我的Java路

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我的Java路

篇1:我的Java路

我的Java路

不是我不明白,是这世界变化快,编程语言换了一代又一代,到底我该学哪代? 经常听到将要和正在学习计算机的朋友发出这样的疑问,我有些切身经历,希望能够对朋友们有所借鉴.

作 者:尤卫明  作者单位: 刊 名:软件工程师 英文刊名:SOFTWARE ENGINEER 年,卷(期): “”(3) 分类号: 关键词: 

篇2:Java英文简历

yjbys

Male, 23, The cantonese

Education: bachelor degree

Working lives: fresh graduates

Expected salary: negotiable

Working location: guangzhou huangpu - unlimited

Objective: the Java software development engineer | other software/Internet development

Education experience

Guangdong institute of science and technology of software engineering in school today

Project/training experience

In November - December 2016 restaurant order system based on SSH framework

training contents of project: the project for my university undergraduate course graduation design, developed by himself alone. The system database using the MySQL database, using Spring, Hibernate, the Struts framework integration development. The front desk mainly use JSP technology, js, HTML, CSS, Jquery Ajax libraries. System function development is relatively perfect.

Certificate of award

Issued by time: certificate of title: college English level 6 February

Certificate name: high-tech certificate issued by time: in February 2016

Self description

I am a guangdong institute of science and technology university graduate, want to be able to find a of the's fourth yearat hogwarts with J2EE development related internship, learning experience, and standardize enterprise development lays the foundation for later work.

Professional skills: Java language, Struts, Spring, Hibernate three classical framework, Mysql, Oracle and other databases, the mainstream of HTML, CSS, JS, have certain ability to use (because of mainly for the background, use of AJAX in the JQuery library skilled).

Career aspirations: hope to find a job as a J2EE development, learning about enterprise development mode, standardize their own programming habits, learn more mainstream development technology at the same time, the accumulation of development experience.

Foreign language level: college English level 6.

篇3:Java英文简历

yjbys

Male, 27 years old

Education: bachelor degree

Working years: 1 to 2 years

Expected salary: negotiable

Working location: guangzhou - there is no limit

Objective: software engineer | | ERP technology/development application electronics/electrical engineers

Strong interpersonal communication skills Ability to perform Strong learning ability Have affinity The good faith integrity Sunshine is bright Be good at innovation

Work experience (work for 6 months, 1 year do 1 job)

Guangzhou zhengxing software co., LTD

Working time: in February 2015 to August 2016 [] 1 year 6 months

Job title: Java programmers

Work content: according to the demand of the project to carry on the design code, and project document writing.

Education experience

Graduated in July Electronic information engineering of xi 'an university of posts and telecommunications

Professional skills

Java: proficient in experience: 3 years

Language skills.

English: good

Certificate of award

Name: certificate issued by the university English four levels of time: in June , issuing authority: department of education

Self description

Self assessment As a Java programmer, software development in zhengxing software company for more than a year, the computer software industry development and research, software development has a profound accumulation of multiple


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篇4:java总结

一、数组、集合

数组、集合:都是一种容器,用一个对象管理多个对象;

数组:不能自动增长;只能存放同类型的元素

集合:能自动扩容;部分集合允许存放不同类型的元素;

二、学习这些集合类要掌握哪些东西:

1)怎样得到(选择)集合对象;

2)怎样添加元素

3)怎样删除元素

4)怎样循环遍历没一个元素

三、list、set、map

collection:父接口;

Set:接口---一个实现类:HashSet

List:接口---三个实现类:LinkedList,Vector,ArrayList

SortedSet:接口---实现类:TreeSet

1、List:

List:有序列表,允许存放重复的元素;

实现类:

ArrayList:数组实现,查询快,增删慢,线程不安全,轻量级;下标也是从0开始;

LinkedList:链表实现,增删快,查询慢

Vector:数组实现,线程安全,重量级

2.Set:

无序集合,不允许存放重复的元素;

实现类HashSet:equals返回true,hashCode返回相同的整数;哈希表;

子接口SortedSet:对Set排序实现类:TreeSet:二叉树实现的;

看API:泛型:表示一个对象;

Iterator:接口,迭代器;

java.util;

hasNext;

next();

remove();

Iterable:可迭代的,访问的;

ng;实现了可迭代的接口就可以用迭代的方式访问;

只需实现iterator();方法即可;Iteratoriterator();

三种循环的访问方式:

只有实现了Iterable接口的才能用第三种;能用第二种的也一定能用第三种;

ArrayList:自动扩容,是数组照搬过来的;

3.Map

HashMap:键值对,key不能重复,但是value可以重复;key的实现就是HashSet;value对应着放;

HashSet的后台有一个HashMap;初始化后台容量;只不过生成一个HashSet的话,系统只提供key的访问;

如果有两个Key重复,那么会覆盖之前的;

Hashtable:线程安全的

Properties:java.util.Properties;key和value都是String类型,用来读配置文件;

HashMap与Hashtable区别:

HashMap线程不安全的,允许null作为key或value;

Hashtable线程安全的,不允许null作为key或value;

TreeMap:对key排好序的Map;key就是TreeSet,value对应每个key;

key要实现Comparable接口或TreeMap有自己的构造器;

HashSet:remove(Objecto)的原则看这个对象O的Hashcode和equals是否相等,并不是看是不是一个对象;

定义一个Map;key是课程名称,value是Integer表示选课人数;

map.put(cou,map.get(cou)+newInteger(1));

四、Hashtable、Properties

1,Hashtable:实现了Map接口,此类实现一个哈希表,作用和HashMap相同。任何非null对象都可以用作键或值。为了成功地在哈希表中存储和获取对象,用作键的.对象必须实现hashCode方法和equals法。

2,Properties:继承自Hashtable,比Hashtable更严格属性列表中每个键及其对应值都是一个字符串。

常用方法StringgetProperty(String?key)和setProperty(Stringkey,Stringvalue);

用法:我在C盘下建了一个名为yy.dat的文件,文件的内容为:

name=hehe

password=12345

执行以下程序,输出hehe,可见用Properties可以很方便的解析配置文件

Propertiesp=newProperties();

p.load(newFileInputStream(“C:yy.dat”));

System.out.println(p.getProperty(“name”))

五、两个工具类Arrays和Collections

1.Arrays、此类包含用来操作数组(比如排序和搜索)的各种方法。此类还包含一个允许将数组作为列表来查看的静态工厂

2.Collections、主要提供了在collection上进行操作的静态方法

六、遗留的几个类

1.Hashtable,作用和HashMap相同,不过它是线程安全的,如果不需要线程安全,应该使用HashMap

2.Enumeration,遗留集合使用枚举接口来遍历元素,它有两个方法,hasMoreElements和nextElement,用法类似Iterator。

3.Stack,继承自Vector,实现了栈的功能,提供了push()方法押栈和pop()方法出栈。

4.BitSet,位集。如果需要高效率的存储一个位序列,例如一个标志序列,请使用位集。它可以对各个位进行

读取get(i)

设置set(i)

清楚clear(i)

七、常见笔试题目汇总

1.Collection和Collections的区别。

Collection是集合类的上级接口,继承与他的接口主要有Set和List.

Collections是针对集合类的一个帮助类,他提供一系列静态方法实现对各种集合的搜索、排序、线程安全化等操作。

2.List,Set,Map是否继承自Collection接口?

List,Set是,Map不是

3.两个对象值相同(x.equals(y)==true),但却可有不同的hashcode,这句话对不对?

不对,有相同的hashcode。

4.你所知道的集合类都有哪些?主要方法?

最常用的集合类是List和Map。List的具体实现包括ArrayList和Vector,它们是可变大小的列表,比较适合构建、存储和操作任何类型对象的元素列表。List适用于按数值索引访问元素的情形。

Map提供了一个更通用的元素存储方法。Map集合类用于存储元素对(称作“键”和“值”),其中每个键映射到一个值。

5.排序都有哪几种方法?请列举。用JAVA实现一个快速排序。

排序的方法有:插入排序(直接插入排序、希尔排序),交换排序(冒泡排序、快速排序),选择排序(直接选择排序、堆排序),归并排序,分配排序(箱排序、基数排序)

快速排序的伪代码。

//使用快速排序方法对a[0:n-1]排序

从a[0:n-1]中选择一个元素作为middle,该元素为支点

把余下的元素分割为两段left和right,使得left中的元素都小于等于支点,而right中的元素都大于等于支点

递归地使用快速排序方法对left进行排序

递归地使用快速排序方法对right进行排序

所得结果为left+middle+right

6.HashMap和Hashtable的区别

都属于Map接口的类,实现了将惟一键映射到特定的值上。

HashMap类没有分类或者排序。它允许一个null键和多个null值。

Hashtable类似于HashMap,但是不允许null键和null值。它也比HashMap慢,因为它是同步的。

7.Set里的元素是不能重复的,那么用什么方法来区分重复与否呢?是用==还是equals()它们有何区别?

Set里的元素是不能重复的,那么用iterator()方法来区分重复与否。

equals()是判读两个Set是否相等。

equals()和==方法决定引用值是否指向同一对象equals()在类中被覆盖,为的是当两个分离的对象的内容和类型相配的话,返回真值。

篇5:java英文简历

yjbys

Male 22 years old The cantonese

Education: bachelor degree

Working lives: fresh graduates

Expected salary: 3000-5000 yuan

Working location: guangzhou - there is no limit

Objective: a software engineer

The good faith integrity a strong sense of responsibility Highly effective

Education experience

Graduated in December 2016 The Internet of things engineering guangdong ocean university

Certificate of award

Certificate of title: the national computer level 2 certificate Issued by time: March 2016 issuing authority: ministry of education test center

Name: certificate issued by the university English four levels of time: March 2015 issued by institutions: the national college English test band 4 and band 6 committee

Self description

Used to acquire knowledge from books, understand the use of MySQL, Oracle, master the use of the struts 2, Hibernate, Spring, have a systematic knowledge of the front-end (HTML, CSS, jQuery, and JavaScript), occasionally write a blog, are generally write some knowledge integration with Eclipse configuration problem, CSDN blog called Wilson - He

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我的Java路(精选5篇)

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