diff --git a/group24/330657387/.classpath b/group24/330657387/.classpath
new file mode 100644
index 0000000000..3e0fb272a8
--- /dev/null
+++ b/group24/330657387/.classpath
@@ -0,0 +1,7 @@
+<?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="con" path="org.eclipse.jdt.junit.JUNIT_CONTAINER/4"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>
diff --git a/group24/330657387/.gitignore b/group24/330657387/.gitignore
new file mode 100644
index 0000000000..e2e6235a8a
--- /dev/null
+++ b/group24/330657387/.gitignore
@@ -0,0 +1,5 @@
+/bin/
+
+#ide config
+.settings/
+
diff --git a/group24/330657387/.project b/group24/330657387/.project
new file mode 100644
index 0000000000..fab8d7f04c
--- /dev/null
+++ b/group24/330657387/.project
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>2017Learning</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/group24/330657387/src/com/coding/basic/ArrayList.java b/group24/330657387/src/com/coding/basic/ArrayList.java
new file mode 100644
index 0000000000..1728a28291
--- /dev/null
+++ b/group24/330657387/src/com/coding/basic/ArrayList.java
@@ -0,0 +1,62 @@
+package com.coding.basic;
+
+import java.util.Arrays;
+
+public class ArrayList implements List {
+	
+	private int size = 0;
+	
+	private Object[] elementData = new Object[10];
+	
+    public void ensureCapacity(int input) {
+        if (input > elementData.length) {
+            growCapacity();
+        }
+    }
+    
+    private void growCapacity(){
+    	elementData = Arrays.copyOf(elementData, size * 2);
+    }
+	
+	public void add(Object o){
+		ensureCapacity(size + 1);
+		elementData[size++] = o;
+	}
+	
+	
+	public void add(int index, Object o){
+		rangeCheck(index);
+		ensureCapacity(size + 1);
+		System.arraycopy(elementData,index, elementData, index + 1, size - index);
+		elementData[index] = o;
+		size ++;
+	}
+	
+	private void rangeCheck(int index){
+		if (index > size || index < 0){
+			throw new IndexOutOfBoundsException();
+		}
+	}
+	
+	public Object get(int index){
+		rangeCheck(index);
+		return elementData[index];
+	}
+	
+	public Object remove(int index){
+		rangeCheck(index);
+		Object dest = elementData[index];
+		System.arraycopy(elementData, index +1, elementData, index, size-index-1);
+		size --;
+		return dest;
+	}
+	
+	public int size(){
+		return size;
+	}
+	
+	public Iterator iterator(){
+		return null;
+	}
+	
+}
diff --git a/group24/330657387/src/com/coding/basic/BinaryTreeNode.java b/group24/330657387/src/com/coding/basic/BinaryTreeNode.java
new file mode 100644
index 0000000000..d7ac820192
--- /dev/null
+++ b/group24/330657387/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/group24/330657387/src/com/coding/basic/Iterator.java b/group24/330657387/src/com/coding/basic/Iterator.java
new file mode 100644
index 0000000000..06ef6311b2
--- /dev/null
+++ b/group24/330657387/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/group24/330657387/src/com/coding/basic/LinkedList.java b/group24/330657387/src/com/coding/basic/LinkedList.java
new file mode 100644
index 0000000000..8357e13254
--- /dev/null
+++ b/group24/330657387/src/com/coding/basic/LinkedList.java
@@ -0,0 +1,122 @@
+package com.coding.basic;
+
+import java.util.NoSuchElementException;
+
+public class LinkedList implements List {
+
+	private Node head;
+	private int size = 0;
+
+	public void add(Object o) {
+		if (isEmpty()) {
+			head = new Node(o);
+		} else {
+			Node tail = (Node)get(size-1);
+			Node node = new Node(o);
+			tail.next = node;
+		}
+		size++;
+	}
+
+	public boolean isEmpty() {
+		return (size == 0) ? true : false;
+	}
+
+	public void add(int index, Object o) {
+		rangeCheck(index);
+		if (index ==0) {
+			Node node = new Node(o);
+			node.next = head;
+			head = node;
+		} else {
+			Node pre = (Node)get(index-1);
+			Node node = new Node(o);
+			node.next = pre.next;
+			pre.next = node;
+		}
+	}
+	
+	private void rangeCheck(int index){
+		if (index >= size || index <0){
+			throw new IndexOutOfBoundsException(); 
+		}
+	}
+	
+	public Object get(int index) {
+		rangeCheck(index);
+		Node dest = head;
+		for (int i = 0; i< index; i++){
+			dest = dest.next;
+		}
+		return dest.data;
+	}
+
+	public Object remove(int index) {
+		rangeCheck(index);
+		Node pre = (Node)get(index);
+		Node dest = pre.next;
+		pre.next = dest.next;
+		size --;
+		return dest;
+	}
+
+	public int size() {
+		return size;
+	}
+
+	public void addFirst(Object o) {
+		Node node = new Node(o);
+		node.next = head;
+		head = node;
+		size ++;
+	}
+
+	public void addLast(Object o) {
+		Node last = (Node)get(size-1);
+		Node node = new Node(o);
+		last.next = node;
+		size++;
+	}
+
+	public Object removeFirst() {
+		if (head == null) {
+			throw new NoSuchElementException();
+		}
+		Node newhead = head;
+		head = head.next;
+		size --;
+		return newhead;
+	}
+
+	public Object removeLast() {
+		if (head == null) {
+			throw new NoSuchElementException();
+		}
+		if (head.next == null) {
+			Node tmp = head;
+			head = null;
+			size --;
+			return tmp;
+		}
+		Node newLastNode = (Node)get(size-2);
+		Node oldLastNode = newLastNode.next;
+		newLastNode.next = null;
+		size --;
+		return oldLastNode;
+	}
+
+	public Iterator iterator() {
+		return null;
+	}
+
+	private static class Node {
+		Object data;
+		Node next;
+
+		Node(Object data) {
+			this.data = data;
+			next = null;
+		}
+	}
+
+}
diff --git a/group24/330657387/src/com/coding/basic/List.java b/group24/330657387/src/com/coding/basic/List.java
new file mode 100644
index 0000000000..10d13b5832
--- /dev/null
+++ b/group24/330657387/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/group24/330657387/src/com/coding/basic/Queue.java b/group24/330657387/src/com/coding/basic/Queue.java
new file mode 100644
index 0000000000..36e516e266
--- /dev/null
+++ b/group24/330657387/src/com/coding/basic/Queue.java
@@ -0,0 +1,19 @@
+package com.coding.basic;
+
+public class Queue {
+	
+	public void enQueue(Object o){		
+	}
+	
+	public Object deQueue(){
+		return null;
+	}
+	
+	public boolean isEmpty(){
+		return false;
+	}
+	
+	public int size(){
+		return -1;
+	}
+}
diff --git a/group24/330657387/src/com/coding/basic/Stack.java b/group24/330657387/src/com/coding/basic/Stack.java
new file mode 100644
index 0000000000..a5a04de76d
--- /dev/null
+++ b/group24/330657387/src/com/coding/basic/Stack.java
@@ -0,0 +1,22 @@
+package com.coding.basic;
+
+public class Stack {
+	private ArrayList elementData = new ArrayList();
+	
+	public void push(Object o){		
+	}
+	
+	public Object pop(){
+		return null;
+	}
+	
+	public Object peek(){
+		return null;
+	}
+	public boolean isEmpty(){
+		return false;
+	}
+	public int size(){
+		return -1;
+	}
+}