Java综合测试题答案.doc

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1、thrift of excellent traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development, and reform made major progress, and people living significantly improve, and social the career made new progress, no necessary always hard has, n

2、o awareness to China also has many poverty area, and also has many poverty population of exists, more living improve has, more need keep hard of style. Three is not strictly honest. Total thought units is a water sector, clean self-discipline away from himself too far, no real processing good living

3、 of improve and hard, and thrift excellent traditional of relationship, no effective do comply with Constitution and party of regulations must from I do up, no right mercy good bitter Le, and wealth of relationship, no right awareness to in comply with Constitution and party of regulations aspects e

4、veryone has accountability. Four, future direction and improvement measures 1, belief and faith, strengthen party spirit. One is to firmly establish the noble ideals of struggle for the ideals of communism, communist struggle for life, ready to sacrifice everything for the party and the people. Seco

5、nd is to continuously improve the quality and standard of political, conscientiously study Deng Xiaoping theory and “three represents“ important thought and the scientific Outlook on development, implement the partys basic program for the primary stage of socialism, adhere to the correct political o

6、rientation, maintain highly consistent with the CPC Central Committee, is good at theories of socialism with Chinese characteristics to analyze and solve problems. Third, strengthening the party spirit and the world transformation, perseverance of the party Constitution, relive Party vows to establi

7、sh correct world Outlook, Outlook on life and the world, practically embodies ideals and beliefs into action, combine lofty ideals and practical activities, transforming the objective world, actively participate in the great practice of building socialism with Chinese characteristics. 2, keep the pu

8、rpose in concept, changing the style of work. First, keep in mind that the purpose of serving, adhere to assuming power for the people, keep in mind the people and care about people, and the joys and sorrows of the masses, .According to city discipline, and municipal organization Department requirem

9、ents, today we held “implement implementation independent Commission against corruption guidelines effective strengthening led cadres style construction“ topic democratic life, main task is close contact thought, and work actual, control check district Standing Committee team and the personal in imp

10、lementation independent Commission against corruption guidelines Shang exists of problem, in-depth carried out criticism and self-critical, further clear rectification direction and measures, effective enhanced clean politics of consciousness and initiative, firm set good of ruling image. Before the

11、 meeting, the way we take surveys solicited a views, combed, related to team buildingproject work, cadres, cadres selection and other aspects of a total of 19, further defined the direction of rectification, enhancing the pertinence and effectiveness of democratic life. Good for this meeting, we req

12、uested the Standing Committee of the municipal party Committee, municipal Secretary General Tang Wenjin, the City Commission for discipline inspection Standing Committee Yang Xu, Jiang Jixue, Deputy Director of the personnel office, and other leading comrades present guidance allows us to warm appla

13、use for their welcome and thanks! Below, I first District Committee member of the 20XX team annual democratic meeting implementation of the corrective measures, as well as member of the team and of my own report guidelines for the implementation of the independent Commission against corruption state

14、ment invited leaders and comrades criticism. First, annual party on the 20XX team, Member of democratic life action plan implementation year 20XX, district democratic meeting a member of the team on “study and practice the scientific Outlook on development“ theme, find a project supporting strong en

15、ough, the industry well enough, urban construction management level needs to be improved, livelihood improvement needs to be strengthened, district team itself, such as the five aspects. Year of 20XX, we find out the problems mentioned above, based on actual Shunqing construction and development, co

16、nscientiously sum up improvements, achieving significant development results and effectiveness of their work. (A) highlight the project handle, maintain high growth of investment. Adhere to the strategy as a Foundation, carrying out projects to promote increased stamina important. One is to increase

17、 the intensity of projects towards. Actively seek national and provincial policy support, superior special transfer payments, a variety of additional income will top 700 million Yuan, a number of key infrastructure projects, livelihood projects, industrial projects into the cage. Second, increasing

18、the project attracts. This year a total of 23 signed a major project, of which 14 billion project, China Metallurgical group, vanke group, Guangdong hengda group, Taiwan Ruentex group, on the RI group, Shenzhen Kaisa, jifeng agricultural machinery, Mercedes-Benz, Audi 4S store and other large enterp

19、rises and projects have settled in Shunqing. Third, strengthen project construction. Annual implementation focus project 39 a, fixed assets investment total will breakthrough 12 billion yuan, created district yilai history high, South door dam, and five in shop old city transformation, and Ying Chin

20、a industrial concentrated district construction, and city main road construction, and Northeast steam Trade Center, and modern farmers industry Park, and vocational education city, and low rental, and also room construction, and features blocks build, and farmers market transformation, and “rural ve

21、rsion“ Street transformation, focus engineering speed up implementation, effectiveness obviously. Expected to be achieved this year, area-wide GDP 17 billionC B C A CC A D D DA B1. String、StringBuffer 以及 StringBuilder 的区别简要的说, String 类型和 StringBuffer 类型的主要性能区别其实在于 String 是不可变的对象, 因此在每次对 String 类型进行改

22、变的时候其实都等同于生成了一个新的 String 对象,然后将指针指向新的 String 对象,所以经常改变内容的字符串最好不要用 String ,因为每次生成对象都会对系统性能产生影响,特别当内存中无引用对象多了以后, JVM 的 GC 就会开始工作,那速度是一定会相当慢的。每个字符串缓冲区都有一定的容量。只要字符串缓冲区所包含的字符序列的长度没有超出此容量,就无需分配新的内部缓冲区数组。如果内部缓冲区溢出,则此容量 自动增大。从 JDK 5.0 开始,为该类增添了一个单个线程使用的等价类,即 StringBuilder 。与该类相比,通常应该优先使用 StringBuilder 类,因为它

23、支持所有相同的操作,但由于它不执行同步,所以速度更快。但是如果将 StringBuilder 的实例用于多个线程是不安全的。需要这样的同步,则建议使用 StringBuffer2. 说说 ArrayList 和 LinkedList、HashMap 和 Hashtable 的区别ArrayList 采用的是数组形式来保存对象的,这种方式将对象放在连续的位置中,所以最大的缺点就是插入删除时非常麻烦LinkedList 采用的将对象存放在独立的空间中,而且在每个空间中还保存下一个链接的索引 但是缺点就是查找非常麻烦 要丛第一个索引开始Hashtable 和 HashMap 类有三个重要的不同之处。

24、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。 也许最重要的不同是 Hashtable 的方法是同步的,而 HashMap 的方法不是。这就意味着,虽然你可以不用采取任何特殊的行为就可以在一个多线程的应用程序中用一个Hashtable,但你必须同样地为一个 HashMap 提供外同步。一个方便的方法就是利用Collections 类的静态的 synchronizedMap()方法,它创建一个线程安全的 Map 对象,并把它作为一个封装的对象来返回。这个对象的方法可以让你同步访问潜在的

25、HashMap。这么做的结果就是当你不需要同步时,你不能切断 Hashtable 中的同步(比如在一个单线程的应用程序中) ,而且同步增加了很多处理费用。 第三点不同是,只有 HashMap 可以让你将空值作为一个表的条目的 key 或value。HashMap 中只有一条记录可以是一个空的 key,但任意数量的条目可以是空的value。这就是说,如果在表中没有发现搜索键,或者如果发现了搜索键,但它是一个空的值,那么 get()将返回 null。如果有必要,用 containKey()方法来区别这两种情况。z3. 如何创建并启动一个新线程?线程的状态有哪些?说一说他们之间是如何转化的?thri

26、ft of excellent traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development, and reform made major progress, and people living significantly improve, and social the career made new progress, no necessary always hard has, no aw

27、areness to China also has many poverty area, and also has many poverty population of exists, more living improve has, more need keep hard of style. Three is not strictly honest. Total thought units is a water sector, clean self-discipline away from himself too far, no real processing good living of

28、improve and hard, and thrift excellent traditional of relationship, no effective do comply with Constitution and party of regulations must from I do up, no right mercy good bitter Le, and wealth of relationship, no right awareness to in comply with Constitution and party of regulations aspects every

29、one has accountability. Four, future direction and improvement measures 1, belief and faith, strengthen party spirit. One is to firmly establish the noble ideals of struggle for the ideals of communism, communist struggle for life, ready to sacrifice everything for the party and the people. Second i

30、s to continuously improve the quality and standard of political, conscientiously study Deng Xiaoping theory and “three represents“ important thought and the scientific Outlook on development, implement the partys basic program for the primary stage of socialism, adhere to the correct political orien

31、tation, maintain highly consistent with the CPC Central Committee, is good at theories of socialism with Chinese characteristics to analyze and solve problems. Third, strengthening the party spirit and the world transformation, perseverance of the party Constitution, relive Party vows to establish c

32、orrect world Outlook, Outlook on life and the world, practically embodies ideals and beliefs into action, combine lofty ideals and practical activities, transforming the objective world, actively participate in the great practice of building socialism with Chinese characteristics. 2, keep the purpos

33、e in concept, changing the style of work. First, keep in mind that the purpose of serving, adhere to assuming power for the people, keep in mind the people and care about people, and the joys and sorrows of the masses, .According to city discipline, and municipal organization Department requirements

34、, today we held “implement implementation independent Commission against corruption guidelines effective strengthening led cadres style construction“ topic democratic life, main task is close contact thought, and work actual, control check district Standing Committee team and the personal in impleme

35、ntation independent Commission against corruption guidelines Shang exists of problem, in-depth carried out criticism and self-critical, further clear rectification direction and measures, effective enhanced clean politics of consciousness and initiative, firm set good of ruling image. Before the mee

36、ting, the way we take surveys solicited a views, combed, related to team buildingproject work, cadres, cadres selection and other aspects of a total of 19, further defined the direction of rectification, enhancing the pertinence and effectiveness of democratic life. Good for this meeting, we request

37、ed the Standing Committee of the municipal party Committee, municipal Secretary General Tang Wenjin, the City Commission for discipline inspection Standing Committee Yang Xu, Jiang Jixue, Deputy Director of the personnel office, and other leading comrades present guidance allows us to warm applause

38、for their welcome and thanks! Below, I first District Committee member of the 20XX team annual democratic meeting implementation of the corrective measures, as well as member of the team and of my own report guidelines for the implementation of the independent Commission against corruption statement

39、 invited leaders and comrades criticism. First, annual party on the 20XX team, Member of democratic life action plan implementation year 20XX, district democratic meeting a member of the team on “study and practice the scientific Outlook on development“ theme, find a project supporting strong enough

40、, the industry well enough, urban construction management level needs to be improved, livelihood improvement needs to be strengthened, district team itself, such as the five aspects. Year of 20XX, we find out the problems mentioned above, based on actual Shunqing construction and development, consci

41、entiously sum up improvements, achieving significant development results and effectiveness of their work. (A) highlight the project handle, maintain high growth of investment. Adhere to the strategy as a Foundation, carrying out projects to promote increased stamina important. One is to increase the

42、 intensity of projects towards. Actively seek national and provincial policy support, superior special transfer payments, a variety of additional income will top 700 million Yuan, a number of key infrastructure projects, livelihood projects, industrial projects into the cage. Second, increasing the

43、project attracts. This year a total of 23 signed a major project, of which 14 billion project, China Metallurgical group, vanke group, Guangdong hengda group, Taiwan Ruentex group, on the RI group, Shenzhen Kaisa, jifeng agricultural machinery, Mercedes-Benz, Audi 4S store and other large enterprise

44、s and projects have settled in Shunqing. Third, strengthen project construction. Annual implementation focus project 39 a, fixed assets investment total will breakthrough 12 billion yuan, created district yilai history high, South door dam, and five in shop old city transformation, and Ying China in

45、dustrial concentrated district construction, and city main road construction, and Northeast steam Trade Center, and modern farmers industry Park, and vocational education city, and low rental, and also room construction, and features blocks build, and farmers market transformation, and “rural versio

46、n“ Street transformation, focus engineering speed up implementation, effectiveness obviously. Expected to be achieved this year, area-wide GDP 17 billion1) 如何创建并启动一个新线程?java 语言已经内置了多线程支持,所有实现 Runnable 接口的类都可被启动一个新线程,新线程会执行该实例的 run()方法,当 run()方法执行完毕后,线程就结束了。一旦一个线程执行完毕,这个实例就不能再重新启动,只能重新生成一个新实例,再启动一个新线

47、程。 Thread 类是实现了 Runnable 接口的一个实例,它代表一个线程的实例,并且,启动线程的唯一方法就是通过 Thread 类的 start()实例方法: Thread t = new Thread(); t.start(); start()方法是一个 native 方法,它将启动一个新线程,并执行 run()方法。Thread 类默认的 run()方法什么也不做就退出了。注意:直接调用 run()方法并不会启动一个新线程,它和调用一个普通的 java 方法没有什么区别。 因此,有两个方法可以实现自己的线程: 方法 1:自己的类 extend Thread,并复写 run()方法,

48、就可以启动新线程并执行自己定义的 run()方法。例如: public class MyThread extends Thread public run() System.out.println(“MyThread.run()“); 在合适的地方启动线程:new MyThread().start(); 方法 2:如果自己的类已经 extends 另一个类,就无法直接 extends Thread,此时,必须实现一个 Runnable 接口: public class MyThread extends OtherClass implements Runnable public run() Sys

49、tem.out.println(“MyThread.run()“); 为了启动 MyThread,需要首先实例化一个 Thread,并传入自己的 MyThread实例: MyThread myt = new MyThread(); Thread t = new Thread(myt); t.start();2) 线程的状态有哪些?说一说他们之间是如何转化的?初始态:一个线程调用了 new 方法之后,并在调用 start 方法之前的所处状态。就绪:一旦线程调用了 start 方法,线程就转到 Runnable 状态,阻塞/ NonRunnable:线程处于阻塞/NonRunnable 状态,这是由两种可能性造成的:要么是因挂起而暂停的,要么是由于某些原因而阻塞的,例如包括等待 IO 请求的完成。 停止/退出:线程转到退出状态,这有两种可能性,要么是 run 方法执行结束,要么是thrift of excellent traditional and style lack deep of understanding, one-sided think in now of good situation Xia, economic smooth more fast development,

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