A "non-static method cannot be referenced from a static context" error appears, unsure

Question

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What is the reason behind “non-static method cannot be referenced from a static context”?

public void Sort(){
*some code*
}
public void displayResults()
  {*more code*
}

public static void main(String[] args)
{
Sort();
displayResults();
}

Why am I getting this error? I have sort(); in another abstract class and then this class here is extending it.

-Confused

Good work trying to make a minimal example, but you forgot the containing class :) — ObscureRobot, Oct 22 '11 at 19:50

score 2 · Accepted Answer · answered Oct 22 '11 at 19:45

2

You need to instantiate the class that contains Sort(), displayResults() and main before you can call Sort() or displayResults() from main().

class Example {
    public void Sort(){
        // *some code*
    }
    public void displayResults()
    {
        // *more code*
    }
    public static void main(String[] args)
    {
        Example ex = new Example()
        ex.Sort();
        ex.displayResults();
    }
}

answered Oct 22 '11 at 19:45

ObscureRobot

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Danke! That solved my problem. – jackie Oct 22 '11 at 19:53

score 0 · Answer 2 · answered Oct 22 '11 at 19:46

You need an instance of a class to call a non-static method. Calling from a static method, you don't have an instance, as statics are associated to a class, not to an instance. Therefore, you are not allowed to call non-static methods or access non-static variables from inside a static context.

A "non-static method cannot be referenced from a static context" error appears, unsure

2 Answers2