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Description: * 容器
* 注意掌握的内容
*
* 如下图：
* set ---HashSet TreeSet ----------装入的对象没顺序并且不能equals字符串比较
* Collection--| 使用链表 使用数组 |--一个一个往里装
* list ---LinkedList,ArrayList ------装入的对象有顺序可以equals比较
*
* Map -------HashMap TreeSet---------------------两个两个往里装
* －－定义了键key value值 映射对 的方法
* Iterator－－－对 collection 进行迭代的迭代器，相当于 指针
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Size: 4218 |
Author: 彷徨 |
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Description: * 容器
* 注意掌握的内容
*
* 如下图：
* set ---HashSet TreeSet ----------装入的对象没顺序并且不能equals字符串比较
* Collection--| 使用链表 使用数组 |--一个一个往里装
* list ---LinkedList,ArrayList ------装入的对象有顺序可以equals比较
*
* Map -------HashMap TreeSet---------------------两个两个往里装
* －－定义了键key value值 映射对 的方法
* Iterator－－－对 collection 进行迭代的迭代器，相当于 指针-* Containers* Note to master the contents of** the following graph:* set-HashSet TreeSet object loaded and no order should not equals string comparison* Collection | the use of an array list | fitted inside one by one* list-LinkedList, ArrayList loaded into the object can have the order equals comparison** Map-HashMap TreeSet- two inside two loaded*- defines the key value key value mapping for the method* Iterator--- iteration of collection iterators, equivalent to pointer
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Size: 4096 |
Author: 彷徨 |
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Description: 哈希表的实现
hashmap.h - declaration of class HashMap
hashmap.cpp - definition of class HashMap
hash-driver.cpp demonstrates use of class HashMap and its member functions.-A Hash Table Implementation
The following header file and implementation file declares and defines a template hash map class. The class takes four template parameters. The first is the key type and the second is the value type. The third parameter specifies the hash function and the fourth parameter specifies how to compare two objects of the key s data type.
• hashmap.h- declaration of class HashMap
• hashmap.cpp- definition of class HashMap
The return type of the search member function of class HashMap is an STL class that we have not yet encountered. Function search returns an object of type pair. Class pair is an STL class that contains two data members. These members are named first and second. This class is used often by functions that need to return more than one piece of data. The search member function needs to return whether or not the item was found and what position it was found in. Thus, function search returns an object of type class pair<bool, int>
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Size: 667648 |
Author: 刘亚 |
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Description: 手动解析HTML是一件很崩溃的事情，sun的swing里也有解析HTML的东东，不过已经是古董了，实在不好拿出来丢Java的人了。-private void extractLinks(URL pageURL, Parser parser) {
Map<String, String> links = new HashMap<String, String>()
try {
NodeFilter filter = new NodeClassFilter(LinkTag.class)
NodeList list = parser.extractAllNodesThatMatch(filter)
for (int i = 0 i < list.size() i++) {
LinkTag n = (LinkTag) list.elementAt(i)
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Size: 4347904 |
Author: 郑海潮 |
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Description: Java中对Map(HashMap,TreeMap,Hashtable等)的排序-Java, on the Map (HashMap, TreeMap, Hashtable, etc.) of the sort
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Size: 1024 |
Author: aa |
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Description: 1.根据一个已有的file c:\student.csv， 将所有学生数据读到一个ArrayList中.ArrayList中的元素类型是Student类型。
2.将得到的这个ArrayList按照小组号分组，构造一个HashMap。 Map的key是组号，value是一个ArrayList，这个arraylist中包含了所有在这个小组下的Student
3. 遍历这个HashMap，打印出每组下学生的学号。 注意，要求打印学号的除前3位其他的字符。比如学号为HSG1001，打印出来就是1001
提示： 1. 可以用string.split(“,”)方法来获得一个数组
2.可以用map.keySet.contains(obj) 方法来判断是否包含了某个元素-1. According to an existing file d: \ student.csv, read all the student data in an ArrayList. ArrayList type of elements in the Student type. 2. Will be in accordance with the group number of this ArrayList groups, construct a HashMap. Map key is the group number, value is an ArrayList, the arraylist contains all in this group under the Student 3. Traverse the HashMap, print out each group of students under the student number. Note that the required number printed school other than the first 3 characters. Such as the school number is HSG1001, print is the 1001 prompt: 1. String.split (" ," ) method can be used to obtain an array 2. Can map.keySet.contains (obj) method to determine whether it contains a certain element
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Size: 8192 |
Author: flinove |
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Description: java 中没有类似javascript中的eval()函数，无法直接将动态变化的字符串转换成java执行语句。此文档中提供两个jar包，和其api，使用非常简单。
Example of use:
Expression exp = new Expression("(x + y)/2")
Map<String, BigDecimal> variables = new HashMap<String, BigDecimal>()
variables.put("x", new BigDecimal("4.32"))
variables.put("y", new BigDecimal("342.1"))
BigDecimal result = exp.eval(variables)
System.out.println(result)
-java does not like the javascript eval () function, can not directly change the dynamic execution of string into a java statement. This document provides two jar files, and its api, very simple to use. Example of use: Expression exp = new Expression (" (x+ y)/2" ) Map <String, BigDecimal> variables = new HashMap <String, BigDecimal> () Variables.put (" x" , new BigDecimal (" 4.32" )) variables.put (" y" , new BigDecimal (" 342.1" )) BigDecimal result = exp.eval (variables) System.out . println (result)
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Size: 110592 |
Author: duishu |
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Description: hash map 使用范例，帮你更好学习hashmap和C++stl-hash map usage examples to help you better learn the hashmap and C++ stl
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Size: 8180736 |
Author: taidongzhe |
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Description: Java hash map 基础 运用，通过和整个儿例子 了解 hashmap的 运用，是一个很实用的例子-Java hash map
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Size: 3072 |
Author: liubangguo |
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Description: 实现两个hashmap 合并为一个或者取出相同的合并为一个hashmap ，主要实现两个map的值相加-Two hashmap into one or remove the same into a hashmap is, mainly to achieve the sum of the values of the two map
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Size: 1024 |
Author: 张贤 |
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Description: 实现两个hashmap 合并为一个，或者取出相同的合并为一个，主要实现两个map值的和的相加-The merger of two hashmap merged into one, or remove the same, the main achievement of the two map values and the sum of
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Size: 1024 |
Author: 张贤 |
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Description: HashMap和TreeMap的实例化
1） 定义一个Emp类，包含（key）id和（value）name成员变量。
2） 通过hashMap和Treemap类创建Map集合，将创建的Emp对象存储在Map集合中
3） 分别遍历由hashmap和Treemap类创建的map集合，总结其特点。
-HashMap and TreeMap instance 1) the definition of a Emp class contains (key) id and (value) name member variables. 2) create Map through hashMap and Treemap class collection, will create the Emp object storage in the Map collection 3), respectively, to traverse the map to create a collection of hashmap and Treemap class, summed up its characteristics.
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Size: 61440 |
Author: DevilD |
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Description: Hashtable和HashMap类有三个重要的不同之处。第一个不同主要是历史原因。Hashtable是基于陈旧的Dictionary类的，HashMap是Java 1.2引进的Map接口的一个实现。-There are three important differences between Hashtable and HashMap class. A different historical reasons. Hashtable stale Dictionary class, HashMap is an implementation of the Java 1.2 introduced the Map interface.
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Size: 11264 |
Author: qaz |
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Description: map 与hashmap的性能测试，
认识如何选择二者之一-Learn how to select either map hashmap performance testing
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Size: 8192 |
Author: 王丽丽 |
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Description: map hashmap 基本操作源码，可运行，简单易于理解-map hashmap basic operation code can be run, simple and easy to understand
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Size: 3072 |
Author: whh |
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Description: 实现类似java的hashmap功能，有insert,remove,put 等map的功能-hash map,like java,include method like insert,remove,put and so on
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Size: 1024 |
Author: 黄永威 |
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Description: HashMap is an implementation of {@link Map}. All optional operations are supported.
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Size: 8192 |
Author: tenpori |
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Description: Hashmap的原生实现，相比大多数的版本，速度是其优势。-A very fast and small(memory efficient) hash map
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Size: 58368 |
Author: Bison |
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Description: public static Map<String, Object> ObjectToMapUtil(Object obj){
Map<String,Object> reMap = new HashMap<String,Object>();
Field[] fields = obj.getClass().getDeclaredFields();
for(int i = 0; i < fields.length; i++){
Field subField = obj.getClass().getDeclaredField(fields[i].getName());
subField.setAccessible(true);
Object o = subField.get(info);
reMap.put(fields[i].getName(), o);
}
return reMap;
}(I hope I can help you.json to map.)
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Size: 1024 |
Author: 少郎 |
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Description: Create Hash map and Hash function
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Size: 9216 |
Author: jin2018 |
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