Say I have the Class Sheep and the 2 parameters 'speed' and 'rotation'. Speed is optional, rotation is not. How do I use Constructor Overloading to avoid nulling? I can't really get it to work.
xbLank wrote ...
2017/12/27
Constructor Overloading
#Solved
I forgot to assign the devault value and java did not like that at all.
public class Sheep extends Actor
{
private int speed,rot;
public Sheep(int rotation)
{
rot = rotation;
speed = 0 //default value
}
public Sheep(int rotation,int sheepSpeed)
{
this(rotation);
speed = sheepSpeed;
}
}
You could doubly overload the constructor as follows:
By the way, all primitive type fields are automatically given a default value ('false' for booleans and '0' for all others); so, whatever the issue was, it was not what you purported here:
It must have trying to tell you something else.
public Sheep()
{
this(0, 0);
}
public Sheep(int rotation)
{
this(rotation, 0);
}
public Sheep(int rotation, int sheepSpeed)
{
rot = rotation;
speed = sheepSpeed;
}일리아스 wrote...
I forgot to assign the devault value and java did not like that at all. As I mentioned: There only is one optional parameter. I dont see a point in double overloading.
#Solved
I forgot to assign the devault value and java did not like that at all.
The following compiles just fine for me:
import greenfoot.*;
public class Sheep extends Actor
{
private int speed,rot;
public Sheep(int rotation)
{
rot = rotation;
}
public Sheep(int rotation,int sheepSpeed)
{
this(rotation);
speed = sheepSpeed;
}
}
You need to login to post a reply.