#keywords
{{{#!gcode
	if (args.length == 0) {
		System.err.println("[input filename] [output filename]");
		System.exit(1);
	}
	
	long startTime = System.currentTimeMillis();		
	try {
		FileInputStream fi = new FileInputStream(args[0]);	
		FileOutputStream fo = new FileOutputStream(args[1]);	
		
		byte[] buf = new byte[8096];
		int readSeq = 0;
		
		while ((readSeq = fi.read(buf)) != -1) {	
			fo.write(buf, 0, readSeq);
		}
		
		fi.close();
		fo.close();				
	} catch(IOException e) {
		System.err.print(e.getLocalizedMessage());
		System.exit(1);
	} 
	long elapsedTime = System.currentTimeMillis();
	
	System.out.format("%s %.4fs\n", "execution time", (elapsedTime - startTime) / 1000.0);
}}}
----
{{{
c:\test>my
[input filename] [output filename]
----
c:\test>my abc
abc (지정된 파일을 찾을 수 없습니다)
----
c:\test>my vsrename.exe vs2.exe
execution time 0.0310s
}}}