public void unread ( ) throws IOException { mPushback ++ ; if ( mPushback > mMaxPushback - 2 ) { throw new IOException ( this . getClass ( ) . getName ( ) + ": pushback exceeded " + ( mMaxPushback - 2 ) ) ; } if ( ( -- mCursor ) < 0 ) mCursor += mMaxPushback ; if ( mCursor > 0 ) { mPosition = mPositions [ mCursor - 1 ] ; } else { mPosition = mPositions [ mMaxPushback - 1 ] ; } unreadHook ( mCharacters [ mCursor ] ) ; }
Unread the last character read .