class Main {
public static void main(String[] args) {
final Printer bigPrinter = new BigPrinter();
bigPrinter.printLine("Hello world!");
final Printer smallPrinter = new Printer() {
@Override
public void printLine(final String message) {
System.out.println(message.toLowerCase());
}
};
smallPrinter.printLine("Hello world!");
}
}
public interface Printer {
public void printLine(final String message);
}
public final class BigPrinter implements Printer {
@Override
public void printLine(final String message) {
System.out.println(message.toUpperCase());
}
}