Java Tutorial/I18N/ChoiceFormat

Choice Format

import java.text.ChoiceFormat;
public class ChoiceFormatApp {
  public static void main(String args[]) {
    double limits[] = { 0.0, 0.1, 0.3, 0.7 };
    String labels[] = { "very low", "low", "moderate", "high" };
    ChoiceFormat format = new ChoiceFormat(limits, labels);
    double r = Math.random();
    
    System.out.println(format.format(r) + " (" + r + ").");
  }
}
//high (0.755370803805559).

Get the smallest double greater than d

import java.text.ChoiceFormat;
public class Main {
  public static void main(String[] argv) throws Exception {
    double d = 1.2;
    double d2 = ChoiceFormat.nextDouble(d);
    System.out.println(d2);
  }
}
//1.2000000000000002

Implementing a Simple Event Notifier

import java.util.Observable;
import java.util.Observer;
class MyModel extends Observable {
  public synchronized void setChanged() {
    super.setChanged();
  }
}
public class Main {
  public static void main(String[] argv) throws Exception {
    MyModel model = new MyModel();
    model.addObserver(new Observer() {
      public void update(Observable o, Object arg) {
      }
    });
    model.setChanged();
    Object arg = "new information";
    model.notifyObservers(arg);
  }
}

Incrementing a Double by the Smallest Possible Amount

import java.text.ChoiceFormat;
public class Main {
  public static void main(String[] argv) throws Exception {
    double d = 1.2;
    // Get the largest double less than d
    double d1 = ChoiceFormat.previousDouble(d);
    System.out.println(d1);
  }
}
//1.1999999999999997