diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/ArrayList.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/ArrayList.java new file mode 100644 index 0000000000..e287d1779a --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/ArrayList.java @@ -0,0 +1,97 @@ +package com.github.FelixCJF.coding2017.basic; + +import java.util.Arrays; + +public class ArrayList implements List { + + private int size = 0; + + private Object[] elementData = new Object[100]; + + public void add(Object o){ + //容量增加 + ensureCapacity(size + 1); + //添加 + elementData[size++] = o; + } + + public void add(int index, Object o){ + //容量增加 + ensureCapacity(size + 1); + //临时变量 + Object[] elementData3 = new Object[size + 1]; + //将index前数据复制 + for (int i = 0; i < index + 1 ; i++) { + elementData3[i] = elementData[i]; + } + //插入的数据 + elementData3 [index + 1] = o; + //插入数据之后的后半段复制 + for (int i = index + 2 ; i < elementData3.length; i++) { + elementData3[i] = elementData[i-1]; + } + elementData = elementData3; + size++; + } + + public Object get(int index){ + if (index < 0 || index >= this.size) { + throw new IndexOutOfBoundsException(); + } + return elementData[index]; + } + + public Object remove(int index){ + if (index < 0 || index >= this.size) { + throw new IndexOutOfBoundsException(); + } + Object oldValue = elementData[index]; + Object[] elementData4 = new Object[size - 1]; + for (int i = 0; i < index; i++) { + elementData4[i] = elementData[i]; + } + for (int i = index; i < elementData4.length; i++) { + elementData4[i] = elementData[i + 1]; + } + elementData = elementData4; + size--; + return oldValue; + } + + public int size(){ + return size; + } + + public Iterator iterator(){ + return new ArrayListIterator(); + } + + //内部类，实现Iterator + private class ArrayListIterator implements Iterator{ + + private int currentIndex = 0; //当前索引 + + public boolean hasNext() { + if (currentIndex >= size) { + return false; + } + return true; + } + + public Object next() { + Object object = elementData[currentIndex]; + currentIndex ++ ; + return object; + } + } + public void ensureCapacity(int minCapacity) { + int oldCapacity = elementData.length; + if (minCapacity > oldCapacity) { + int newCapacity = (oldCapacity * 3) / 2 + 1; + if (newCapacity < minCapacity) + newCapacity = minCapacity; + elementData = Arrays.copyOf(elementData, newCapacity); + } + } + +} diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/BinaryTreeNode.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/BinaryTreeNode.java new file mode 100644 index 0000000000..6dccc25dcb --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/BinaryTreeNode.java @@ -0,0 +1,32 @@ +package com.github.FelixCJF.coding2017.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; + } + +} \ No newline at end of file diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Iterator.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Iterator.java new file mode 100644 index 0000000000..3a1b9abf8c --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Iterator.java @@ -0,0 +1,8 @@ +package com.github.FelixCJF.coding2017.basic; + +public interface Iterator { + + public boolean hasNext(); + public Object next(); + +} diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/LinkedList.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/LinkedList.java new file mode 100644 index 0000000000..d86e970b8a --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/LinkedList.java @@ -0,0 +1,214 @@ +package com.github.FelixCJF.coding2017.basic; + +import java.util.NoSuchElementException; + +public class LinkedList implements List { + + private Node head;//头指针 + private Node last;//尾指针 + private int size = 0; + + public void add(Object o){ + addLast(o); + } + + public void add(int index , Object o){ + //检查是否越界 + checkIndex(index); + + Node indexNode = node(index); + + if (index == size) { + addLast(o); + } else { + final Node pred = indexNode.prv; + + final Node newNode = new Node(); + newNode.data = o; + newNode.next = indexNode; + newNode.prv = pred; + + indexNode.prv = newNode; + + if (pred == null) { + head = newNode; + } else { + pred.next = newNode; + } + } + size ++; + } + public Object get(int index){ + //检查是否越界 + checkIndex(index); + + Node indexNode = node(index); + + return indexNode.data; + } + public Object remove(int index){ + //检查是否越界 + checkIndex(index); + + Node indexNode = node(index); + Object element = indexNode.data; + Node pre = indexNode.prv; + Node next = indexNode.next; + + if (pre == null) { + head = next; + } else { + pre.next = next; + indexNode.prv = null; + } + + if (next == null) { + last = pre; + } else { + next.prv = pre; + indexNode.next = null; + } + + indexNode.data = null; + + size --; + + return element; + } + + public int size(){ + return size; + } + + public void addFirst(Object o){ + //节点变量存放原来的头指针 + final Node oldHead = head; + //创建新的节点对象 + final Node newNode = new Node(); + newNode.data = o; + newNode.next = head; + newNode.prv = null; + //判断oldhead是否为null + if (oldHead == null) { + last = newNode; + }else { + //头指针指向新创建的节点对象 + oldHead.prv = newNode; + } + //将newNode变为头指针 + head = newNode; + size ++; + } + public void addLast(Object o){ + //节点新变量放原先的尾指针 + final Node oldLast = last; + //创建新节点，加入要添加的对象 + final Node newNode = new Node(); + newNode.data = o; + newNode.next = null; + newNode.prv = oldLast; + if (oldLast == null) { + head = newNode; + } else { + //尾指针指向新创建的节点 + oldLast.next = newNode; + } + //newNode变为尾指针 + last = newNode; + size++; + } + public Object removeFirst(){ + //通过头指针创建头节点 + final Node hNode = head; + if (hNode == null) { + throw new NoSuchElementException(); + } + final Node next = hNode.next; + final Object element = hNode.data; + + //移除 + hNode.data = null; + hNode.next = null; + head = next; + //判断是否为尾节点 + if (next == null) { + last = null; + }else { + next.prv = null; + } + size --; + return element; + } + public Object removeLast(){ + //通过尾指针创建节点 + final Node lastNode = last; + if (lastNode == null) { + throw new NoSuchElementException(); + } + final Object element = lastNode.data; + final Node prve = lastNode.prv; + + //移除 + lastNode.data = null; + lastNode.prv = null; + last = prve; + + if (prve == null) { + head = null; + } else { + prve.next = null; + } + size --; + return element; + } + public Iterator iterator(){ + return new LinkedListIterator(); + } + + private class LinkedListIterator implements Iterator{ + + private Node currentNode = head;//当前节点 + + public boolean hasNext() { + if (currentNode == null) { + return false; + } + return true; + } + + public Object next() { + Object element = currentNode.data; + currentNode = currentNode.next; + return element; + } + + } + + //查找index节点,并返回该节点 + Node node(int index) { + // assert isElementIndex(index); + + if (index < (size >> 1)) { + Node x = head; + for (int i = 0; i < index; i++) + x = x.next; + return x; + } else { + Node x = last; + for (int i = size - 1; i > index; i--) + x = x.prv; + return x; + } + } + //检查索引 + private void checkIndex(int index){ + if (index < 0 || index > size) { + throw new IndexOutOfBoundsException(); + } + } + private static class Node{ + Object data; + Node next; + Node prv; + } +} \ No newline at end of file diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/List.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/List.java new file mode 100644 index 0000000000..ecbb657597 --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/List.java @@ -0,0 +1,11 @@ +package com.github.FelixCJF.coding2017.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(); + public Iterator iterator(); +} \ No newline at end of file diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Queue.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Queue.java new file mode 100644 index 0000000000..c2661ce35f --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Queue.java @@ -0,0 +1,53 @@ +package com.github.FelixCJF.coding2017.basic; + + +public class Queue { + + private Node head;//头节点 + private Node last;//尾节点 + private int size;//记录节点 + + public void enQueue(Object o){ + //设置一个节点变量存放原先的尾节点 + final Node oldLast = last; + //创建一个新的节点 + Node newNode = new Node(); + newNode.data = o; + newNode.next = null; + //添加到队列 + if (isEmpty()) { + head = newNode; + } else { + oldLast.next = newNode; + } + //新节点变为尾节点 + last = newNode; + size ++; + } + + public Object deQueue(){ + + Object object = head.data; + + head = head.next; + + if (isEmpty()) { + last = null; + } + size --; + return object; + } + + public boolean isEmpty(){ + return head == null; + } + + public int size(){ + return size; + } + + private static class Node{ + Object data; + Node next; + } +} \ No newline at end of file diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Stack.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Stack.java new file mode 100644 index 0000000000..cbb7e0683c --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/Stack.java @@ -0,0 +1,36 @@ +package com.github.FelixCJF.coding2017.basic; + +import java.util.EmptyStackException; + +public class Stack { + + //存放栈内元素的容器 + private ArrayList elementData = new ArrayList(); + //记录栈内元素个数 + private int size = 0; + + public void push(Object o){ + elementData.add(o); + size ++; + } + + public Object pop(){ + if (isEmpty()) { + throw new EmptyStackException(); + } + return elementData.remove(size - 1); + } + + public Object peek(){ + if (isEmpty()) { + throw new EmptyStackException(); + } + return elementData.get(size - 1); + } + public boolean isEmpty(){ + return elementData.size() == 0; + } + public int size(){ + return size; + } +} diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/ArrayListTest.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/ArrayListTest.java new file mode 100644 index 0000000000..51f2c1115c --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/ArrayListTest.java @@ -0,0 +1,14 @@ +package com.github.FelixCJF.coding2017.basic.test; + +import org.junit.Before; + +import com.github.FelixCJF.coding2017.basic.ArrayList; + +public class ArrayListTest extends ListTest { + + @Before + public void setUpArrayList() { + aList = new ArrayList(); + } + +} diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/LinkedListTest.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/LinkedListTest.java new file mode 100644 index 0000000000..b990f0327e --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/LinkedListTest.java @@ -0,0 +1,97 @@ +package com.github.FelixCJF.coding2017.basic.test; + + + +import static org.junit.Assert.*; + +import org.junit.Before; +import org.junit.Test; + +import com.github.FelixCJF.coding2017.basic.LinkedList; + +public class LinkedListTest extends ListTest{ + + private LinkedList aLinkedList; + + @Before + public void setUpLinkedList() { + aList = new LinkedList(); + aLinkedList = new LinkedList(); + } + + @Test + public void testAddFirst() { + aLinkedList.addFirst(5); + assertEquals(5, aLinkedList.get(0)); + + aLinkedList.addFirst(6); + assertEquals(6, aLinkedList.get(0)); + assertEquals(5, aLinkedList.get(1)); + assertEquals(2, aLinkedList.size()); + } + + @Test + public void testAddLast() { + aLinkedList.addLast("hello"); + assertEquals("hello", aLinkedList.get(0)); + + aLinkedList.addLast("world"); + assertEquals("hello", aLinkedList.get(0)); + assertEquals("world", aLinkedList.get(1)); + assertEquals(2, aLinkedList.size()); + } + + @Test + public void testRemoveFirst() { + aLinkedList.addLast("hello"); + aLinkedList.addLast("world"); + + aLinkedList.removeFirst(); + assertEquals("world", aLinkedList.get(0)); + assertEquals(1, aLinkedList.size()); + + aLinkedList.removeFirst(); + assertEquals(0, aLinkedList.size()); + } + + @Test + public void testRemoveLast() { + aLinkedList.addFirst("world"); + aLinkedList.addFirst("hello"); + + aLinkedList.removeLast(); + assertEquals("hello", aLinkedList.get(0)); + assertEquals(1, aLinkedList.size()); + + aLinkedList.removeLast(); + assertEquals(0, aLinkedList.size()); + } + + @Test + public void testLinkedListFunctional() { + for (int i=1; i<4; i++) { + aLinkedList.add(i); // [1,2,3] + } + aLinkedList.remove(1); // [1,3] + + aLinkedList.add(1, 0); // [1,0,3] + for (int i=4; i<6; i++) { + aLinkedList.addFirst(i); // [5, 4, 1, 0, 3] + } + assertEquals(5, aLinkedList.size()); + assertEquals(5, aLinkedList.get(0)); + assertEquals(1, aLinkedList.get(2)); + assertEquals(0, aLinkedList.get(3)); + + aLinkedList.remove(3); // [5, 4, 1, 3] + assertEquals(3, aLinkedList.get(aLinkedList.size()-1)); + aLinkedList.removeLast(); // [5, 4, 1] + assertEquals(1, aLinkedList.get(aLinkedList.size()-1)); + aLinkedList.removeFirst(); // [4,1] + + assertEquals(4, aLinkedList.get(0)); + assertEquals(1, aLinkedList.get(1)); + assertEquals(2, aLinkedList.size()); + } + +} diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/ListTest.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/ListTest.java new file mode 100644 index 0000000000..d9c52595d1 --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/ListTest.java @@ -0,0 +1,118 @@ +package com.github.FelixCJF.coding2017.basic.test; + +import static org.junit.Assert.*; + +import org.junit.Rule; +import org.junit.Test; +import org.junit.rules.ExpectedException; + +import com.github.FelixCJF.coding2017.basic.Iterator; +import com.github.FelixCJF.coding2017.basic.List; + +public class ListTest { + + + protected static List aList; + + + @Test + public void testFunctional() { + aList.add(1); + aList.add(2); + assertEquals(1, aList.get(0)); + assertEquals(2, aList.get(1)); + + aList.add(3); + aList.add(0, 5); + aList.add(2, 11); + assertEquals(5, aList.get(0)); + assertEquals(11, aList.get(2)); + + aList.add("hi"); + assertEquals("hi", aList.get(5)); + assertEquals(6, aList.size()); + + aList.remove(1); + assertEquals(11, aList.get(1)); + assertEquals(2, aList.get(2)); + + assertEquals(5, aList.size()); + } + + @Test + public void testAdd() { + for (int i=0; i<100; i++) + aList.add(i); + assertEquals(0, aList.get(0)); + assertEquals(99, aList.get(99)); + assertEquals(44, aList.get(44)); + } + + @Test + public void testRemove() { + aList.add(1); + aList.add(2); + aList.add(3); + int u = (Integer)aList.remove(2); + assertEquals(3, u); + assertEquals(2, aList.size()); + + aList.add(1, 5); + u = (Integer)aList.remove(0); + assertEquals(1, u); + assertEquals(5, aList.get(0)); + assertEquals(2, aList.get(1)); + assertEquals(2, aList.size()); + + aList.remove(0); + aList.remove(0); + assertEquals(0, aList.size()); + + + } + + @Test + public void testSize() { + for (int i=0; i<10; i++) + aList.add(i*2); + assertEquals(10, aList.size()); + } + + @Rule + public ExpectedException expectedEx = ExpectedException.none(); + + @Test + public void testException() { + expectedEx.expect(Exception.class); + + aList.remove(1); + aList.add(3); + aList.add(2, 5); + expectedEx.expect(Exception.class); + } + + @Test + public void testIterator() { + Iterator it = aList.iterator(); + assertEquals(false, it.hasNext()); + + aList.add(1); + aList.add(2); + aList.add(3); + + it = aList.iterator(); + assertEquals(true, it.hasNext()); + assertEquals(1, it.next()); + assertEquals(2, it.next()); + assertEquals(3, it.next()); + assertEquals(false, it.hasNext()); + + aList.remove(1); + it = aList.iterator(); + assertEquals(true, it.hasNext()); + assertEquals(1, it.next()); + assertEquals(3, it.next()); + assertEquals(false, it.hasNext()); + } + +} diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/QueueTest.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/QueueTest.java new file mode 100644 index 0000000000..49506c2b35 --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/QueueTest.java @@ -0,0 +1,34 @@ +package com.github.FelixCJF.coding2017.basic.test; + +import static org.junit.Assert.*; +import org.junit.Before; +import org.junit.Test; + +import com.github.FelixCJF.coding2017.basic.Queue; + +public class QueueTest { + private Queue queue; + + @Before + public void setUpQueue() { + queue = new Queue(); + } + + @Test + public void testQueueFunctional() { + assertEquals(true, queue.isEmpty()); + queue.enQueue(4); + queue.enQueue(2); + assertEquals(2, queue.size()); + assertEquals(false, queue.isEmpty()); + + int i = (Integer)queue.deQueue(); + assertEquals(4, i); + i = (Integer)queue.deQueue(); + assertEquals(2, i); + + assertEquals(0, queue.size()); + assertEquals(true, queue.isEmpty()); + } + +} diff --git a/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/StackTest.java b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/StackTest.java new file mode 100644 index 0000000000..6bb53571a5 --- /dev/null +++ b/group02/1554421063/src/com/github/FelixCJF/coding2017/basic/test/StackTest.java @@ -0,0 +1,41 @@ +package com.github.FelixCJF.coding2017.basic.test; + +import static org.junit.Assert.*; + +import org.junit.Before; +import org.junit.Test; + +import com.github.FelixCJF.coding2017.basic.Stack; + + +public class StackTest { + + private Stack stack; + + @Before + public void setUpStack() { + stack = new Stack(); + } + + @Test + public void testStackFunctional() { + assertEquals(true, stack.isEmpty()); + stack.push(4); + stack.push(2); + assertEquals(2, stack.size()); + assertEquals(false, stack.isEmpty()); + + int i = (Integer)stack.pop(); + assertEquals(2, i); + + i = (Integer)stack.peek(); + assertEquals(4, i); + + i = (Integer)stack.pop(); + assertEquals(4, i); + + assertEquals(0, stack.size()); + assertEquals(true, stack.isEmpty()); + } + +}