boolean []无法解析为变量

Question

In the class SitoEratostenesaTest , I have:

SitoEratostenesa myObj = new SitoEratostenesa(liczby[x]);

for(i=1; i<ilosc; i++)
{
    if(tab[i])
    {
        System.out.println((i+1)+" jest liczba pierwsza");
    }
    else
    {
        System.out.println((i+1)+" jest liczba zlozona");
    }
}

boolean tab[] was created in class SitoEratostenesa . How can I use this table in my condition?

Answer 1

You need to use myObj.tab[i] to reference tab[] in you class. It has no reference with out your object.

Answer 2

Is SitoEratostenesa.tab static? If not you'll need to have a reference to an instance of SitoEratostenesa first.

Assuming that SitoEratostenesa.tab is accessible (public for example) to SitoEratostenesaTest , then the following should work:

 if(SitoEratostenesa.tab[i])

If tab isnt static, you'll need to access it by via an instance of SitoEratostenesa:

SitoEratostenesa yourInstance = ...

if(yourInstance.tab[i]) 

Answer 3

try to get the tab array from SitoEratostenesa by using myObj.getTab() and use it like myObj.getTab()[i] for example. If it is not there it might be reached directly, which is usually not a good practice, then it is called like myObj.tab[i] . If none of them are there, then you need to (if you are allowed to) make a getter method returning the tab .