void input method

I need to create an input method that is void and call it from the main method.

Code:

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        public  void  input()
        {
               
                age=Integer.parseInt(JOptionPane.showInputDialog("Enter your age"));
                name=JOptionPane.showInputDialog("Enter your name");       
                setAge(age);
                setName(name);
               
        }

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Then I'd like to instantiate an object in a loop such as

Code:

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for (int i=0; i<l.length; i++) //loops through the array
                {
                l[i].input();
                name=l[i].getName();
                age=l[i].getAge();
                l[i]=new Listing(name,age);
                }

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Quote:

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Originally Posted by mwimpelberg

I need to create an input method that is void and call it from the main method....

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OK, so what have you tried so far, and where are you stuck?

Quote:

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Originally Posted by Fubarable

OK, so what have you tried so far, and where are you stuck?

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I tried the input method which just prints out the dialog box. From there, in my floor loop I'd like to have a new object Listing(name,age). So in my input method, I'd like to use my setAge() and setName() which return an int and String respectively

OK, I think I may be partly understanding what you're trying to do. Please clarify or correct if I'm wrong:

• Create a Listing class.
• Create an input method in this class that fills the fields of the current object of this class.
• In the main method, create an array of objects of this class.
• In the main method loop through this array using a for loop, calling the input method on each instance held in the array.

If I'm right, your for loop will not need to call l[i].getName(), or any other get methods. All it needs to do is instantiate objects of this class if not yet done so by calling new Listing(), call the input method on this instance created in the loop.

You are correct and this is what I tried

Code:

---

       
                for (int i=0; i<l.length; i++) //loops through the array
                {
                l[i].input();
                name=l[i].getName();
                age=l[i].getAge();
                l[i]=new Listing(Listing.input());
                }

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And what happens when you try this?

Quote:

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Originally Posted by mwimpelberg

You are correct and this is what I tried

Code:

---

       
                for (int i=0; i<l.length; i++) //loops through the array
                {
                l[i].input();
                name=l[i].getName();
                age=l[i].getAge();
                l[i]=new Listing(Listing.input());
                }

---

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Cannot make a static reference to the non-static method input() from the type Listing

Exactly, you're calling the input() method on the Listing *class* which doesn't make sense and is completely unnecessary. Also, as I stated earlier, getName() and getAge() has no place inside your for loop. What purpose does it serve? It does nothing useful. Instead and again, do as I suggest early. In pseudocode:

Code:

---

for (int i = 0; i < .length; i++)
{
  // create a new Listing object and assign it to l[i]
  // call the input method on this object (not on the class)
  // and that's it!
}

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I now have in the listing class

Code:

---

        public  void  input()
        {
               
                age=Integer.parseInt(JOptionPane.showInputDialog("Enter your age"));
                name=JOptionPane.showInputDialog("Enter your name");       
                       
        }

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then in the main method

Code:

---

                       
                for (int i=0; i<l.length; i++) //loops through the array
                {
                l[i].input();
                }

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Quote:

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Originally Posted by Fubarable

Exactly, you're calling the input() method on the Listing *class* which doesn't make sense and is completely unnecessary. Also, as I stated earlier, getName() and getAge() has no place inside your for loop. What purpose does it serve? It does nothing useful. Instead and again, do as I suggest early. In pseudocode:

Code:

---

for (int i = 0; i < .length; i++)
{
  // create a new Listing object and assign it to l[i]
  // call the input method on this object (not on the class)
  // and that's it!
}

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And everything works? If so, congrats!