CODEWITHSUNDEEP
javaswing
James
James

Reputation: 29

Loop to Create Buttons

I need to create two classes within a larger class. One that take info from a text file in the format: String:double

String:double

...

and outputs the two variables. And a second class that takes this information and loops, creating buttons with each text entry as the label. My code so far is:

public class MainClass {
        Scanner readFile = new Scanner(new File("text.txt"));
        while (fileScanner.hasNext()) {
           String name = readFile.next();
           double value = readFile.nextDouble();
    }
    class Button {
        Button(String text. double number) {
            this.text=text;
            this.number=number;
        }
    }
}

How do I go from here?

Upvotes: 1

Views: 1971

Answers (2)

donnyton
donnyton

Reputation: 6054

@James, making buttons, while not difficult, does require a working knowledge of Java (because you also have to know how to create Frames, Panels, ActionListeners, and handle Events when your buttons are clicked--enough material to fill a textbook alone!).

If you're only interested in making some buttons in a window, the following tutorials should give you an idea of how to make a rudimentary frame with buttons:

http://download.oracle.com/javase/tutorial/uiswing/components/frame.html

http://download.oracle.com/javase/tutorial/uiswing/components/button.html

But to make it display exactly as you want it to (and using a loop!) is going to require a lot of thinking on your part.

Upvotes: 1

Bala R
Bala R

Reputation: 108937

Not an answer but here's the OP's code modified so it compiles

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

import javax.swing.JButton;

public class MainClass {
    class ScanFile {
        void Foo() throws FileNotFoundException{
            Scanner readFile = new Scanner(new File("text.txt")); // don't forget to catch FileNotFoundException!
            readFile.useDelimiter(":|\\n");
            while (readFile.hasNext()) {
               String name = readFile.next();
               double value = readFile.nextDouble();
               System.out.println(name + " " + value);
            }
        }
    }
    class Button extends JButton {
        String text;
        double number;
        Button(String text, double number) {
            super(text);
            this.text=text;
            this.number=number;
        }
    }
}

Upvotes: 1

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