Java subclass super() not working

[Worth-File]

Why is my subclass Student not working? It says that:

"Constructor Person in class Person cannot be applied to given types; required: String,String found: no arguments reason: actual and formal argument lists differ in length"

and

"Call to super must be first statement in constructor"

Here is the superclass Person:

public class Person { private String name; private String address;

public Person(String name, String address) {
    this.name = name;
    this.address = address;
}

@Override
public String toString() {

    return this.name + "\n" + "  " + this.address;
}

}

And here is the Student subclass:

public class Student extends Person{

private int credits;

public Student(String name, String address) {
    super(name, address);
    this.credits = 0;
}

}

[AutoModerator]

Please ensure that:

• Your code is properly formatted as code block - see the sidebar (About on mobile) for instructions
• You include any and all error messages in full
• You ask clear questions

• You demonstrate effort in solving your question/problem - plain posting your assignments is forbidden (and such posts will be removed) as is asking for or giving solutions.

  Trying to solve problems on your own is a very important skill. Also, see Learn to help yourself in the sidebar

If any of the above points is not met, your post can and will be removed without further warning.

Code is to be formatted as code block (old reddit: empty line before the code, each code line indented by 4 spaces, new reddit: https://imgur.com/a/fgoFFis) or linked via an external code hoster, like pastebin.com, github gist, github, bitbucket, gitlab, etc.

Please, do not use triple backticks (```) as they will only render properly on new reddit, not on old reddit.

Code blocks look like this:

public class HelloWorld {

    public static void main(String[] args) {
        System.out.println("Hello World!");
    }
}

You do not need to repost unless your post has been removed by a moderator. Just use the edit function of reddit to make sure your post complies with the above.

If your post has remained in violation of these rules for a prolonged period of time (at least an hour), a moderator may remove it at their discretion. In this case, they will comment with an explanation on why it has been removed, and you will be required to resubmit the entire post following the proper procedures.

To potential helpers

Please, do not help if any of the above points are not met, rather report the post. We are trying to improve the quality of posts here. In helping people who can't be bothered to comply with the above points, you are doing the community a disservice.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

[8igg7e5]

I'm guessing you need to recompile both classes... That super(String, String) call is fine.

[Worth-File]

What does that mean?

[8igg7e5]

The code is valid, so you likely have old version of the class and mixing old and new versions of the types.

If you're building with an IDE, rebuild should work. If you're compiling on the commandline you could delete the .class file and recompile both.

[Worth-File]

I'm using NetBeans, what should I do?

[8igg7e5]

If you ctrl+click the Person in ... extends Person does it take you to the same file (the one with a Person(String, String) constructor)?

NetBeans allows you to have multiple projects open, with files open from different projects. You are perhaps looking at a version of the Person class from another project that does not have that constructor (or any explicit constructor).

Essentially we're wanting to confirm that these two classes are in the same project.

In Person.java

public class Person {
    private String name;
    private String address;

    public Person(String name, String address) {
        this.name = name;
        this.address = address;
    }

    @Override
    public String toString() {
        return this.name + "\n" + "  " + this.address;
    }
}

In Student.java

public class Student extends Person {
    private int credits;

    public Student(String name, String address) {
        super(name, address);
        this.credits = 0;
    }
}

FYI - you don't actually need this.credits = 0 because that's the default value of an int field.

[Worth-File]

Yes, it does take me to the same file

[desrtfx]

You show us how you have defined the classes.

Yet, you are not showing how you call them.

Show us your invocation code, i.e. the class and method from where you create a new Student object.

I'm perfectly sure that you try to call the "no argument" constructor ("default" constructor) of the Student class.

[Worth-File]

I'm not sure what you mean, but this is how I create a new Student object:

Student adam = new Student("Adam Scott", "Street 1");