实验3 字符串应用与面向对象程序设计.doc

青 岛 理 工 大 学课程实验报告课程名称Java面向对象程序设计班级软件114实验日期2013-10-19姓名学号201107286实验成绩实验名称实验3 字符串应用与面向对象程序设计实验目的及要求（给出本次实验所涉及并要求掌握的知识点）学习使用Eclipse编写运行Java程序，综合应用Java的继承与接口技术以及字符串的相关操作。实验环境（列出本次实验所使用的平台和相关软件）eclipse环境Windows7. JDK6， Notepad+实验内容（给出实验内容具体描述）编写一个Java项目，模拟一次包括老师备课，同学上课，布置作业和做作业的课堂教学过程。作业为判断字符串是否为2-重复串及其他字符串操作内容。算法描述及实验步骤（用适当的形式表达算法设计思想与算法实现步骤）1、创建Java项目JavaTeaching20122、创建包cn.qtech.util，在其中新建类RepeatedStringEstimator，该类有两个方法：（1）public boolean estimate(String s)，用于判断字符串s是不是2-重复串（字符串中每个出现的字符出现2次且仅两次），如判断aaaa不是，abddab是，acbcab是。（2）public void stringOperate(),其中调用适当的字符串操作完成(a)判断两个字符传”abc”和”acb”是否相同，(b)输出c:javajspA.java中第二次出现j的位置，并输出该位置起到串末的子串。3、创建包cn.qtech.teaching，在其中新建抽象类UniversityPeople，包含一个抽象方法void doDuty(TeachingMessage msg)，表示某人完成自己的任务。4、在包cn.qtech.teaching中创建枚举类型TeachingState，其中包括常量BEIKE, TINGKE, BUZHIZUOYE, ZUOZUOYE，分别表示备课，听课，布置作业，做作业。5、在包cn.qtech.teaching中创建Student类继承自UniversityPeople，该类有成员变量name及name的getter/setter方法。实现的doDuty(TeachingMessage msg)方法中如果判断msg的状态为BEIKE，则修改msg状态为TINGKE并输出：老师+msg中老师对象名+备完课后，去听课！；如果判断msg的状态为BUZHIZUOYE，则修改msg状态为ZUOZUOYE并输出：老师+msg中老师对象名+布置完课作业后，开始做作业！，然后调用RepeatedStringEstimator中的两个方法输出作业结果。6、在包cn.qtech.teaching中创建Teacher类继承自UniversityPeople，该类有成员变量name及name的getter/setter方法。实现的doDuty(TeachingMessage msg)方法中如果判断msg的状态为TINGKE，则修改msg状态为BUZHIZUOYE并从msg中获得并输出听课学生名单，然后输出“学生听完课后，开始布置作业！”。7、在包cn.qtech.teaching中创建TeachingMessage类，用于封装上课的相关信息，其有三个对象及对应的getter/setter方法, Teacher teacher为上课的老师，Student students为听课的学生，TeachingState state为课堂教学的状态，该状态初始值为BEIKE。8、在包cn.qtech.teaching中创建客户端Teaching类，该类有个一个void doOneTeaching()方法，其中设置学生的学名（如李四,张三,王五），老师的姓名（如“周炜”），并模拟一次从备课到做作业的课堂教学过程。调试过程及实验结果总结（对实验结果进行分析，问题回答，实验心得体会及改进意见）package cn.qtech.util;public class RepeatedStringEstimator public boolean estimate(String s)char str=s.toCharArray();for(int i=0;istr.length;i+)int num=0; for(int j=0;jstr.length;j+) if(int)stri=(int)strj) num+; /aadddbb if(num!=2) return false; return true;public void stringOperate() String s1=abc;String s2=acb;int number=0;for(int k = 0;k0) System.out.println(s1+与+s2+字符串相同+!); else System.out.println(s1+与+s2+内容不相同+!); String path=c:javajspA.java; int index=path.indexOf(j); index=path.indexOf(j,index+1); String sub=path.substring(index); System.out.println(c:javajspA.java+中第2次出现j的位置为+index); index=path.lastIndexOf(j); /sub=path.substring(index+1); System.out.println(其后的字串为+sub); package cn.qtech.teaching;import cn.qtech.util.RepeatedStringEstimator;public class Student extends UniversityPeople String name; public void setter(String name) = name; public String getter() return name; void doDuty(TeachingMessage msg) if(msg.getter3() = TeachingState.BEIKE) msg.setter(TeachingState.TINGKE); System.out.println(老师+msg.getter1().getter()+备完课后，去听课！); if(msg.getter3() = TeachingState.BUZHIZUOYE) msg.setter(TeachingState.ZUOZUOYE); System.out.println(老师+msg.getter1().getter()+布置完课后作业，开始做作业！); RepeatedStringEstimator r= new RepeatedStringEstimator(); String str1=aaaa; if(r.estimate(str1) System.out.println(aaaa是2-重复串！); else System.out.println(aaaa不是2-重复串！); String str2=abddab; if(r.estimate(str2) System.out.println(abddab是2-重复串！); else System.out.println(abddab不是2-重复串！); String str3=acbcab; if(r.estimate(str3) System.out.println(acbcab是2-重复串！); else System.out.println(acbcab不是2-重复串！); r.stringOperate(); package cn.qtech.teaching;public class Teacher extends UniversityPeople String name; public void setter(String name) = name; public String getter() return name; void doDuty(TeachingMessage msg) if(msg.getter3()=TeachingState.TINGKE)msg.setter(TeachingState.BUZHIZUOYE);Student st=msg.student;System.out.println(听课学生名单:.);for(int i=0;ist.length;i+)System.out.println(i+1)+:+sti.getter()+.);System.out.println(.);System.out.println(学生听完课后，开始布置作业！);/* if(msg.state = TeachingState.TINGKE) msg.state = TeachingState.BUZHIZUOYE; Student stu = new Student3; stu0 = null; stu1 = null; stu2 = null; stu = msg.getter2();System.out.println(听课学生名单：); System.out.println(-);System.out.println(1:+stu0.getter()+2:+stu1.getter()+3:+stu2.getter(); System.out.println(-); System.out.println(学生听完课后，开始布置作业！); */package cn.qtech.teaching;public class Teaching public void doOneTeaching()Student student = new Student3; student0 = new Student(); student1 = new Student(); student2 = new Student(); student0.setter(李四); student1.setter(张三); student2.setter(王五); Teacher teacher = new Teacher();teacher.setter(周炜);TeachingMessage msg = new TeachingMessage(); msg.setter(teacher); msg.setter(student); student0.doDuty(msg); teacher.doDuty(msg); student0.doDuty(msg); public static void main(String args) Teaching teaching = new Teaching();teaching.doOneTeaching(); package cn.qtech.teaching;public class TeachingMessage Teacher teacher = new Teacher(); Student student= new Student3; TeachingState state = TeachingState.BEIKE; public Teacher getter1() return teacher; public void setter(Teacher tea) teacher = tea; public Student getter2() return student; public void setter(Studentstu) student = stu; public TeachingState