Avoid explicit array creation for vararg parameters

testData/src/pkg/TestVarArgCalls.java

@@ -0,0 +1,29 @@
+package pkg;
+
+public class TestVarArgCalls {
+  public void doSmth() {
+    printAll("Test");
+    printAll("Test: %s", "abc");
+    printAll("Test: %s - %s", "abc", "DEF");
+
+    printComplex("Test");
+    printComplex("Test: %[0]s", new String[] { "abc" });
+    printComplex("Test: %[0]s - %[0]s", new String[] { "abc" }, new String[] { "DEF" });
+
+    String.format("Test");
+    String.format("Test: %d", 123);
+    String.format("Test: %d - %s", 123, "DEF");
+
+    Object[] data = { "Hello" };
+    String.format("Test: %s", (Object) data);
+    String.format("Test: %s", (Object[]) data);
+  }
+
+  public void printAll(String fmt, String... params) {
+    System.out.println(String.format(fmt, (Object[]) params));
+  }
+
+  public void printComplex(String fmt, String[]... params) {
+    System.out.println(String.format(fmt, (Object[]) params));
+  }
+}