diff --git a/test/com/platform/test/List2ArrayTest.java b/test/com/platform/test/List2ArrayTest.java
index 3702af9e..62e569be 100644
--- a/test/com/platform/test/List2ArrayTest.java
+++ b/test/com/platform/test/List2ArrayTest.java
@@ -1,7 +1,10 @@
 package com.platform.test;
 
 import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 import org.junit.Test;
 
@@ -24,5 +27,20 @@ public class List2ArrayTest {
 			System.out.println(string);
 		}
 	}
+	
+	@Test
+	public  void listTest() {
+		Map<String, Object> errmap = new HashMap<String, Object>();
+		List<String> sa = new ArrayList<String>();
+		sa.add("as");
+		errmap.put("err", sa);
+		List<String> errFile = new ArrayList<String>();
+		errFile.add("ss");
+		errFile.addAll((Collection<? extends String>) errmap.get("err"));
+		for (String string : errFile) {
+			
+			System.err.println(string);
+		}
+	}
 
 }