下面列出了javax.swing.JPopupMenu#getSize ( ) 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。
public static void positionPopup(Component component, JPopupMenu jpm,
int xCoord , int yCoord) {
Dimension popupSize = jpm.getSize();
if(popupSize.width == 0)
popupSize = jpm.getPreferredSize();
Point point = new Point(xCoord + popupSize.width, yCoord + popupSize.height);
SwingUtilities.convertPointToScreen(point, component);
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
int x = 0;
int y = 0;
if(point.y > screenSize.height - 25)
y = yCoord - popupSize.height;
if(point.x > screenSize.width)
x = xCoord - popupSize.width;
jpm.show(component, x != 0 ? x : xCoord, y != 0 ? y : yCoord);
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static boolean willPopupBeContained(JPopupMenu popup, Point origin) {
if (!popup.isShowing()) {
return false;
}
Window w = SwingUtilities.windowForComponent(popup.getInvoker());
Rectangle r = new Rectangle(origin, popup.getSize());
return (w != null) && w.getBounds().contains(r);
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}
private static void runActualTest(GraphicsDevice device,
CountDownLatch latch,
JFrame frame,
boolean [] result)
{
Rectangle screenBounds = setLocation(frame, device);
JMenu menu = frame.getJMenuBar().getMenu(0);
menu.doClick();
Point location = menu.getLocationOnScreen();
JPopupMenu pm = menu.getPopupMenu();
Dimension pmSize = pm.getSize();
int yOffset = UIManager.getInt("Menu.submenuPopupOffsetY");
int height = location.y + yOffset + pmSize.height + menu.getHeight();
int available = screenBounds.y + screenBounds.height - height;
if (available > 0) {
Point origin = pm.getLocationOnScreen();
if (origin.y < location.y) {
// growing upward, wrong!
result[0] = false;
} else {
// growing downward, ok!
result[0] = true;
}
} else {
// there is no space, growing upward would be ok, so we pass
result[0] = true;
}
}