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1、作业一：/第二章 75 页 1)找出一个二维数组的鞍点，即该位置上的元素在该行上最大、在列上最小（也可能没有鞍点） 。 public class ArrayMaxMinpublic static void main(String args)int i,j,k,l,g;int two_array=10,6,5,1,2,4,16,7,11;for(i=0;itwo_arrayik)+l;if(l=two_array0.length-1)for(k=0;k=90)System.out.println(“该课程成绩等级为：优。“);else if(subScore=80)System.out.prin
2、tln(“该课程成绩等级为：良。“);else if(subScore=70)System.out.println(“该课程成绩等级为：中。“);else if(subScore=60)System.out.println(“该课程成绩等级为：一般。“);elseSystem.out.println(“该课程成绩等级为：不及格。“); class Postgraduate extends Studentpublic void subScore()if(getsubScore()=95)System.out.println(“该课程成绩为 5“);elseSystem.out.println(“
3、该课程成绩为“+(int)getsubScore()/20); class Undergraduate extends Studentpublic void scoreRank()if(getsubScore()=85elseSystem.out.println(“该课程等级为 C“); public class StudentTesterpublic static void main(String args)Student stu=new Student3;stu0=new Undergraduate();stu1=new Postgraduate();stu2=new Student();
4、stu0.setstu(“test1“,86.6,92);stu1.setstu(“test2“,93,91);stu2.setstu(“test3“,85,89.5);for(int i=0;i=0;i-)dest.append(source.charAt(i);return dest.toString(); public static void wordStatistic(String source) int sum,i,j,count;String a = source.split(“s“);sum=a.length;int ss=new intsum;for(i=0;ib)upper=
5、middle;else if(temp-1j-;bj+1=temp;System.out.print(“排序后：“);for(int i=0;ia;i+)System.out.print(bi+“ “);System.out.println();arrayPosition(b); 【课件】作业八：/第五章 180 页 例 5-16:音像店的出租电影业务，在实际应用中，可能会通过以下方式查找需要的电影: 1.通过标题(title)查找电影； 2.可将电影分成不同的类型(type)，如喜剧片、悲剧片、战斗片等。在进行出租时，可在某一特 定的类型中查找电影； 3.查找包括某一演员(actor/act
6、ress)的电影。 import java.util.*; class Movie private String title, type; private Vector actors; public String getTitle() return title; public String getType() return type; public Vector getActors() return actors; public void setTitle(String aTitle) title = aTitle; public void setType(String aType) type
7、 = aType; public Movie() this(“?“, “?“); public Movie(String aTitle, String aType) title = aTitle; type = aType; actors = new Vector(); public String toString() return(“Movie: “ + “ + title + “); public void addActor(String anActor) actors.add(anActor); class MovieStore private Hashtable movieList,
8、actorList, typeList; public Hashtable getMovieList() return movieList; public Hashtable getActorList() return actorList; public Hashtable getTypeList() return typeList; public MovieStore() movieList = new Hashtable(); actorList = new Hashtable(); typeList = new Hashtable(); public String toString()
9、return (“MovieStore with “ + movieList.size() + “ movies.“); public void addMovie(Movie aMovie) movieList.put(aMovie.getTitle(), aMovie); if (!typeList.containsKey(aMovie.getType() typeList.put(aMovie.getType(),new Vector(); (Vector)typeList.get(aMovie.getType().add(aMovie); for (int i=0; iaMovie.ge
10、tActors().size(); i+) String anActor = (String)aMovie.getActors().get(i); if (!actorList.containsKey(anActor) actorList.put(anActor, new Vector(); (Vector)actorList.get(anActor).add(aMovie); private void removeMovie(Movie aMovie) movieList.remove(aMovie.getTitle(); (Vector)typeList.get(aMovie.getTyp
11、e().remove(aMovie); if (Vector)typeList.get(aMovie.getType().isEmpty() typeList.remove(aMovie.getType(); for(int i=0; iaMovie.getActors().size(); i+) String anActor = (String)aMovie.getActors().get(i); (Vector)actorList.get(anActor).remove(aMovie); if (Vector)actorList.get(anActor).isEmpty() actorLi
12、st.remove(anActor); public void removeMovie(String aTitle) if (movieList.get(aTitle) = null) System.out.println(“No movie with that title“); else removeMovie(Movie)movieList.get(aTitle); public void listMovies() Enumeration titles = movieList.keys(); while(titles.hasMoreElements() System.out.println
13、(titles.nextElement(); public void listMoviesWithActor(String anActor) Enumeration someMovies = (Vector)actorList.get(anActor).elements(); while(someMovies.hasMoreElements() System.out.println(someMovies.nextElement(); public void listMoviesOfType(String aType) Enumeration someMovies = (Vector)typeL
14、ist.get(aType).elements(); while(someMovies.hasMoreElements() System.out.println(someMovies.nextElement(); 作业十：/第七章 100 页 用两个线程模拟银行账户的存取款操作。 三个类：账户类、存款类、取款类； 要求：两个线程分别操作 5 次，每次随机存取 5001000 元，实时显示两线程的操作过程对账户的影响。 注意：取款线程不一定每次都能取到钱。class Accountdouble balance;public Account()balance=0;System.out.printl
15、n(“total Money:“+balance);public synchronized void withdraw(double money)if(balance=0)trywait();catch(InterruptedException e)balance=balance-money;System.out.println(“withdraw 500 success“);notify();public synchronized void deposite(double money)if(balance!=0)trywait();catch(InterruptedException e)balance=balance+money;System.out.println(“deposite 500 success“);notify(); class WithdrawThread extends ThreadAccount account;public Withd
