From 7f7243d0c7a81392f3b24fcbb35446e9f75ea6bf Mon Sep 17 00:00:00 2001 From: XiTang Date: Sun, 26 Feb 2017 21:07:56 +0800 Subject: [PATCH] week01 --- group09/277123057/Week01/ArrayList.java | 55 ++++++ group09/277123057/Week01/BinaryTreeNode.java | 26 +++ group09/277123057/Week01/Iterator.java | 6 + group09/277123057/Week01/LinkedList.java | 173 +++++++++++++++++++ group09/277123057/Week01/List.java | 9 + group09/277123057/Week01/Queue.java | 29 ++++ group09/277123057/Week01/Stack.java | 30 ++++ group09/277123057/Week01/Test.java | 9 + 8 files changed, 337 insertions(+) create mode 100644 group09/277123057/Week01/ArrayList.java create mode 100644 group09/277123057/Week01/BinaryTreeNode.java create mode 100644 group09/277123057/Week01/Iterator.java create mode 100644 group09/277123057/Week01/LinkedList.java create mode 100644 group09/277123057/Week01/List.java create mode 100644 group09/277123057/Week01/Queue.java create mode 100644 group09/277123057/Week01/Stack.java create mode 100644 group09/277123057/Week01/Test.java diff --git a/group09/277123057/Week01/ArrayList.java b/group09/277123057/Week01/ArrayList.java new file mode 100644 index 0000000000..5af3f5e6b0 --- /dev/null +++ b/group09/277123057/Week01/ArrayList.java @@ -0,0 +1,55 @@ +package Week01; +/* + * time:2017-2-20 21:51 created + * + */ +public class ArrayList implements List{ + + private int size = 0; + //���ٵĿռ�ֻ��100�� + private Object[] elementData = new Object[100]; + + //��ĩλ���� + public void add(Object o){ + elementData[size++] = o; + } + + //��ǰλ����Ԫ�أ��������ƶ���ǰλ�ڸ�λ�õ�Ԫ�ؼ����к���Ԫ�� + public void add(int index, Object o){ + System.arraycopy(elementData, index, elementData, index+1, size-index); + elementData[index] = o; + size++; + } + + public Object get(int index){ + return elementData[index]; + } + //�Ƴ���������ָ����Ԫ��,�ұ�Ԫ������ + public Object remove(int index){ + int numMoved = size - index - 1; + if (numMoved > 0) + System.arraycopy(elementData, index+1, elementData, index, numMoved); + elementData[--size] = null; + return elementData[index]; + } + + public int size(){ + return size; + } + + public Iterator iterator(){ + return new ArrayListIterator(); + } + + private class ArrayListIterator implements Iterator{ + private int pos = 0; + + public boolean hashNext() { + return pos < size(); + } + + public Object next() { + return elementData[pos++]; + } + } +} diff --git a/group09/277123057/Week01/BinaryTreeNode.java b/group09/277123057/Week01/BinaryTreeNode.java new file mode 100644 index 0000000000..787b5a1d76 --- /dev/null +++ b/group09/277123057/Week01/BinaryTreeNode.java @@ -0,0 +1,26 @@ +package Week01; +// +/* + *��û���� + * */ +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; + } +} diff --git a/group09/277123057/Week01/Iterator.java b/group09/277123057/Week01/Iterator.java new file mode 100644 index 0000000000..2be5cbc254 --- /dev/null +++ b/group09/277123057/Week01/Iterator.java @@ -0,0 +1,6 @@ +package Week01; +//time +public interface Iterator { + public boolean hashNext(); + public Object next(); +} diff --git a/group09/277123057/Week01/LinkedList.java b/group09/277123057/Week01/LinkedList.java new file mode 100644 index 0000000000..014fe8f149 --- /dev/null +++ b/group09/277123057/Week01/LinkedList.java @@ -0,0 +1,173 @@ +package Week01; + +import java.util.NoSuchElementException; + +/* + * time:2017-2-22 13:00 + * �ο���http://blog.csdn.net/jianyuerensheng/article/details/51204598 + * http://www.jianshu.com/p/681802a00cdf + * jdk1.8Դ�� + * */ + +//������õ���˫��������jdk1.6��linkedList����˫��ѭ������ʵ�� +public class LinkedList implements List { + + private int size = 0; + private Node first; //ָ��ͷ��� + private Node last; //ָ��β�ڵ� + + //��������end����Ԫ�أ������Լ���addLast()���� + public void add(Object o){ + addLast(o); + } + + //����index����,��δ���ο�ͬ��ͬѧ spike + public void add(int index, Object o){ + if (index < 0 || index > size) + throw new IllegalArgumentException(); + size++; + if (index == size){ + addLast(o); + }else{ + Node target = findIndex(index); + Node newNode = new Node(o, target,target.next); + if (last == target){ + last = newNode; + }else{ + //target.next = newNode;����Ҫ��Ҫ�� + target.next.prev = newNode;//�е����� + } + } + size++; + } + + public Object get(int index){ + if ( index < 0 || index > size){ + throw new IllegalArgumentException(); + } + return findIndex(index).data; + } + //ɾ��indexָ����Ԫ�� + public Object remove(int index){ + if (index < 0 || index > size){ + throw new IllegalArgumentException(); + } + + Node target = findIndex(index); + if (target == first){ + first = first.next; + first.prev = null; + }else if(target == last){ + last = last.prev; + last.next = null; + }else{ + target.prev.next = target.next; + target.next.prev = target.prev; + } + return target.data; + } + + public int size(){ + return size; + } + + public void addFirst(Object o){ + + Node f = first; + Node newNode = new Node(o,null,f); + first = newNode; + if (f == null) + last = newNode; //���fΪnull��˵��ֻ��last����ָ�� + else + f.prev = newNode; + size++; + } + + public void addLast(Object o){ + Node l = last; + Node newNode = new Node(o, l, null); + last = newNode; + if (l == null) + first = newNode; + else + l.next = newNode; + size++; + } + + + public Object removeFirst() { + if ( first == null) + throw new NoSuchElementException(); + Node f = first; + Object data = f.data; + Node next = f.next; + //ȥ����Ԫ��ָΪnull + f.data = null; + f.next = null; + first = next; + if (next == null) + last = null; + else + next.prev = null; + size--; + return data; + } + + public Object removeLast(){ + if (last == null) + throw new NoSuchElementException(); + Node l = last; + Object data = l.data; + Node previous = l.prev; + l.data = null; + l.prev = null; + last = previous; + if (previous == null) + first = null; + else + previous.next = null; + size--; + return data; + } + + public Iterator iterator(){ + return new LinkedListIterator(); + } + + private class LinkedListIterator implements Iterator { + Node curNode = first; + public boolean hashNext() { + return curNode != null; + } + public Object next() { + if (!hashNext()) + throw new NoSuchElementException(); + Object data = curNode.data; + curNode = curNode.next; + return data; + } + } + private Node findIndex(int index) { + Node target = first; + int i = 0; + while(i < index){ + target = target.next; + i++; + } + return target; + } + + //������ + private static class Node{ + private Object data; + //Ĭ��Ҳ��null + private Node prev = null; //��һ��Ԫ�ؽڵ� + private Node next = null;//��һ��Ԫ�ؽڵ� + + public Node(Object data, Node pre, Node next){ + this.data = data; + this.prev = pre; + this.next = next; + } + } +} diff --git a/group09/277123057/Week01/List.java b/group09/277123057/Week01/List.java new file mode 100644 index 0000000000..733a02a0d6 --- /dev/null +++ b/group09/277123057/Week01/List.java @@ -0,0 +1,9 @@ +package Week01; +//time: +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/group09/277123057/Week01/Queue.java b/group09/277123057/Week01/Queue.java new file mode 100644 index 0000000000..dd786574b8 --- /dev/null +++ b/group09/277123057/Week01/Queue.java @@ -0,0 +1,29 @@ +package Week01; +/* + * time:2017-2-25 13:46 created by Doen + * + * */ +public class Queue { + private LinkedList elementData = new LinkedList(); + //������ + + public void enQueue(Object o){ + elementData.add(o); + } + + //������ + public Object deQueue(){ + if (isEmpty()) + throw new UnsupportedOperationException(); + return elementData.remove(0); + } + + public boolean isEmpty(){ + return elementData.size() == 0; + } + + public int size(){ + return elementData.size(); + } + +} diff --git a/group09/277123057/Week01/Stack.java b/group09/277123057/Week01/Stack.java new file mode 100644 index 0000000000..9a10468385 --- /dev/null +++ b/group09/277123057/Week01/Stack.java @@ -0,0 +1,30 @@ +package Week01; + +import java.util.NoSuchElementException; + +/* + * time:2017-2-25 13:19 created by Doen + * change + * */ +public class Stack { + + private ArrayList elementData = new ArrayList(); + + public void push(Object o){ + elementData.add(o); + } + + public Object pop(){ + if (isEmpty()) + throw new NoSuchElementException(); + return elementData.remove(elementData.size()-1); + } + + public boolean isEmpty(){ + return elementData.size() == 0; + } + + public int size(){ + return elementData.size(); + } +} diff --git a/group09/277123057/Week01/Test.java b/group09/277123057/Week01/Test.java new file mode 100644 index 0000000000..5d4517d9af --- /dev/null +++ b/group09/277123057/Week01/Test.java @@ -0,0 +1,9 @@ +package Week01; +//time +public class Test { + public static void main(String[] args){ + ArrayList arraylist = new ArrayList(); + arraylist.add(1); + arraylist.add("A"); + } +}