CODEWITHSUNDEEP
javaclasspublic
Srimanth
Srimanth

Reputation: 1052

Object is not able to access the method defined as public

Here is another dumb question from me.I just read that if you define any method with "public" access , you can use that method in any other class if both the classes are in the same package. I tried that in Eclipse but it is not working. here is my code

first class in package "nameless"

package nameless;

public class Practice {
    public static int number;
    public String name;

    public int Setnumber(int a){
        number=a;
        return number;
    }

    public String Setname(String s){
        name=s;
        return name;
    }

    public static void main(String[] args){
        int num;
        String nam;
        Practice obj= new Practice();
        num=obj.Setnumber(797);
        nam=obj.Setname("Srimanth");

        System.out.println("The number and name are"+ num+" "+nam);
    }
}

So in the above code Setname is defined as public. here is another code in same package

package nameless;

public class Mainclass{
    public static void main(String args[]){
        Mainclass obj= new Mainclass();
        obj.Setname("Srimanth");    
    }
}

The above program giving me error saying "The method Setname(String) is undefined for the type Mainclass".

help me out please.

Note:I am new to java programming. explain your answers in detail. thank you.

Upvotes: 0

Views: 620

Answers (6)

Anastasis
Anastasis

Reputation: 192

You can also do this:

public class Mainclass extends Practice {
    public static void main(String args[]){
        Mainclass obj= new Mainclass();
        obj.Setname("Srimanth");
    }
}

if you use the keyword extends ,the object from class Mainclass inherits the methods from Practice class.

Upvotes: 0

Gumbo
Gumbo

Reputation: 1746

Your Mainclass has no method setName(). You would have to write

 Practice p = new Practice();
 p.setName("Srimanth");

Upvotes: 0

Luiggi Mendoza
Luiggi Mendoza

Reputation: 85779

The error message is pretty clear: The method Setname(String) is undefined for the type Mainclass it means that Mainclass class does not have a method with name SetName. Just define a method in Mainclass with that name, or use Practice class instead.

Defining the visibility for a method (access modifier) as public doesn't allow you to access the method from other objects which are not in the appropriate class hierarchy. You must have an instance of the same class or sub class to access that.

Upvotes: 3

Suresh Atta
Suresh Atta

Reputation: 121998

You won't get an Apple from Orange Tree.

Mainclass doesn't have the method you are calling. Only Practice class have that method. Please define a one in Mainclass as well to access it.

Note: Though it is legal ,returning from a setter is not a good practice.

Upvotes: 0

Deepanshu J bedi
Deepanshu J bedi

Reputation: 1530

Mainclass class does not have a method with name SetName so the error The method Setname(String) is undefined for the type Mainclass".

Upvotes: 1

Thusitha Thilina Dayaratne
Thusitha Thilina Dayaratne

Reputation: 5712

In Mainclass there is no method named Setname. So you can't access non exist method. If you want to access the Setname method you must have an instance from Practice class

Upvotes: 1

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