style(test): organize imports in UvaTestRunner

Author: lzwjava

src/test/java/UvaTestRunner.java

@@ -1,14 +1,19 @@
-import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.InputStream;
 import java.io.PrintStream;
 import java.lang.reflect.Method;
-import java.nio.file.*;
-import java.util.*;
-import java.util.stream.*;
-import org.junit.jupiter.api.Test;
+import java.nio.file.FileSystems;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.List;
+import java.util.Objects;
+import java.util.stream.Collectors;
+
+import static org.junit.jupiter.api.Assertions.*;
 
 class UvaTestRunner {