public class Test(){
public List makeList(){
//some code
....
double density = mass / vol;
return mylist;
}
}
How can I refer to density even though I only returned a list? In Python, I can call self.density
I know I can create another class Pair<List, Double> but I would rather not do that due to clutter.
In Python, I can call self.density
No, this is not the same. What yo have defined in your code is a local variable - its scope is limited to makeList().
If you want to refer to it from other methods, you can make it an instance variable (this is what you do with self in Python):
public class Test {
private double density = 0.0;
public List makeList(){
//some code
....
density = mass / vol;
return mylist;
}
}
public class Test() too (as Manuel pointed out).
Make density an instance member of your Test class.
public class Test { // NO open/close parenthesis here!
private double density;
public List makeList() {
//some code
....
this.density = mass / vol;
return mylist;
}
public double getDensity() {
return this.density;
}
}
Then call:
Test test = new Test();
List myList = test.makeList();
double density = test.getDensity();
You need to declare density as a member of the class Test outside the method and merely assign it within the method. If it is declared within the method, it can't be accessed elsewhere.
Like so:
public class Test{
private double density;
public List makeList(){
//some code
....
density = mass / vol;
return mylist;
}
}
self.density". No you can't, not unless it's a member of the objectTest.