Something

public class TempMonitor {    float currentTemp;    public void setTemp(float newTemp) {        currentTemp = newTemp;    }}public class MyTempMonitor extends TempMonitor {    public void setTemp(float newTemp, MyLoggerClass logger) {        logger.log(currentTemp, newTemp); // Do something external with the temps        setTemp(newTemp) // Call the original method to set the temp    }}