Converter tests:

Change test data files extension to "java"

j2k/tests/testData/ast/issues/kt-824.java

@@ -0,0 +1,26 @@
+//file
+package demo;
+
+class Container {
+  boolean myBoolean = true;
+}
+
+class One {
+  static Container myContainer = new Container();
+}
+
+class Test {
+  void test() {
+    if (One.myContainer.myBoolean)
+      System.out.println("Ok");
+
+    String s = One.myContainer.myBoolean ? "YES" : "NO";
+
+    while (One.myContainer.myBoolean)
+      System.out.println("Ok");
+
+    do {
+      System.out.println("Ok");
+    } while (One.myContainer.myBoolean)
+  }
+}