Version.java

public class Version {

  private int major;
  private int minor;
  private int bugfix;

  public Version(String version) {
    int dot1 = version.indexOf('.');
    int dot2 = version.lastIndexOf('.');
    major = Integer.parseInt(version.substring(0, dot1));
    minor = Integer.parseInt(version.substring(dot1 + 1, dot2));
    bugfix = Integer.parseInt(version.substring(dot2 + 1));
  }
  ...
 }