How do I call a method into the public static class to be used? [duplicate]

Question

I am new coder taking a class over computer science. We are working with Java. The assignment was given through a pdf that I reuploaded as a photo here https://i.sstatic.net/xNEdm.png. Here is my code so far.

public class LineEditor { private String myLine; public void insert(String str, int index) { String newmyLine = myLine; newmyLine = " world!"; String sub = myLine.substring(0, index); String sub2 = myLine.substring(index, myLine.length()-1); System.out.print(sub + str + sub2); } } public void delete(String str) { } public void deleteAll(String str) { } public static void main(String[] aghs){ insert("Hello ", 0); } }

When I run this, I get the error: Cannot make a static reference to the non-static method insert(java.lang.String, int) from the type LineEditor

How can I take the insert method and use it in the main method? If any of my terminology is off, go ahead and tell me as well.

Make insert static

BitNinja
– BitNinja

2014-09-26 02:49:31 +00:00
Commented Sep 26, 2014 at 2:49 — BitNinja
– BitNinja, Commented Sep 26, 2014 at 2:49

rickythefox · Accepted Answer · 2014-09-26 02:53:51Z

main is a static method. You need to create an instance of your class with new and then call insert on it.

Eg:

public static void main(String[] aghs){ LineEditor le = new LineEditor(); le.insert("Hello ", 0); }

The other option you have it to make method static, but having classes with a bunch of static methods can be a sign of bad object-oriented design. Of course this depends on the problem at hand.

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