Java語言實驗報告四

《Java語言與面向?qū)ο蟪绦蛟O(shè)計基礎(chǔ)》課程實驗報告四姓名：學(xué)號：111**********實驗題1[實驗要求]掌握J(rèn)avaIO流辦理掌握文件操作掌握多線程程序設(shè)計[實驗程序]importjava.io.*;publicclassTest4_1{publicstaticvoidmain(String[]args){try{File("C:/Test");if(!myDir.exists( ))myDir.mkdir( );elseif(!myDir.isDirectory( )){System.err.println("'C:/Test'isnotadirectory");return;},"a.txt");f.createNewFile( );out=new(f);for(inti=0;i<26;i++){out.write((char)('A'+i));}out.close( );}catch(IOExceptione){System.out.println(e);}}}[運(yùn)轉(zhuǎn)結(jié)果][實驗結(jié)論與收獲]掌握文件及文件夾的創(chuàng)立及文件的寫入。實驗題2[實驗要求]將實驗1題中新建的"a.txt"文件內(nèi)容復(fù)制到"C:\Test\Ex"目錄中"b.txt"文件中。[實驗程序]importjava.io.*;publicclassTest4_2{publicstaticvoidmain(String[]args){try{File("C:/Test/Ex");if(!myDir.exists( ))myDir.mkdir( );elseif(!myDir.isDirectory( )){System.err.println(myDir+"isnotadirectory");return;}=new,"b.txt");my( );in=new("C:/Test/a.txt");BufferedReaderbufIn=newBufferedReader(in);out=new(myFile);BufferedWriterbufOut=newBufferedWriter(out);Stringline;line=bufIn.readLine( );//System.out.println(line);while(line!=null){System.out.println(line);bufOut.write(line,0,line.length( ));bufOut.newLine( );line=bufIn.readLine( );}bufIn.close( );bufOut.close( );}catch(IOExceptione){System.out.println(e);}}}[運(yùn)轉(zhuǎn)結(jié)果][實驗結(jié)論與收獲]掌握文件讀取和寫入。實驗題3[實驗要求]?將實驗1題中新建的“a.txt”文件中寫入字符“*”，替代第6個字符。[實驗程序]importjava.io.*;publicclassTest4_3{publicstaticvoidmain(String[]args){try{RandomAccessFiler=newRandomAccessFile("C:/Test/a.txt","rw");r.seek(5);r.write('*');r.close( );}catch(IOExceptione){System.out.println(e);}}}[運(yùn)轉(zhuǎn)結(jié)果][實驗結(jié)論與收獲]掌握隨機(jī)文件創(chuàng)立與寫入。實驗題4[實驗要求]調(diào)試并記錄多線程程序（生產(chǎn)者/花費者實例）結(jié)果。領(lǐng)會多線程體制。[實驗程序]Consumer.javaclassConsumerimplementsRunnable{SStacktheStack;publicConsumer(SStacks){theStack=s;}publicvoidrun( ){charc;for(inti=0;i<20;i++){c=theStack.pop( );System.out.println("Consumed:"+c);try{Thread.sleep((int)(Math.random( )*1000));}catch(InterruptedExceptione){}}}}Producer.javaclassProducerimplementsRunnable{SStacktheStack;publicProducer(SStacks){theStack=s;}publicvoidrun( ){charc;for(inti=0;i<20;i++){=(char)(Math.random( )*26+'A');theStack.push(c);System.out.println("Produced:"+c);try{Thread.sleep((int)(Math.random( )*100));}catch(InterruptedExceptione){}}}}SStack.javaclassSStack{privateintindex=0;privatechar[]data=newchar[10];publicsynchronizedvoidpush(charc){while(index==data.length){try{this.wait( );}catch(InterruptedExceptione){

}}this.notify( );data[index]=c;index++;}publicsynchronizedcharpop( ){while(index==0){try{this.wait( );}catch(InterruptedExceptione){

}}this.notify( );index--;returndata[index];}}STest.javapublicclassSTest{publicstaticvoidmain(Stringargs[]){SStackstack=newSStack( );Runnablep=newPro