java语言第二次补充3习题集其他xtjd

1、8 JavaJava 8 JavaJava InputStream 的IO中，所有的stream（包括Input和input StringBufferInputStream：把一个String b)Out Unicodea)Input StringReader：与StringBufferInputStream Out stream 16 Unicode 码来处理字符数据的流。作【5File 16 Unicode 码来处理字符数据的流。作【5File File 1 importimport* Fibonacii20publicclassFibonaciii = 0;f =publicFibona

2、cii( this.i = i;i)* *getFibonacii()if(i2) returnelse f = 1,1f0 = 1;f1=for kreturnelse f = 1,1f0 = 1;f1=for k=2;ki;k+) fk=fk - 1+fk- returnparampublicvoidsaveToFile(Stringname) try Filefile=newFileOutputStreamfo=newl= for i=0;i20;i+) /5if (i!=0 &i% 5=0) catch (Exception e) /testandpublic sicvoidmain(

3、Stringargs) fb20 = null;Fibonaciifb=newFibonacii(20); fb20 = fb.getFibonacii();for i=0;i20;i+) importjava.io.BufferedReader; import java.io.BufferedWriter; import java.io.File;importimportimportjava.io.BufferedReader; import java.io.BufferedWriter; import java.io.File;importimportpublicclassFileDisp

4、layAndCopyFileString/StringBuffer; StringBuffersb=newStringBuffer();paramfileCopy paramfilename publicFileDisplayAndCopy(StringfileCopy,Stringfilename) this.fileCopy=newpublicvoidtryFileReader fr=new FileReader(filename); BufferedReaderbr=newBufferedReader(fr);String str; catch (Exception e) publicv

5、oid catch (Exception e) publicvoidcopy() try FileWriter fw=new FileWriter(fileCopy); catch (Exception e) publicic FileDisplayAndCopyfda=newFileDisplayAndCopy(d:a.txt,d:b.txt); importjava.io.BufferedReader; import java.io.BufferedWriter; import java.io.File;importimport* publicclassFileCharCounterFil

6、e fileDec;StringStringBuffersb=File fileDec;StringStringBuffersb=newpublicFileCharCounter(Stringdec,Stringsrc) this.fileDec = new File(dec);this.src=trycount()sb = new StringBuffer(); FileReaderfr=newFileReader(src);BufferedReaderbr=newStringstr;while(str=br.readLine()!=null) catch (Exception e) ret

7、urn* publicvoidwriteTo() try FileWriterfw=new Stringc=String.valueOf(count(); catch (Exception e) publicic FileCharCounterpublicic FileCharCounterfda=newFileCharCounter(d:a.txt,d:b.txt); 成绩.txt id#000001e#98m#76p#76 id#000002e#54m#74p#76 id#000003e#98m#73p#78 id#000004e#98m#77p#76 id#000005e#92m#45p

8、#76 id#000006e#94m#33p#74 id#000007e#98m#88id#000008e#96m#34importjava.io.BufferedReader; import java.io.FileReader; import java.util.ArrayList; import java.util.Iterator; import java.util.List;import* 3门课的成绩classStudentStringfloat e;float m;float p;returnReturnsreturnReturnsthepublicfloatgetE() ret

9、urn e;paramThee to publicvoidsetE(floate) this.e = e;returnReturnsthepublicStringgetId() return id;paramTheidtopublicvoidsetId(Stringid) this.id = id;returnReturnsthepublicfloatgetM() return m;paramThemto publicvoidsetM(floatm) this.m = m;returnReturnsthepublicfloatgetP() return p;Thepto publicvoids

10、etP(floatp) this.p = p;publicThepto publicvoidsetP(floatp) this.p = p;publicclassCountSStringfilepath;/list Listlist=newpublicCountS(Stringstr) filepath = str;public void init() tryFileReader fr = new FileReader(filepath); BufferedReaderbr=newBufferedReader(fr);Stringwhile(str=br.readLine()!=null) S

11、tudent s = new Student(); = Stringdata=Stringelem= /id =data=elem.split(#)1; elem =data = elem.split(#)1; elem =data = elem.split(#)1; elem =data = elem.split(#)1; elem =data = elem.split(#)1; elem =data = elem.split(#)1; catch (Exception e) publicvoid/0是最小值，1,2floate=newfloatm=newfloatp=newfor(Iter

12、atorit=list.iterator();sNext();)e=(Student)public sic void main(String args) CountScs=newCountS(d:/成绩.txt); 。importimport java.io.FileInputStream; import java.io.FileOutputStream; import java.io.ObjectInputStream; importjava.io.ObjectOutputStream;import* publicclassConteximplementsSerializable* publ

13、icclassConteximplementsSerializableString text1 = ;Stringtext2=*returnReturnsthepublicStringgetText1() return text1;*param*Thetext1topublicvoidsetText1(Stringtext1) this.text1 = text1;*returnReturnsthepublicStringgetText2() return text2;*param*Thetext2topublicvoidsetText2(Stringtext2) this.text2 = t

14、ext2;/forpublic sicvoidmain(Stringargs) Contex c = new Contex();c.setText1(thisistext1); Filefilec.setText1(thisistext1); Filefile=newFile(d:/temp.dat); try FileOutputStream fo = new FileOutputStream(file); ObjectOutputStreamoo=newObjectOutputStream(fo); catch (Exception e) Contex d=null;tryFileInpu

15、tStreamfo=newObjectInputStreamoo=newObjectInputStream(fo); catch (Exception e) 【12Filedelete()方法，编写程序，删除某一个指定文件。 import*File类的delete()publicclassFileDelete File file=null;publicFileDelete(Stringfilename) file=new File(filename);/delete publicvoiddeleteFile() public sic void main(String args) FileDel

16、etef=newFileDelete(d:/temp.dat); import java.awt.Button; importpublic sic void main(String args) FileDeletef=newFileDelete(d:/temp.dat); import java.awt.Button; importjava.awt.FlowLayout; import java.awt.Frame;import java.awt.event.ActionEvent; import java.awt.event.ActionListener; importjava.awt.ev

17、ent.WindowAdapter; import java.awt.event.WindowEvent; import java.io.BufferedInputStream; import java.io.File;importimportimportimportclassFileInputStream file; BufferedInputStreambuf; File filename;publicSound(Filefile=newFileInputStream(filename); buf=newAudioStreamcatch (Exception e) publicclassFileButton btn; Buttonle8_16extendsFramepublicclassFileButton btn; Buttonle8_16ex