java, extending class with the constructor of main class has parameter

user_79770 0
Viewed 109595

hei. the language is java. i want to extend this class which the constructor has parameters.

this is the main class

public class CAnimatedSprite {
     public CAnimatedSprite(String pFn, int pWidth, int pHeight) {
     }
}

this is the child class

public class CMainCharacter extends CAnimatedSprite {

    //public void CMainCharacter:CAnimatedSprite(String pFn, int pWidth, int pHeight) {
    //}
}

how do i write the correct syntax? and the error is "constructor cannot be applied to given types"

java
3 Answers

You can define any arguments you need for your constructor, but it is necessary to call one constructor of the super class as the first line of your own constructor. This can be done using super() or super(arguments).

public class CMainCharacter extends CAnimatedSprite {

    public CMainCharacter() {
        super("your pFn value here", 0, 0);
        //do whatever you want to do in your constructor here
    }

    public CMainCharacter(String pFn, int pWidth, int pHeight) {
        super(pFn, pWidth, pHeight);
        //do whatever you want to do in your constructor here
    }

}
user_35870

The first statement of your constructor must be a call to superclass constructor. The syntax is:

super(pFn, pWidth, pHeight);

It is up to you to decide, whether you want constructor of your class to have same parameters and just pass them to superclass constructor:

public CMainCharacter(String pFn, int pWidth, int pHeight) {
    super(pFn, pWidth, pHeight);
}

or pass something else, like:

public CMainCharacter() {
    super("", 7, 11);
}

And don't specify return type for constructors. It's illegal.

user_1136620 
public class CAnimatedSprite {
     public CAnimatedSprite(String pFn, int pWidth, int pHeight) {
     }
}


public class CMainCharacter extends CAnimatedSprite {

    // If you want your second constructor to have the same args
    public CMainCharacter(String pFn, int pWidth, int pHeight) {
        super(pFn, pWidth, pHeight);
    }
}
user_2344990
Related