question: protected boolean drawLeftBorder ( Component c , Graphics g , int x , int y , int width , int height ) { if ( super . drawLeftBorder ( c , g , x , y , width , height ) && frame . isResizable ( ) ) { g . setColor ( getFrameHighlight ( ) ) ; int topY = y + CORNER_SIZE ; g . drawLine ( x , topY , x + 4 , topY ) ; int bottomY = height - CORNER_SIZE ; g . drawLine ( x + 1 , bottomY , x + 5 , bottomY ) ; g . setColor ( getFrameShadow ( ) ) ; g . drawLine ( x + 1 , topY - 1 , x + 5 , topY - 1 ) ; g . drawLine ( x + 1 , bottomY - 1 , x + 5 , bottomY - 1 ) ; return true ; } return false ; }
target:  Draws the InternalFrameBorder's left border.