int (Rectangle visibleRect, int orientation, int direction) { int increment = super.getScrollableBlockIncrement(visibleRect, orientation, direction); // in case of scrolling list up using a single wheel rotation, the block increment is used to calculate min scroll as // currScroll - blockIncrement // the resulting y-position of visible rect never exceed min scroll // see javax.swing.plaf.basic.BasicScrollPaneUI.Handler.mouseWheelMoved -> vertical handling part -> limitScroll return adjustIncrement(visibleRect, orientation, direction, increment); }