Why stop at highlighting? The syntax should be customizable also. Who needs to repeat the `protected` keyword, initial null value, or semicolons before the line ends? Perhaps instead of...

  protected HashMap children = new HashMap();
  protected int backgroundProcessorDelay = -1;
  protected LifecycleSupport lifecycle = new LifecycleSupport(this);
  protected ArrayList listeners = new ArrayList();
  protected Loader loader = null;
  protected Log logger = null;
  protected String logName = null;
  protected Manager manager = null;
  protected Cluster cluster = null;
  protected String humanReadableName = null;
  protected Container parent = null;
  protected ClassLoader parentClassLoader = null;

...we could write...

  protected(defaultInitialValue: null){
    HashMap children = new HashMap()
    int backgroundProcessorDelay = -1
    LifecycleSupport lifecycle = new LifecycleSupport(this)
    ArrayList listeners = new ArrayList()
    Loader loader
    Log logger
    String logName
    Manager manager
    Cluster cluster
    String humanReadableName
    Container parent
    ClassLoader parentClassLoader
  }

And that's just for starters!