Notes

public interface IDisplay {
public String readLine();
}

Basel H.



import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;


public class TimeDisplay extends Decorator{
private LocalDateTime time;
private DateTimeFormatter format=DateTimeFormatter.ofPattern("HH:mm:ss");
public TimeDisplay(IDisplay i) {
super(i);
}
@Override
public String readLine()
{
time=LocalDateTime.now();
System.out.println(format.format(time));
return super.readLine();
}

}

Basel H.



abstract public class Decorator implements IDisplay{
private IDisplay I;
public Decorator(IDisplay i) {
this.I=i;
}
@Override
public String readLine()
{
return I.readLine();
}
}

Basel H.



public class Lab_fareed {

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here

////////////////////////////////
//Part1:
IDisplay i=new BufferedReader();
i.readLine();
//////////////////////////////
//Part2
IDisplay i2=new TimeDisplay(new BufferedReader());
i2.readLine();
}

}

Basel H.



public class bufferedReader implements IDisplay{
private File file;
String s;
public bufferedReader() {
file = new File("test.txt");
s="";
}

@Override
public String readLine() {
System.out.println("nTest case: Display original Lines");
try {
readFile(new BufferedReader(new FileReader(file)));
} catch (IOException ex) {
Logger.getLogger(bufferedReader.class.getName()).log(Level.SEVERE, null, ex);
}
return s;
}
public void readFile(BufferedReader br) throws IOException {

while ((s = br.readLine()) != null)
s+="n";
br.close();
}

}