copyfiletest.java

学了2个月java 练习用~ 可以看下 希望同意

import java.io.*;

public class copyfile
{
	public static void main(String[] args) throws Exception
	{
		copy("copyfile.java");
	}

	public static void copy(String a) throws Exception{
		File nowfile=new File(a);
		if(!nowfile.exists()) nowfile.createNewFile();
		BufferedReader readin=new BufferedReader(new InputStreamReader(new FileInputStream(nowfile)));
		BufferedWriter writeout=new BufferedWriter(new OutputStreamWriter(new FileOutputStream("copyfiletest.java")));
		String s;
		RandomAccessFile randomout=new RandomAccessFile("copyfiletest2.java","rw");
		while((s=readin.readLine())!=null){
			System.out.println(s);
			writeout.write(s+"\n");
			randomout.writeChars(s+"\n");
		}
		readin.close();
		writeout.close();
	}
}