diff --git a/group05/441517454/work1/.classpath b/group05/441517454/work1/.classpath
new file mode 100644
index 0000000000..fceb4801b5
--- /dev/null
+++ b/group05/441517454/work1/.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/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/group05/441517454/work1/.gitignore b/group05/441517454/work1/.gitignore
new file mode 100644
index 0000000000..ae3c172604
--- /dev/null
+++ b/group05/441517454/work1/.gitignore
@@ -0,0 +1 @@
+/bin/
diff --git a/group05/441517454/work1/.project b/group05/441517454/work1/.project
new file mode 100644
index 0000000000..49a7fabffd
--- /dev/null
+++ b/group05/441517454/work1/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>work1</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/group05/441517454/work1/.settings/org.eclipse.jdt.core.prefs b/group05/441517454/work1/.settings/org.eclipse.jdt.core.prefs
new file mode 100644
index 0000000000..3a21537071
--- /dev/null
+++ b/group05/441517454/work1/.settings/org.eclipse.jdt.core.prefs
@@ -0,0 +1,11 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8
diff --git a/group05/441517454/work1/src/com/coding/basic/ArrayList.java b/group05/441517454/work1/src/com/coding/basic/ArrayList.java
new file mode 100644
index 0000000000..01671f55d8
--- /dev/null
+++ b/group05/441517454/work1/src/com/coding/basic/ArrayList.java
@@ -0,0 +1,106 @@
+package com.coding.basic;
+
+public class ArrayList implements List {
+	
+	private int size = 0;
+	
+	private Object[] elementData = new Object[100];
+	
+	public void add(Object o){
+		
+		if(size<elementData.length)
+		{elementData[size] = o;
+			this.size++;}
+		else{
+			elementData = grow(elementData,1);
+			elementData[size] = o;
+			this.size++;
+		}
+		
+		
+	}
+	
+	public void add(int index, Object o){	
+			if(index<(this.size)&&this.size<elementData.length)
+			{
+				for(int i=this.size;i>index;i--){
+					elementData[i]=elementData[i-1];
+				}
+				elementData[index] = o;
+				this.size++;
+			}
+			else if(index<(this.size)&&this.size==elementData.length)
+				{
+				elementData = grow(elementData,1);
+				elementData[index] = o;
+				this.size++;
+				}
+			else{
+				System.out.println("index/>size����ʧ��");
+				
+			}
+			
+		
+	}
+	
+	public Object get(int index){
+		
+		if(this.size>0&&index<(this.size))
+		return elementData[index];
+		else{
+			return null;
+		}
+	}
+	
+	public Object remove(int index){
+		
+		if(this.size>0&&index<(this.size))
+		{  Object o= elementData[index];
+			for(int i=index;i<this.size;i++){
+				elementData[i]=elementData[i+1];
+			}
+			this.size--;
+			return o;
+			
+			}
+			else{
+				return null;
+			}
+	}
+	
+	public int size(){
+		return this.size;
+	}
+	
+	public Iterator iterator(){
+		return new ArrayListIterator(this);
+	}
+	
+	private static Object[] grow (Object[]src,int size){
+		Object[] target = new Object[src.length+size];
+		System.arraycopy(src, 0, target, 0, src.length);
+		return target;
+	}
+	private class ArrayListIterator implements Iterator{
+	private	ArrayList arrayList;
+		private int pos = 0;
+public ArrayListIterator(ArrayList arrayList) {
+	this.arrayList =arrayList;
+	
+}
+
+		@Override
+		public boolean hasNext() {
+			pos++;
+			if(pos>arrayList.size){				
+				return false;
+			}else
+			return true;
+		}
+
+		@Override
+		public Object next() {
+			
+			return  arrayList.get(pos-1);
+		}}
+}
diff --git a/group05/441517454/work1/src/com/coding/basic/BinaryTreeNode.java b/group05/441517454/work1/src/com/coding/basic/BinaryTreeNode.java
new file mode 100644
index 0000000000..d7ac820192
--- /dev/null
+++ b/group05/441517454/work1/src/com/coding/basic/BinaryTreeNode.java
@@ -0,0 +1,32 @@
+package com.coding.basic;
+
+public class BinaryTreeNode {
+	
+	private Object data;
+	private BinaryTreeNode left;
+	private BinaryTreeNode right;
+	
+	public Object getData() {
+		return data;
+	}
+	public void setData(Object data) {
+		this.data = data;
+	}
+	public BinaryTreeNode getLeft() {
+		return left;
+	}
+	public void setLeft(BinaryTreeNode left) {
+		this.left = left;
+	}
+	public BinaryTreeNode getRight() {
+		return right;
+	}
+	public void setRight(BinaryTreeNode right) {
+		this.right = right;
+	}
+	
+	public BinaryTreeNode insert(Object o){
+		return  null;
+	}
+	
+}
diff --git a/group05/441517454/work1/src/com/coding/basic/Iterator.java b/group05/441517454/work1/src/com/coding/basic/Iterator.java
new file mode 100644
index 0000000000..06ef6311b2
--- /dev/null
+++ b/group05/441517454/work1/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/group05/441517454/work1/src/com/coding/basic/LinkedList.java b/group05/441517454/work1/src/com/coding/basic/LinkedList.java
new file mode 100644
index 0000000000..5eefddce8b
--- /dev/null
+++ b/group05/441517454/work1/src/com/coding/basic/LinkedList.java
@@ -0,0 +1,156 @@
+package com.coding.basic;
+
+
+
+public class LinkedList implements List {
+	
+	private Node head;
+	private Node body;
+	//private Node body1;
+	private int size = 0;
+	
+	
+	public void add(Object o){
+		if(null == head){
+			head = new Node();
+			head.data = o;
+			head.next = null;
+			size++;
+		}
+//		else if(head.next == null){ 
+//			
+//			head.next =new Node();
+//			head.next.data =  o;
+//			head.next.next = null;
+//			body=head.next;
+//			size++;
+//		}
+		else {
+			body=head;
+			while(!(body.next ==null))
+			{body =body.next;}
+			body.next =new Node();
+			body.next.data =o;
+			body.next.next =null;
+			size++;		
+			}
+		
+	
+	}
+	public void add(int index , Object o){
+		
+	}
+	public Object get(int index){
+		 if (index<size)
+			{body=head;
+			for (int i=0;i<index;i++)
+				{
+					body =body.next;
+				}
+				return body.data;
+			}else return null;
+			
+	}
+	public Object remove(int index){
+		 if (index<size&&index>1)
+			{body=head;
+			for (int i=0;i<index-1;i++)
+				{
+					body =body.next;
+				}
+			body.next=body.next.next;
+			size--;	
+				return body.next.data;
+			}else return null;
+		
+	}
+	
+	public int size(){
+		return this.size;
+	}
+	
+	public void addFirst(Object o){
+		if(null == head){
+			head = new Node();
+			head.data = o;
+			head.next = null;
+			size++;
+		}else { 			
+			body =new Node();
+			body.data =  o;
+			body.next = head;
+			head=body;
+			size++;
+			}
+	}
+	public void addLast(Object o){
+		if(!(head==null))			
+			 {
+				body=head;
+				while(!(body.next ==null))
+				{body =body.next;}
+				body.next =new Node();
+				body.next.data =o;
+				body.next.next =body.next;
+				size++;		
+				}else
+					System.out.println("���Ƚ���ͷ���");
+		
+	}
+	public Object removeFirst(){
+		if(!(head==null))			
+		 {
+			body=head;
+			head =head.next;
+			size--;
+			return body.data;
+			}else
+
+		return null;
+	}
+	public Object removeLast(){
+		if (!(head==null))
+		{body=head;
+		for (int i=0;i<size-2;i++)
+			{
+				body =body.next;
+			}
+		body.next=body.next;
+		size--;	
+			return body.next.data;
+		}else return null;
+	
+	}
+	public Iterator iterator(){
+		return new LinkedListIterator(this);
+	}
+	
+	
+	private static  class Node{
+		Object data;
+		Node next;
+		
+	}
+	private class LinkedListIterator implements Iterator{
+		private	LinkedList linkedList;
+			private int pos = 0;
+	public LinkedListIterator(LinkedList linkedList) {
+		this.linkedList =linkedList;
+		
+	}
+
+			@Override
+			public boolean hasNext() {
+				pos++;
+				if(pos>linkedList.size){				
+					return false;
+				}else
+				return true;
+			}
+
+			@Override
+			public Object next() {
+				
+				return  linkedList.get(pos-1);
+			}}
+}
diff --git a/group05/441517454/work1/src/com/coding/basic/List.java b/group05/441517454/work1/src/com/coding/basic/List.java
new file mode 100644
index 0000000000..10d13b5832
--- /dev/null
+++ b/group05/441517454/work1/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/group05/441517454/work1/src/com/coding/basic/Queue.java b/group05/441517454/work1/src/com/coding/basic/Queue.java
new file mode 100644
index 0000000000..cae520dbce
--- /dev/null
+++ b/group05/441517454/work1/src/com/coding/basic/Queue.java
@@ -0,0 +1,30 @@
+package com.coding.basic;
+
+public class Queue {
+	private ArrayList elementData = new ArrayList();
+	public void enQueue(Object o){	
+		elementData.add(o);
+	}
+	
+	public Object deQueue(){
+		
+		if(elementData.size()>0)
+			
+		{ 
+		elementData.remove(0);
+		return elementData.remove(0);
+		}
+		else return null;
+		}
+	
+	public boolean isEmpty(){
+		if(elementData.size()>0)
+			return false;
+			else return true;
+		
+	}
+	
+	public int size(){
+		return elementData.size();
+	}
+}
diff --git a/group05/441517454/work1/src/com/coding/basic/Stack.java b/group05/441517454/work1/src/com/coding/basic/Stack.java
new file mode 100644
index 0000000000..40e8518b24
--- /dev/null
+++ b/group05/441517454/work1/src/com/coding/basic/Stack.java
@@ -0,0 +1,30 @@
+package com.coding.basic;
+
+public class Stack {
+	private ArrayList elementData = new ArrayList();
+	
+	public void push(Object o){	
+		elementData.add(o);
+	}
+	
+	public Object pop(){
+		if(elementData.size()>0)
+			
+			{ int size =elementData.size();
+			elementData.remove(size-1);
+		return elementData.remove(size-1);}
+		else return null;
+	}
+	
+	public Object peek(){
+		return elementData.get(elementData.size()-1);
+	}
+	public boolean isEmpty(){
+		if(elementData.size()>0)
+		return false;
+		else return true;
+	}
+	public int size(){
+		return elementData.size();
+	}
+}
diff --git a/group05/441517454/work1/src/com/coding/basic/Test1.java b/group05/441517454/work1/src/com/coding/basic/Test1.java
new file mode 100644
index 0000000000..b7f644c95d
--- /dev/null
+++ b/group05/441517454/work1/src/com/coding/basic/Test1.java
@@ -0,0 +1,48 @@
+package com.coding.basic;
+
+public class Test1 {
+ public static void main (String[] args){
+//	ArrayList arr = new ArrayList();
+//	arr.add(1);
+//	arr.add(2);
+//	arr.add(3);
+//	arr.add(4);
+//	arr.remove(3);
+//	arr.add(6);
+//	arr.add(7);
+//	System.out.println(arr.size()+"_");
+//	Iterator it =arr.iterator();
+//	while(it.hasNext()){
+//	System.out.println(it.next());
+//	}
+//	 LinkedList link = new LinkedList();
+//	 link.add(0);
+//	 link.add(1);
+//	 link.add(2);
+//	 link.add(3);
+//	 link.add(4);
+//	 link.add(5);
+//	 link.remove(2);
+//	 link.addFirst(100);
+//	 link.addLast(200);
+//	 //link.removeFirst();
+//	 //link.removeLast();
+////	 System.out.println(link.size()+"_");
+////	 System.out.println(link.get(0));
+////	System.out.println(link.get(link.size()-1));
+////	
+//
+//	Iterator it =link.iterator();
+//	while(it.hasNext()){
+//	System.out.println(it.next());
+//	}
+	 Stack st = new Stack();
+	 st.push(0);
+	 st.push(1);
+	 st.push(2);
+	 st.push(4);
+	 st.push(5);
+	 st.pop();
+	 System.out.println(st.peek());
+ }
+}
\ No newline at end of file