CODEWITHSUNDEEP
javaerror-handlingjprogressbar
Niklas Büsing
Niklas Büsing

Reputation: 65

Cant access JProgressbar from button [Java]

With the windowsbuilder i've created a little gui in eclipse. And in the action event of a button ive written this code:

progressBar.setValue(0);

but that does not work. "progressBar cannot be resolved" Please Help! ps: i'm new to Java EDIT:

JButton allButton = new JButton("Klick Mich!");
    allButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent arg0) {
            progress1.setValue(50);
            main.infoBox("Hallo Welt!", "Hallo Welt!");


        }
    });

EDIT2:

JProgressBar progress1 = new JProgressBar();
    progress1.setStringPainted(true);
    progress1.setBounds(20, 124, 408, 23);
    frame.getContentPane().add(progress1);
}

EDIT3 [COMPLETE CODE] http://pastebin.com/68z1Mpen

Upvotes: 0

Views: 55

Answers (2)

m.cekiera
m.cekiera

Reputation: 5395

Make a JProgressBar progress1 a class field to access it from inner class

public class main {
    private JProgressBar progress1;
    private JFrame frame;
...
}

and declare it by:

progress1 = new JProgressBar();

or make JProgressBar progress1 final.

Upvotes: 0

Madhawa Priyashantha
Madhawa Priyashantha

Reputation: 9900

you have created jprogressbar after you access it.you have to create before access

like this

JProgressBar progress1 = new JProgressBar();
JButton allButton = new JButton("Klick Mich!");
allButton.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent arg0) {
        progress1.setValue(50);
        main.infoBox("Hallo Welt!", "Hallo Welt!");    
    }
});

when you call

progress1.setValue(50);

progress1 isn't declared .so that's why you are getting a error

Upvotes: 1

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