小弟我是一个菜鸟求高手帮小弟我看一下小弟我这哪儿错啦咋回事_J2SE

求助我是一个初学者求高手帮我看一下我这哪儿错啦怎么回事啊

package 第十四章.IO;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class D316 {//有问题
public static void main(String[] args) {
try {
FileInputStream fileinputstream=new FileInputStream(new File("C:/a.text"));
InputStreamReader inputstreamreader=new InputStreamReader(fileinputstream);
FileOutputStream fileoutputstream=new FileOutputStream(new File("C:/b.text"));
OutputStreamWriter outputstreamwriter=new OutputStreamWriter(fileoutputstream);
int ch;
while ((ch=inputstreamreader.read())!=-1) {
System.out.print(ch+" ");
outputstreamwriter.write(ch);
}
inputstreamreader.close();
outputstreamwriter.close();

} catch (IOException e) {
e.printStackTrace();
}
}
}

------解决方案--------------------

Java code

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;public class D316 {// 有问题    public static void main(String[] args) {        try {            FileInputStream fileinputstream = new FileInputStream(new File("C:"+File.separator+"a.txt"));//这里有问题            InputStreamReader inputstreamreader = new InputStreamReader(                    fileinputstream);            FileOutputStream fileoutputstream = new FileOutputStream(new File(                    "C:"+File.separator+"b.txt"));//还有这里            OutputStreamWriter outputstreamwriter = new OutputStreamWriter(                    fileoutputstream);            int ch;            while ((ch = inputstreamreader.read()) != -1) {                System.out.print((char)ch + " ");                outputstreamwriter.write(ch);            }            inputstreamreader.close();            outputstreamwriter.close();        } catch (IOException e) {            e.printStackTrace();        }    }}
------解决方案--------------------
ava.io.FileNotFoundException: C:\a.txt (系统找不到指定的文件。)

这个是个文件Copy程序,你的源文件c:\a.txt必须存在,先用编辑器(如记事本)在C:\建一个a.txt程序就可以了