thi is what i have so I don'y know whether I should write my calculating method in my classes that implements my interface and should I write my calculation method coz that is the only problem that is holding me back??
[code]
public abstract class Measurement
{
private int value;
protected String symbol;

/**
*Measurement's two argument construtor
*@ param integer value and protected string.
*/
public Measurement(int v, String s)
{
value = v;
symbol = s;
}
//set the value.
public void setValue(int v)
{
value = v;
}
/**
*method getValue
*@ return Returns an integer.
*/
public int getValue()
{
return value;
}
//set symbol.
public void setSymbol( String s)
{
symbol = s;
}
/**
*method getsymbol
*@ return Returns a string.
*/
protected String getSymbol()
{
return symbol;
}
//returns objects to measurement
public String toString()
{
return String.format("Measurement:",getValue(),getSymbol());
}
public abstract int isThermal();


}
==============================
public interface ImperialConvertable
{
int getConvertToF();
}
========================
public interface MetricConvertable
{
int getConvertTok();
}
========================================
public class Celsius implements ImperialConvertable
{

}
============================
public class fahrenheit implements ImperialConvertable
{

}
======================
public class Delisle implements ImperialConvertable
{

}
==============================
here is my question below