Java/Apache Common/Validate

Validate: is true, not empty, no null element

import org.apache.rumons.lang.Validate;
import java.util.List;
import java.util.ArrayList;
public class ValidateExampleV1 {
  public static void main(String args[]) {
    int i = 35;
    Validate.isTrue(i > 30); // Passes ok
    // Validate.isTrue(i > 40, "Invalid value: ", i); // throws custom Exception
    List data = new ArrayList();
    // Validate.notEmpty(data, "Collection cannot be empty"); // throws custom Exception
    data.add(null);
    Validate.noNullElements(data, "Collection contains null elements"); // throws custom Exception
  }
}