Java中實現txt文件的複製

import java.io.FileReader;

import java.io.FileWriter;

import java.io.IOException;

public class CopyTextTest

{

/**

* @param args

* @throws IOException 

*/

public static void main(String[] args) throws IOException

{

FileReader fr = new FileReader("demo.txt");

FileWriter fw = new FileWriter("copydemo.txt");

int ch = 0;

while ((ch= fr.read())!=-1)

{

fw.write(ch);

}

fr.close();

fw.close();

}

}