Question

My code is the following:

package org.minuteware.jgun;

import org.apache.commons.configuration.*;

class ConfigReader {
    public void getconfig() {
        Configuration config;
        try {
            config = new PropertiesConfiguration("gun.conf");
        } catch (ConfigurationException e) {
            e.printStackTrace();
        }
        String day = config.getString("sync_overlays");
        System.out.println(day);
    }
}

Eclipse has two problems with this code:

1. For the package org.minuteware.jgun; line it says The type org.apache.commons.lang.exception.NestableException cannot be resolved. It is indirectly referenced from required .class files
2. For the line } catch (ConfigurationException e) { it says No exception of type ConfigurationException can be thrown; an exception type must be a subclass of Throwable

I’ve found ConfigurationException in Java?, but the solution provided there does not help.

Answer 1

The core of Apache Commons Configuration has the following runtime dependencies:

• Apache Commons Lang (version 2.2, 2.3, 2.4, 2.5 or 2.6)
• Apache Commons Collections (version 3.1, 3.2 or 3.2.1)
• Apache Commons Logging (version 1.0.4, 1.1 or 1.1.1)

Put them in your classpath as well. Your particular problem is caused by a missing Lang dependency.