这是我使用的实用程序类。可用于滚动到的顶部，底部，左侧，右侧或水平/垂直中心
JScrollPane。
public final class ScrollUtil { public static final int NONE = 0, TOP = 1, VCENTER = 2, BOTTOM = 4, LEFT = 8, HCENTER = 16, RIGHT = 32; private static final int OFFSET = 100; // Required for hack (see below). private ScrollUtil() { } public static void scroll(JComponent c, int part) { scroll(c, part & (LEFT|HCENTER|RIGHT), part & (TOP|VCENTER|BOTTOM)); } public static void scroll(JComponent c, int horizontal, int vertical) { Rectangle visible = c.getVisibleRect(); Rectangle bounds = c.getBounds(); switch (vertical) { case TOP: visible.y = 0; break; case VCENTER: visible.y = (bounds.height - visible.height) / 2; break; case BOTTOM: visible.y = bounds.height - visible.height + OFFSET; break; } switch (horizontal) { case LEFT: visible.x = 0; break; case HCENTER: visible.x = (bounds.width - visible.width) / 2; break; case RIGHT: visible.x = bounds.width - visible.width + OFFSET; break; } // When scrolling to bottom or right of viewport, add an OFFSET value. // This is because without this certain components (e.g. JTable) would // not scroll right to the bottom (presumably the bounds calculation // doesn't take the table header into account. It doesn't matter if // OFFSET is a huge value (e.g. 10000) - the scrollRectToVisible method // still works correctly. c.scrollRectToVisible(visible); }}
