I have two classes in my main class(lets call them classA and classB).
Is there any chance to set classA variables within classB?
Something like that:
class classB {
int indexB;
classB() {
indexB = 0;
classA.index = indexB;
}
}
thank you very much! greetings
Yes, you can directly assign public variables of classA as you did in your snippet, or declare a setter for private variables.-
classA
public setIndex(int index) {
this.index = index;
}
classB
classAInstance.setIndex(indexB);
Yes, it is possible. Assuming index of the class classA is also package protected and classA is in the same package as classB then you can do something like that:
class classA {
int index;
classA() {}
// OR
classA(int index) {
this.index = index;
}
}
class classB {
int indexB;
classA classA;
classB() {
indexB = 0;
classA = new classA();
classA.index = indexB;
// OR
classA = new classA(indexB);
}
}
If both classes are in different packages you then you need a public setter for index in classA as demonstrated by ssantos (The second method I've shown, using the constructor, will work in this case too it the constructor is public).
It is however not very good to access members of other classes directly. Please use getters and setters for that, also please consider the java naming conventions: class should start with an uppercase letter, thus ClassA and ClassB.
The index has to be a static variable of class A.Then you can do this.
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