Java多線程和輸入輸出流

1、 班級：13科技2班 學號：201324131225 姓名：許耿寧 Java多線程和輸入輸出流一、實驗目的：1.熟悉利用Thread類建立多線程方法。2.熟悉利用Thread接口建立多線程方法。3.熟悉Java的文件讀寫機制，練習輸入輸出流的使用。二、實驗內(nèi)容： 1.閱讀下列程序，分析并上機檢驗其功能。 public class DelayRunnable implements Runnableprivate static int count=0;private int no;private int delay;public DelayRunnable() count+; no=count;

2、public void run() try for (int i=0;i10;i+) delay=(int)(Math.random()*5000); Thread.sleep(delay); System.out.println(Thread +no+ with a delay +delay); catch(InterruptedException e)class MyRunnablepublic static void main(String args)DelayRunnable r1 = new DelayRunnable();DelayRunnable r2 = new DelayRu

3、nnable();Thread thread1=new Thread(r1);Thread thread2=new Thread(r2);thread1.start();thread2.start();tryThread.sleep(1000);catch(InterruptedException e)System.out.println(Thread wrong);2.將上列程序利用Runnable接口改寫，并上機檢驗。3.創(chuàng)建簡單的程序ThreeThread.java，該程序?qū)?chuàng)建三個線程，每個線程應當顯示它所運行的時間（可以考慮使用Date類或Calendar類）。4.鍵盤輸入10個整數(shù)

4、，從小到大進行排序。5.接收鍵盤輸入的字符串，用FileInputStream類將字符串寫入文件，用FileOutputStream類讀出文件內(nèi)容顯示在屏幕上。6.將一個文本文件的內(nèi)容按行讀出，每讀出一行就順序加上行號，并寫入到另一個文件中。三、實驗要求：1.通過實驗掌握Thread 、Runnable使用方法；2.程序必須能夠?qū)崿F(xiàn)多線程；3.程序必須能夠完成題目要求；4.通過實驗掌握文件輸入輸出流的使用方法；5.程序必須能夠從鍵盤接收字符串并保存在文件中；6.程序必須能夠讀出文件內(nèi)容顯示在屏幕上；7.寫出實驗報告。四、實驗代碼及截圖：第一題：在編譯器上運行程序得到截圖所示結(jié)果：第二題：實驗代

5、碼public class DelayThread extends Thread private static int count=0; private int no; private int delay; public DelayThread() count+; no=count; public void run() try for (int i=0;i10;i+) delay=(int)(Math.random()*5000); sleep(delay); System.out.println(Thread +no+ with a delay +delay); catch(Interrup

6、tedException e) class MyThread public static void main(String args) DelayThread thread1=new DelayThread(); DelayThread thread2=new DelayThread(); thread1.start(); thread2.start(); tryThread.sleep(1000);catch(InterruptedException e)System.out.println(Thread wrong); 實驗結(jié)果截圖：第三題：實驗代碼：public class MultiT

7、hread static Lock mylock; public static void main(String args) RunningObject1 r1 = new RunningObject1(); Thread t1 = new Thread(r1, t1); Thread t2 = new Thread(r1, t2); Thread t3 = new Thread(r1, t3); t1.start(); t3.start(); t2.start(); static class RunningObject1 implements Runnable public void run

8、() synchronized(this) String name=Thread.currentThread().getName(); System.out.println(name+開始時間:+Calendar.getInstance().getTimeInMillis(); for (int i = 0; i 100000000; i+) if (i = 9999999) System.out.println(name+結(jié)束時間:+Calendar.getInstance().getTimeInMillis(); break;實驗結(jié)果截圖：第四題：實驗代碼：public class Tes

9、t1 public static void main(String args) throws IOExceptionBufferedReader br=new BufferedReader(new InputStreamReader(System.in);String str;int array=new int10;for(int i=0;i10;i+)int a=i+1;System.out.println(請輸入第+a+整數(shù):);str=br.readLine();arrayi=Integer.parseInt(str);for(int j=0;j9;j+)for(int k=j+1;k1

10、0;k+)if(arraykarrayj)int temp=arrayk; arrayk=arrayj; arrayj=temp;for(int m=0;m10;m+)if(m!=9)System.out.print(arraym+,);elseSystem.out.print(arraym);實驗結(jié)果截圖：第五題：實驗代碼：public class Test2 public static void main(String args) try System.out.println(請輸入內(nèi)容:); File myfile = new File(save.txt); byte outCh = n

11、ew byte100; int bytes = System.in.read(outCh, 0, 100);/將文件讀入二進制數(shù)組中 FileOutputStream Fout = new FileOutputStream(myfile); Fout.write(outCh,0,bytes);/將數(shù)組中的字節(jié)輸入到這個流中 byte inCh = new bytebytes; FileInputStream Fin = new FileInputStream(myfile); Fin.read(inCh); System.out.println(讀取文件內(nèi)容：); System.out.pri

12、ntln(new String(inCh); catch (IOException e) System.out.println(e.toString(); 實驗結(jié)果截圖：第六題：實驗代碼：public class Test3 public static void main(String args) throws IOExceptionString str=null;FileReader file=new FileReader(F:/1.txt);FileWriter b=new FileWriter(F:/2.txt);BufferedWriter c=new BufferedWriter(b);LineNumberReader in=new LineNumberReader(file);while(str=in.readLine()!=null)System.out.