...
import java.util.Locale;
import java.util.ResourceBundle;
public class ResourceBundleDemo {
public static void main(String[] args) {
// create a new ResourceBundle with specified locale
ResourceBundle bundle = ResourceBundle.getBundle("hello", Locale.US);
// print the text assigned to key "hello"
System.out.println("" + bundle.getString("hello"));
// check if the bundle contains "bye" key
System.out.println("" + bundle.containsKey("bye"));
// check if the bundle contains "hello" key
System.out.println("" + bundle.containsKey("hello"));
}
}