使用FileInputStream和FileOutputStream类将当前目录中的Write1.txt文件复制成Write2.txt文件
JAVA2程序设计实用教程之Java的面向对象特征上机报告|上机实验实习报告|计算机上机实习报告|使用FileInputStream和FileOutputStream类将当前目录中的Write1.txt文件复制成Write2.txt文件|如果去掉sleep语句（同时去掉catch(InterruptedException e)语句），则运行结果将会是怎样
算法：import java.io.*;
public class Write1
{
public static void main(String args[])
{
try
{
System.out.print("Input: ");
int count,n=512;
byte buffer[] = new byte[n];
count = System.in.read(buffer); //读取标准输入流
FileOutputStream wf1 = new FileOutputStream("Write1.txt");
FileOutputStream wf2 = new FileOutputStream("Write2.txt");
FileInputStream rf=new FileInputStream("Write1.txt");
wf1.write(buffer,0,count); //写入输出流
wf1.close(); //关闭输出流
System.out.println("Save to Write1.txt!");
rf.read(buffer,0,count);
wf2.write(buffer,0,count);
wf2.close();
rf.close();
System.out.println("copy to Write2.txt!");
}
catch (IOException ioe)
{
System.out.println(ioe);
}
catch (Exception e)
{
System.out.println(e);
}
}
}
结果：若图片无法显示请联系站长QQ3249114
如果去掉sleep语句（同时去掉catch(InterruptedException e)语句），则运行结果将会是怎样？
算法：import java.io.*;
public class Pipedstream
{
public static void main (String args[])
{
PipedInputStream in = new PipedInputStream();
PipedOutputStream out = new PipedOutputStream();
try
{
in.connect(out);
}
catch(IOException ioe) { }
Send s1 = new Send(out,1);
Send s2 = new Send(out,2);
Receive r1 = new Receive(in);
Receive r2 = new Receive(in);
s1.start(); s2.start();
r1.start(); r2.start();
}
}
class Send extends Thread //发送线程
{
PipedOutputStream out;
static int count=0; //记录线程个数
int k=0;
public Send(PipedOutputStream out,int k)
{
this.out= out;
this.k= k;
this.count++; //线程个数加1
}
public void run( )
{
System.out.print("\r\nSend"+this.k+": "+this.getName()+" ");
int i=k;
try
{
while (i<10)
{
out.write(i);
i+=2;
//sleep(1);
}
if (Send.count==1) //只剩一个线程时
{
out.close(); //关闭输入管道流
System.out.println(" out closed!");
}
else
this.count--; //线程个数减1
}
//catch(InterruptedException e) { }
catch(IOException e) { }
}
}
class Receive extends Thread //接收线程
{
PipedInputStream in;
public Receive(PipedInputStream in)
{
this.in = in;
}
public void run( )
{
System.out.print("\r\nReceive: "+this.getName()+" ");
try
{
int i = in.read();
while (i!=-1) //输入流未结束时
{
System.out.print(i+" ");
i = in.read();
//sleep(1);
}
in.close(); //关闭输入管道流
}
// catch(InterruptedException e) { }
catch(IOException e)
{
System.out.println(e);
}
}
}
结果：若图片无法显示请联系站长QQ3249114