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public interface IMessageService {
void sendMessage(String message);
}
public class MessageServiceImpl implements IMessageService {
@Override
public void sendMessage(String message) {
System.out.println("Sending message: " + message);
}
}
public class MessageProxy implements IMessageService {
private IMessageService realMessageService;
public MessageProxy(IMessageService realMessageService) {
this.realMessageService = realMessageService;
}
@Override
public void sendMessage(String message) {
System.out.println("Logging message...");
realMessageService.sendMessage(message);
}
}
public class Main {
public static void main(String[] args) {
IMessageService service = new MessageProxy(new MessageServiceImpl());
service.sendMessage("Hello students!");
}
}
]]>