+ */
+public class ArraysTest extends TestCase {
+
+    public void testArrays() throws Exception {
+        String[] array = {"foo", "bar", "x"};
+
+
+        String text = joinToString(array, ",", "(", ")", -1, "...", null);
+        System.out.println("Have text: " + text);
+        assertEquals("(foo,bar,x)", text);
+
+        Collection<String> actual = filter(array, new Function1<String, Boolean>() {
+            @Override
+            public Boolean invoke(String text) {
+                return text.length() > 1;
+            }
+        });
+
+        int[] actualArray = toIntArray(map(actual, new Function1<String, Integer>() {
+            @Override
+            public Integer invoke(String s) {
+                return s.length();
+            }
+        }));
+
+        System.out.println("Filtered list from array is " + actual);
+        assertEquals("(3,3)", joinToString(actualArray, ",", "(", ")", -1, "...", null));
+
+        int single = single(distinct(actualArray));
+        assertEquals(3, single);
+    }
+}

libraries/examples/kotlin-java-example/src/test/java/test/kotlin/jtests/CollectionTest.java

@@ -6,7 +6,7 @@ import kotlin.jvm.functions.Function1;
 import java.util.Collection;
 import java.util.List;
 
-import static kotlin.KotlinPackage.*;
+import static kotlin.CollectionsKt.*;
 
 /**
  * Lets try using the Kotlin standard library from Java code

libraries/examples/kotlin-java-example/src/test/java/test/kotlin/jtests/QualifiedNamesTest.java

@@ -0,0 +1,30 @@
+package test.kotlin.jtests;
+
+import junit.framework.TestCase;
+import java.util.*;
+import kotlin.*;
+import kotlin.jvm.functions.Function0;
+
+public class QualifiedNamesTest  extends TestCase {
+
+    public void testQualified() throws Exception {
+        List<Object> items = CollectionsKt.plus(CollectionsKt.plus(Collections.emptyList(), "item"), 1);
+        Set<Object> set = SetsKt.<Object>setOf("a", "b", "c");
+
+        assertTrue(Collections.disjoint(items, set));
+    }
+
+    public void testLazy() throws Exception {
+        Lazy<Random> randomLazy = LazyKt.lazy(new Function0<Random>() {
+            @Override
+            public Random invoke() {
+                return new Random();
+            }
+        });
+        assertFalse(randomLazy.isInitialized());
+
+        Lazy<Random> initializedLazy = LazyKt.lazyOf(randomLazy.getValue());
+        assertTrue(initializedLazy.isInitialized());
+        assertTrue(randomLazy.isInitialized());
+    }
+}