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Merge pull request #7 from maishihang/master
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package com.coding.basic; | ||
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import java.util.Arrays; | ||
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/** | ||
* | ||
* arrayList集合-数组 | ||
* | ||
* @ClassName ArrayList | ||
* @author msh | ||
* @date 2017年2月21日 下午3:49:24 | ||
*/ | ||
public class ArrayList implements List { | ||
// 记录ArrayList集合大小 | ||
private int size = 0; | ||
// 初始化存储数组 | ||
private Object[] elementData = new Object[100]; | ||
/** | ||
* | ||
* 向最后插入元素 | ||
* | ||
* @Method add 添加 | ||
* @param o 元素 | ||
* @see com.coding.basic.List#add(java.lang.Object) | ||
*/ | ||
public void add(Object o){ | ||
// 数组不够时增长 | ||
growOrNot(size + 1); | ||
elementData[size] = o; | ||
++size; | ||
} | ||
/** | ||
* | ||
* 向指定位置插入元素 | ||
* | ||
* @Method add 添加 | ||
* @param index 下标 | ||
* @param o 元素 | ||
* @see com.coding.basic.List#add(int, java.lang.Object) | ||
*/ | ||
public void add(int index, Object o){ | ||
validate(index); | ||
growOrNot(size + 1); | ||
System.arraycopy(elementData, index, elementData, index + 1, size - index); | ||
elementData[index] = o; | ||
++size; | ||
} | ||
/** | ||
* | ||
* 取得元素 | ||
* | ||
* @Method get 取得 | ||
* @param index 下标 | ||
* @return | ||
* @see com.coding.basic.List#get(int) | ||
*/ | ||
public Object get(int index){ | ||
validate(index); | ||
return elementData[index]; | ||
} | ||
/** | ||
* | ||
* 删除元素 | ||
* | ||
* @Method remove 删除 | ||
* @param index 下标 | ||
* @return 删除的元素 | ||
* @see com.coding.basic.List#remove(int) | ||
*/ | ||
public Object remove(int index){ | ||
Object oldValue = elementData[index]; | ||
validate(index); | ||
System.arraycopy(elementData, index + 1, elementData, index, size - index - 1); | ||
elementData[size] = null; | ||
--size; | ||
return oldValue; | ||
} | ||
/** | ||
* | ||
* 取得集合大小 | ||
* | ||
* @Method size 集合大小 | ||
* @return 集合大小 | ||
* @see com.coding.basic.List#size() | ||
*/ | ||
public int size(){ | ||
return size; | ||
} | ||
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public Iterator iterator(){ | ||
return null; | ||
} | ||
/** | ||
* | ||
* 判断是否需要增长数组 | ||
* | ||
* @MethodName growOrNot | ||
* @author msh | ||
* @date 2017年2月21日 下午3:53:29 | ||
* @param minCapacity | ||
*/ | ||
private void growOrNot(int minCapacity) { | ||
// 当增加长度大于数组长度时,增长 | ||
if (minCapacity > elementData.length) { | ||
elementData = Arrays.copyOf(elementData, elementData.length * 2); | ||
} | ||
} | ||
/** | ||
* | ||
* 验证 | ||
* | ||
* @MethodName validate 下标 | ||
* @author msh | ||
* @date 2017年2月21日 下午3:54:21 | ||
* @param index | ||
*/ | ||
private void validate(int index) { | ||
if (index < 0 || index >= size) | ||
throw new IndexOutOfBoundsException("Index: " + index + ", Size: " + size); | ||
} | ||
} |
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group12/446031103/src/com/coding/basic/BinaryTreeNode.java
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package com.coding.basic; | ||
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public class BinaryTreeNode { | ||
private Object data; | ||
private BinaryTreeNode left; | ||
private BinaryTreeNode right; | ||
private BinaryTreeNode( Object data,BinaryTreeNode left,BinaryTreeNode right){ | ||
this.data = data; | ||
this.left = left; | ||
this.right = 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; | ||
} | ||
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public BinaryTreeNode insert(BinaryTreeNode tree,Object o){ | ||
if(null== tree){ | ||
tree = new BinaryTreeNode(o, null, null); | ||
} | ||
if(Integer.valueOf(o.toString())>Integer.valueOf(tree.data.toString())){ | ||
tree.right =insert(tree.right,o); | ||
}else{ | ||
tree.left = insert(tree.left,o); | ||
} | ||
return tree; | ||
} | ||
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} |
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package com.coding.basic; | ||
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public interface Iterator { | ||
public boolean hasNext(); | ||
public Object next(); | ||
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} |
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