How to fetch path of a file from preference page and print the Output on console via Button on Workbench?

Question

I have made one preference page whose programming is:

public class SAML
extends FieldEditorPreferencePage
implements IWorkbenchPreferencePage {

public SAML(         


        

Answer 1

You need two parts:

• Code that initialize the default for the preference
• Code that use the current value

To set the default, you use the following code in the Activator:

public class Activator extends AbstractUIPlugin {
    @Override
    public void start(BundleContext context) throws Exception {
        super.start(context);
        IPreferenceStore ps = getPreferenceStore();
        ps.setDefault(SHOW_IMAGE, true);
    }
    public static final String SHOW_IMAGE = "showImage";
}

Alternatively, you can use the org.eclipse.core.runtime.preferences extension point...

Note that the code above assume that the type of the preference is Boolean - there are other methods for numbers, strings, etc... A file name is a string.

To use the current value, just use

if (Activator.getDefault().getPreferenceStore().getBoolean(Activator.SHOW_IMAGE)) {
    …
}

The following slides contains a little more information...