diff --git a/group11/996108220/.classpath b/group11/996108220/.classpath
new file mode 100644
index 0000000000..d171cd4c12
--- /dev/null
+++ b/group11/996108220/.classpath
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/group11/996108220/.gitignore b/group11/996108220/.gitignore
new file mode 100644
index 0000000000..5e56e040ec
--- /dev/null
+++ b/group11/996108220/.gitignore
@@ -0,0 +1 @@
+/bin
diff --git a/group11/996108220/.project b/group11/996108220/.project
new file mode 100644
index 0000000000..fe4e769dd4
--- /dev/null
+++ b/group11/996108220/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>996108220Learning</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>
diff --git a/group11/996108220/src/com/coding/basic/ArrayList.java b/group11/996108220/src/com/coding/basic/ArrayList.java
new file mode 100644
index 0000000000..6fe727645b
--- /dev/null
+++ b/group11/996108220/src/com/coding/basic/ArrayList.java
@@ -0,0 +1,124 @@
+package com.coding.basic;
+
+public class ArrayList implements List {
+	
+	private int size = 0;
+	private Object[] elementData = new Object[100];
+	/**
+	 * 在队尾添加元素
+	 */
+	public void add(Object o){
+		if(size+1>elementData.length)this.grow(elementData);
+		else elementData[size++]=o;
+	}
+	/**
+	 * 在index处添加元素，index+1到size-1元素向后移动
+	 */
+	public void add(int index, Object o){
+		if(index<0||index>size){
+			System.out.println("数组越界"+index);
+			return;
+		}
+		if(size+1>elementData.length)this.grow(elementData);
+		else {
+			for(int i=size;i>=index+1;)
+			{
+				elementData[i]=elementData[--i];
+			}
+			size++;
+			elementData[index]=o;
+		}
+		
+	}
+	/**
+	 * 获得index处的元素elementData[index]
+	 */
+	public Object get(int index){
+		//TODO越界抛出异常
+		if(index<0||index>size){
+			System.out.println("数组越界"+index);
+			return null;
+		}
+		else{
+			return elementData[index];
+		}
+	}
+	/**
+	 * 移除index处的元素，将index+1到size-1的元素向前移动
+	 */
+	public Object remove(int index){
+		//TODO越界抛出异常
+		if(index<0||index>=size){
+			System.out.println("数组越界"+index);
+			return null;
+			}
+		else{
+			Object value=elementData[index];
+			for(int i=index;i<size;)
+			{
+				elementData[i]=elementData[++i];
+			}
+			size--;
+			return value;
+		}
+	}
+	
+	public int size(){
+		return size;
+	}
+	
+	public Iterator iterator(){
+		return new Itr();
+	}
+
+	 private class Itr implements Iterator {
+	        int cursor;       // index of next element to return
+	        Itr() {
+	            cursor=0;
+	        }
+	        public boolean hasNext() {
+	            return cursor != size;
+	        }
+
+	        
+	        public Object next() {
+	            
+	            int i = cursor;
+	            if (i >= size)
+	                System.out.println("超过size");;
+	            Object[] elementData = ArrayList.this.elementData;
+	            if (i >= elementData.length)
+	                System.out.println("超过length");
+	            cursor = i + 1;
+	            return  elementData[i];
+	        }
+
+	 }
+	public void grow(Object[] elementData2){
+		int[] elementData=new int[elementData2.length+elementData2.length/2];
+		System.arraycopy(elementData2,0,elementData,0,elementData2.length); 
+	}
+	/**
+	 * 测试方法
+	 * @param args
+	 */
+	public static void main(String args[]){
+		ArrayList list=new ArrayList();
+		list.add(1);
+		list.add(2);
+		list.add(3);
+		list.add(4);
+		list.add(5);
+		list.add(6);
+		//list.add(2,0);
+		//list.remove(list.size-1);
+		System.out.println(list.size());
+		Iterator itr=list.iterator();
+		while (itr.hasNext()) {
+			System.out.println(itr.next());
+			
+		}
+	}
+	
+}
+
diff --git a/group11/996108220/src/com/coding/basic/BinaryTree.java b/group11/996108220/src/com/coding/basic/BinaryTree.java
new file mode 100644
index 0000000000..1b6d95b6d1
--- /dev/null
+++ b/group11/996108220/src/com/coding/basic/BinaryTree.java
@@ -0,0 +1,129 @@
+package com.coding.basic;
+
+import com.sun.corba.se.impl.orbutil.graph.Node;
+
+public class BinaryTree <T extends Comparable>{
+	
+	private BinaryTreeNode root=null;
+	private int size=0;
+	/**
+	 * 插入节点，保持二叉树的性质
+	 * @param o
+	 */
+	public void insert(T o){
+		if (size==0) {
+			root=new BinaryTreeNode<Comparable>(o);
+			}
+		else{
+			insert(o,root);	
+			}
+		size++;
+		}
+	
+	private void insert(T o,  BinaryTreeNode<?> ptr) {
+		if ((ptr.right==null&&(ptr.data.compareTo(o)<=0))){
+			ptr.right=new BinaryTreeNode<Comparable>(o);	
+		}
+		else if (ptr.left==null&&(ptr.data.compareTo(o)>0)) {
+			ptr.left=new BinaryTreeNode<Comparable>(o);
+
+		} 
+		else if (ptr.left!=null&&(ptr.data.compareTo(o)>0)) {
+			insert(o, ptr.left);
+		}
+		else {
+			insert(o, ptr.right);
+		}		
+	}
+	private static  class BinaryTreeNode <T extends Comparable>{
+		private T data;
+		private BinaryTreeNode left;
+		private BinaryTreeNode right;	
+		private BinaryTreeNode(T o) {
+			this.data=o;
+			this.left=null;
+			this.right=null;
+		}
+		private BinaryTreeNode() {
+			
+		}
+	}
+	  /**
+     * 前序遍历
+     */
+    public void preOrder(BinaryTreeNode Node)
+    {
+        if (Node != null)
+        {
+            System.out.print(Node.data + " ");
+            preOrder(Node.left);
+            preOrder(Node.right);
+        }
+    }
+
+    /**
+     * 中序遍历
+     */
+    public void midOrder(BinaryTreeNode Node)
+    {
+        if (Node != null)
+        {
+            midOrder(Node.left);
+            System.out.print(Node.data + " ");
+            midOrder(Node.right);
+        }
+    }
+
+    /**
+     * 后序遍历
+     */
+    public void posOrder(BinaryTreeNode Node)
+    {
+        if (Node != null)
+        {
+            posOrder(Node.left);
+            posOrder(Node.right);
+            System.out.print(Node.data + " ");
+        }
+    }
+    /**
+     * @param key查找元素
+     * @param node
+     * @return 返回date的node引用
+     */
+    public BinaryTreeNode searchNode(T key,BinaryTreeNode node) {
+    	if (node!=null) {
+    		if (node.data.compareTo(key)==0) {
+				return node;
+			}
+    		else if (node.data.compareTo(key)>0) {
+    			return searchNode(key,node.left);
+			}
+    		else {
+    			return searchNode(key,node.right);
+			}	
+		}
+    	else{
+    		return null;
+    	}					
+	}
+
+	public static void main(String[] args) {
+		BinaryTree tree=new BinaryTree();
+		tree.insert(5);
+		tree.insert(3);
+		tree.insert(1);
+		tree.insert(6);
+		tree.insert(5);
+		tree.insert(2);
+		tree.preOrder(tree.root);
+		System.out.println();
+		tree.posOrder(tree.root);
+		System.out.println();
+		tree.midOrder(tree.root);
+		System.out.println(tree.searchNode(1, tree.root).data);
+		
+		
+	}
+	
+}
diff --git a/group11/996108220/src/com/coding/basic/Iterator.java b/group11/996108220/src/com/coding/basic/Iterator.java
new file mode 100644
index 0000000000..dbe8b9afb2
--- /dev/null
+++ b/group11/996108220/src/com/coding/basic/Iterator.java
@@ -0,0 +1,7 @@
+package com.coding.basic;
+
+public interface Iterator {
+	public boolean hasNext();
+	public Object next();
+
+}
diff --git a/group11/996108220/src/com/coding/basic/LinkedList.java b/group11/996108220/src/com/coding/basic/LinkedList.java
new file mode 100644
index 0000000000..be0b354bc2
--- /dev/null
+++ b/group11/996108220/src/com/coding/basic/LinkedList.java
@@ -0,0 +1,176 @@
+package com.coding.basic;
+import java.util.NoSuchElementException;
+
+public class LinkedList implements List {
+	
+	private Node head;
+	private int size=0;
+/**
+ * 增加节点	
+ */
+	public void add(Object o){
+		if(size==0){
+			head=new Node();
+			head.data=o;
+			head.next=null;
+			size++;
+			}
+		else{
+			addLast(o);
+			}
+			
+	}
+/**
+ * 在index(0~size)处添加元素
+ */
+	public void add(int index , Object o){
+		
+		if(index<0||index>size){
+			System.out.println("index超出范围"+index);
+			return;
+			}
+		if(index==0)addFirst( o);
+		else if(index==size)addLast(o);
+		else{
+			Node ptr=head;
+			for(int i=1;i<index;i++){
+				ptr=ptr.next;
+			}
+			Node node=new Node();
+			node.data=o;
+			node.next=ptr.next;
+			ptr.next=node;		
+		}
+		size++;
+	}
+/**
+ * 获得index(0~size-1)的元素
+ */
+	public Object get(int index){
+		if(index<0||index>=size)return null;
+		else{
+			Node ptr=head;
+			for(int i=0;i<index;i++){
+				ptr=head.next;
+			}
+			return ptr;
+		}
+	}
+/**
+ * 移除index(0~size-1)的元素
+ */
+	public Object remove(int index){
+		if(index<0||index>=size)return null;
+		else if(index==0)return removeFirst();
+		else if(index==size-1)return removeLast();
+		else{
+			Node ptr=head;
+			for(int i=1;i<index;i++){
+				ptr=ptr.next;
+				}
+			Node node=ptr.next;
+			ptr.next=node.next;
+			size--;	
+			return node.data;
+			}	
+	}
+	
+	public int size(){
+		return size;
+	}
+	
+	public void addFirst(Object o){
+		Node ptr=head;
+		head=new Node();
+		head.data=o;
+		head.next=ptr;	
+		size++;
+	}
+	public void addLast(Object o){
+		Node ptr=head;
+		for(int i=1;i<size;i++){
+			ptr=ptr.next;
+		}
+		Node node=new Node();
+		node.data=o;
+		node.next=null;	
+		ptr.next=node;
+		size++;
+		
+	}
+	public Object removeFirst(){
+		Node ptr=head.next;
+		head.next=null;
+		Object o=head.data;
+		head=ptr;
+		size--;
+		return o;
+	}
+	public Object removeLast(){
+		Node ptr=head;
+		for(int i=1;i<size-1;i++){
+			ptr=ptr.next;
+		}
+		Node node=ptr.next;
+		ptr.next=null;
+		size--;
+		return node.data;
+	}
+	public Iterator iterator(){
+		return new ListItr();
+	}
+    private class ListItr implements Iterator {
+    
+        private Node next=null;
+        private int nextIndex;
+
+        ListItr() {
+            next = head;
+            nextIndex = 0;
+        }
+
+        public boolean hasNext() {
+            return nextIndex < size;
+        }
+
+        public Object next() {
+            if (!hasNext())
+                throw new NoSuchElementException();
+
+            Node lastReturned = next;
+            next = next.next;
+            nextIndex++;
+            return lastReturned.data;
+        }
+    }
+	
+	private static  class Node{
+		Object data;
+		Node next;	
+	}
+	public static void main(String args[]){
+	LinkedList list=new LinkedList();
+	list.add(0);
+	list.add(1);
+	list.add(2);
+	list.add(3);
+	list.add(4);
+	list.add(5);
+	list.add(6);
+//	list.add(7,9);
+//	System.out.println(list.remove(5));
+//	System.out.println(list.remove(5));
+//	System.out.println(list.remove(6));
+//	System.out.println(list.size());
+//	Node ptr=list.head;
+//	do{
+//		System.out.print(ptr.data);
+//		ptr=ptr.next;
+//		}while(ptr!=null);
+	Iterator itr=list.iterator();
+	while (itr.hasNext()) {
+		System.out.println(itr.next());
+		
+	}
+	}
+}
diff --git a/group11/996108220/src/com/coding/basic/List.java b/group11/996108220/src/com/coding/basic/List.java
new file mode 100644
index 0000000000..396b1f6416
--- /dev/null
+++ b/group11/996108220/src/com/coding/basic/List.java
@@ -0,0 +1,9 @@
+package com.coding.basic;
+
+public interface List {
+	public void add(Object o);
+	public void add(int index, Object o);
+	public Object get(int index);
+	public Object remove(int index);
+	public int size();
+}
diff --git a/group11/996108220/src/com/coding/basic/Queue.java b/group11/996108220/src/com/coding/basic/Queue.java
new file mode 100644
index 0000000000..8406ec4451
--- /dev/null
+++ b/group11/996108220/src/com/coding/basic/Queue.java
@@ -0,0 +1,20 @@
+package com.coding.basic;
+
+public class Queue {
+	//用链表实现队列
+	private LinkedList elementData = new LinkedList();
+	public void enQueue(Object o){
+		elementData.addLast(o);;
+	}
+	public Object deQueue(){
+		return elementData.removeFirst();
+	}
+	
+	public boolean isEmpty(){
+		return elementData.size()==0?true:false;
+	}
+	
+	public int size(){
+		return elementData.size();
+	}
+}
diff --git a/group11/996108220/src/com/coding/basic/Stack.java b/group11/996108220/src/com/coding/basic/Stack.java
new file mode 100644
index 0000000000..ea41c87d1b
--- /dev/null
+++ b/group11/996108220/src/com/coding/basic/Stack.java
@@ -0,0 +1,24 @@
+package com.coding.basic;
+
+public class Stack {
+	//用动态数组实现栈
+	private ArrayList elementData = new ArrayList();
+	
+	public void push(Object o){	
+		elementData.add(elementData.size());
+	}
+	
+	public Object pop(){
+		return elementData.remove(elementData.size()-1);
+	}
+	
+	public Object peek(){
+		return elementData.get(elementData.size()-1);
+	}
+	public boolean isEmpty(){
+		return elementData.size()==0?true:false;
+	}
+	public int size(){
+		return elementData.size();
+	}
+}