PPT Slide

class Translate {

public static void main(String[] args) {

InputStream in = System.in;

OutputStream out = System.out;

if (args.length != 2) error("must provide from/to arguments");

String from = args[0], to = args[1]; int ch, i;

if (from.length() != to.length())

error("from and to must be the same length");

try {

while ((ch = in.read()) != -1) {

if ((i = from.indexOf(ch)) != -1)

out.write(to.charAt(i));

else out.write(ch);

}

} catch(IOException e) {

error("I/O Exception: " + e); } }

public static void error(String err) {

System.err.print("Translate: " + err);

System.exit(1); // Error return } } }

I am a dog.

I zm z dog.