diff --git a/src/main/java/com/pancm/basics/MapTest.java b/src/main/java/com/pancm/basics/MapTest.java
index 1587d23..df4b5bc 100644
--- a/src/main/java/com/pancm/basics/MapTest.java
+++ b/src/main/java/com/pancm/basics/MapTest.java
@@ -1,123 +1,124 @@
-package com.pancm.basics;
-
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.TreeMap;
-
-/**
- * 
-* Title: MapTest
-* Description:集合map测试 
-* Version:1.0.0  
-* @author pancm
-* @date 2017年11月16日
- */
-public class MapTest {
-	private static Map<String,String> map = new HashMap<String,String>();
-	
-	public static Map<String,String> getHashMap(){
-		if(map == null || map.isEmpty()){
-			map = new HashMap<String,String>();
-		}
-		return  map;
-	}
-	
-	public static void main(String[] args) {
-		//普通的HashMap 
-//		Map<String,String> map=mapTest.getHashMap();
-//		map.put("a", "1");
-//		map.put("b", "1");
-//		map.put("c", "e");
-//		System.out.println(map.toString());
-//		Map<String,String> map1=mapTest.getHashMap();
-//		System.out.println("-----"+map1.get("a"));
-		
-		//上锁的HashMap
-//		Map<String,String> sMap=Collections.synchronizedMap(new HashMap());
-		
-//		getMap1();
-		
-		test1();
-		test2();
-	}
-
-	
-	
-	private static void test1() {
-		 Map<String, String> map = new HashMap<String, String>();
-	      map.put("1", "value1");
-	      map.put("2", "value2");
-	      map.put("3", "value3");
-	      //第一种：普遍使用，二次取值
-	      System.out.println("通过Map.keySet遍历key和value：");
-	      for (String key : map.keySet()) {
-	       System.out.println("key= "+ key + " and value= " + map.get(key));
-	      }
-	      
-	      //第二种 使用迭代器Iterator进行遍历
-	      System.out.println("通过Map.entrySet使用iterator遍历key和value：");
-	      Iterator<Map.Entry<String, String>> it = map.entrySet().iterator();
-	      while (it.hasNext()) {
-	       Map.Entry<String, String> entry = it.next();
-	       System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
-	      }
-	      
-	      //第三种：使用entrySet遍历 推荐，尤其是容量大时
-	      System.out.println("通过Map.entrySet遍历key和value");
-	      for (Map.Entry<String, String> entry : map.entrySet()) {
-	       System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
-	      }
-	}
-	
-	private static void test2() {
-		Map<String,Object> hashMap=new HashMap<String,Object>();
-		hashMap.put("a", 1);
-		hashMap.put("c", 3);
-		hashMap.put("b", 2);
-		System.out.println("HashMap:"+hashMap);
-		
-		Map<String,Object> treeMap=new TreeMap<String,Object>();
-		treeMap.put("a", 1);
-		treeMap.put("c", 3);
-		treeMap.put("b", 2);
-		System.out.println("TreeMap:"+treeMap);
-		
-	}
-	
-	
-	
-	
-	
-	private static void getMap1(){
-		Map<Integer,Integer> map1 =new HashMap<Integer,Integer>();
-		Map<Integer,Integer> map2 =new HashMap<Integer,Integer>();
-		map1.put(1, 1);
-		map1.put(2, 2);
-		map1.put(3, 3);
-		map2.put(11, 11);
-		map2.put(22, 22);
-		map2.put(33, 33);
-		Map<Integer,Map<Integer,Integer>> map3 =new HashMap<Integer,Map<Integer,Integer>>();
-		map3.put(1, map1);
-		map3.put(2, map2);
-		
-		System.out.println("map3:"+map3);
-		StringBuffer sb=new StringBuffer();
-		for(Entry<Integer,Map<Integer,Integer>> entry:map3.entrySet()){
-			sb.append(entry.getKey());
-			sb.append(":");
-			Map<Integer,Integer> map4=entry.getValue();
-				for(Entry<Integer,Integer> entry1:map4.entrySet()){
-					sb.append(entry1.getKey());
-					sb.append("_");
-					sb.append(entry1.getValue());
-					sb.append(",");
-				}
-			
-		}
-		sb.deleteCharAt(sb.lastIndexOf(","));
-		System.out.println("sb:"+sb);
-	}
-}
+package com.pancm.basics;
+
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.TreeMap;
+
+/**
+ * 
+* Title: MapTest
+* Description:集合map测试 
+* Version:1.0.0  
+* @author pancm
+* @date 2017年11月16日
+ */
+public class MapTest {
+	private static Map<String,String> map = new HashMap<String,String>();
+	
+	public static Map<String,String> getHashMap(){
+		if(map == null || map.isEmpty()){
+			map = new HashMap<String,String>();
+		}
+		return  map;
+	}
+	
+	public static void main(String[] args) {
+		//普通的HashMap 
+//		Map<String,String> map=mapTest.getHashMap();
+//		map.put("a", "1");
+//		map.put("b", "1");
+//		map.put("c", "e");
+//		System.out.println(map.toString());
+//		Map<String,String> map1=mapTest.getHashMap();
+//		System.out.println("-----"+map1.get("a"));
+		
+		//上锁的HashMap
+//		Map<String,String> sMap=Collections.synchronizedMap(new HashMap());
+		
+//		getMap1();
+		
+		test1();
+		test2();
+	}
+
+	
+	
+	private static void test1() {
+		 Map<String, String> map = new HashMap<String, String>();
+	      map.put("1", "value1");
+	      map.put("2", "value2");
+	      map.put("3", "value3");
+	      //第一种：普遍使用，二次取值
+	      System.out.println("通过Map.keySet遍历key和value：");
+	      for (String key : map.keySet()) {
+	       System.out.println("key= "+ key + " and value= " + map.get(key));
+	      }
+	      
+	      //第二种 使用迭代器Iterator进行遍历
+	      System.out.println("通过Map.entrySet使用iterator遍历key和value：");
+	      Iterator<Map.Entry<String, String>> it = map.entrySet().iterator();
+	      while (it.hasNext()) {
+	       Map.Entry<String, String> entry = it.next();
+	       System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
+	      }
+	      
+	      //第三种：使用entrySet遍历 推荐，尤其是容量大时
+	      System.out.println("通过Map.entrySet遍历key和value");
+	      for (Map.Entry<String, String> entry : map.entrySet()) {
+	       System.out.println("key= " + entry.getKey() + " and value= " + entry.getValue());
+	      }
+	}
+	
+	private static void test2() {
+		Map<String,Object> hashMap=new HashMap<String,Object>();
+		hashMap.put("a", 1);
+		hashMap.put("c", 3);
+		hashMap.put("b", 2);
+		System.out.println("HashMap:"+hashMap);
+		
+		Map<String,Object> treeMap=new TreeMap<String,Object>();
+		treeMap.put("a", 1);
+		treeMap.put("c", 3);
+		treeMap.put("b", 2);
+		System.out.println("TreeMap:"+treeMap);
+		
+	}
+	
+	
+	
+	
+	
+	@SuppressWarnings("unused")
+	private static void getMap1(){
+		Map<Integer,Integer> map1 =new HashMap<Integer,Integer>();
+		Map<Integer,Integer> map2 =new HashMap<Integer,Integer>();
+		map1.put(1, 1);
+		map1.put(2, 2);
+		map1.put(3, 3);
+		map2.put(11, 11);
+		map2.put(22, 22);
+		map2.put(33, 33);
+		Map<Integer,Map<Integer,Integer>> map3 =new HashMap<Integer,Map<Integer,Integer>>();
+		map3.put(1, map1);
+		map3.put(2, map2);
+		
+		System.out.println("map3:"+map3);
+		StringBuffer sb=new StringBuffer();
+		for(Entry<Integer,Map<Integer,Integer>> entry:map3.entrySet()){
+			sb.append(entry.getKey());
+			sb.append(":");
+			Map<Integer,Integer> map4=entry.getValue();
+				for(Entry<Integer,Integer> entry1:map4.entrySet()){
+					sb.append(entry1.getKey());
+					sb.append("_");
+					sb.append(entry1.getValue());
+					sb.append(",");
+				}
+			
+		}
+		sb.deleteCharAt(sb.lastIndexOf(","));
+		System.out.println("sb:"+sb);
+	}
+}
diff --git a/src/main/java/com/pancm/code/MapCodeTest.java b/src/main/java/com/pancm/code/MapCodeTest.java
new file mode 100644
index 0000000..fa41dbc
--- /dev/null
+++ b/src/main/java/com/pancm/code/MapCodeTest.java
@@ -0,0 +1,33 @@
+package com.pancm.code;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+* @Title: MapCodeTest
+* @Description: Map源码学习相关类
+* @Version:1.0.0  
+* @author pancm
+* @date 2018年11月29日
+*/
+public class MapCodeTest {
+
+	/**
+	 * @param args
+	 */
+	public static void main(String[] args) {
+		test1();
+	}
+	
+	
+	/**
+	 * 
+	 */
+	private static void test1() {
+		Map<String, Object> map =new HashMap<>();
+		map.put("1", 1);
+		map.put("2", 2);
+	}
+}
+
+
diff --git a/src/main/java/com/pancm/code/package-info.java b/src/main/java/com/pancm/code/package-info.java
new file mode 100644
index 0000000..07de10e
--- /dev/null
+++ b/src/main/java/com/pancm/code/package-info.java
@@ -0,0 +1,8 @@
+/**
+* @Title: package-info
+* @Description: 源码相关类
+* @Version:1.0.0  
+* @author pancm
+* @date 2018年11月29日
+*/
+package com.pancm.code;
\ No newline at end of file