diff --git a/hutool-core/src/main/java/cn/hutool/core/io/FileUtil.java b/hutool-core/src/main/java/cn/hutool/core/io/FileUtil.java
index 36955b0c8..bd778e7f5 100644
--- a/hutool-core/src/main/java/cn/hutool/core/io/FileUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/io/FileUtil.java
@@ -3582,6 +3582,7 @@ public class FileUtil {
     /**
      * 获取当前文件夹, 不管是否在jar包中都会返回文件夹的路径
      * class在jar包中返回jar所在文件夹,class不在jar中返回文件夹目录
+     * jdk中的类不能使用此方法
      */
     public static String getCurrentDir(Class clazz) {
         String currentDir = null;
diff --git a/hutool-core/src/test/java/cn/hutool/core/io/file/TailerTest.java b/hutool-core/src/test/java/cn/hutool/core/io/file/TailerTest.java
index 50263d484..80746f796 100644
--- a/hutool-core/src/test/java/cn/hutool/core/io/file/TailerTest.java
+++ b/hutool-core/src/test/java/cn/hutool/core/io/file/TailerTest.java
@@ -1,23 +1,31 @@
 package cn.hutool.core.io.file;
 
-import org.junit.Ignore;
-import org.junit.Test;
-
 import cn.hutool.core.io.FileUtil;
 import cn.hutool.core.util.CharsetUtil;
+import lombok.Data;
+import org.junit.Ignore;
+import org.junit.Test;
 
 public class TailerTest {
-	
-	@Test
-	@Ignore
-	public void tailTest() {
-		FileUtil.tail(FileUtil.file("e:/tail.txt"), CharsetUtil.CHARSET_GBK);
-	}
-	
-	@Test
-	@Ignore
-	public void tailWithLinesTest() {
-		Tailer tailer = new Tailer(FileUtil.file("f:/test/test.log"), Tailer.CONSOLE_HANDLER, 2);
-		tailer.start();
-	}
+
+    @Test
+    @Ignore
+    public void tailTest() {
+        FileUtil.tail(FileUtil.file("e:/tail.txt"), CharsetUtil.CHARSET_GBK);
+    }
+
+    @Test
+    @Ignore
+    public void tailWithLinesTest() {
+        Tailer tailer = new Tailer(FileUtil.file("f:/test/test.log"), Tailer.CONSOLE_HANDLER, 2);
+        tailer.start();
+    }
+
+    @Test
+    @Ignore
+    public void testDir() {
+        System.out.println(FileUtil.getCurrentDir(FileUtil.class));
+        System.out.println(FileUtil.getCurrentDir(Data.class));
+        System.out.println(FileUtil.getCurrentDir(Test.class));
+    }
 }