BorderLayout has the following 4 constants which indicate component orientation relative positioning:

public static final String BEFORE_FIRST_LINE
public static final String AFTER_LAST_LINE
public static final String BEFORE_LINE_BEGINS
public static final String AFTER_LINE_ENDS

These constants were introduced to the API by IBM before Sun took over this project. Unfortunately, the constant's names are inconsistent with the terminology used elsewhere in AWT and Swing for this same idea. The names used everwhere else are:

  PAGE_START
  PAGE_END
  LINE_START
  LINE_END

BorderLayout should add 4 new constants which are synonyms for the old ones and which use the correct terminology like this:

public static final String PAGE_START = BEFORE_FIRST_LINE
public static final String PAGE_END = AFTER_LAST_LINE
public static final String LINE_START = BEFORE_LINE_BEGINS
public static final String LINE_END = AFTER_LINE_ENDS