import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
public class FileInputOutputExample {
public static void main(String[] args) throws Exception {
InputStream is = new FileInputStream("in.txt");
OutputStream os = new FileOutputStream("out.txt");
int c;
while ((c = is.read()) != -1) {
System.out.print((char) c);
os.write(c);
}
is.close();
os.close();
}
}
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