How do you get the screen width in java?

Question

Does anyone know how you would get the screen width in java? I read something about some toolkit method but I\'m not quite sure what that is.

Thanks, Andrew

Answer 1

java.awt.Toolkit.getDefaultToolkit().getScreenSize()

Answer 2

The OP probably wanted something like this:

Dimension screenSize = java.awt.Toolkit.getDefaultToolkit().getScreenSize();

Answer 3

This is an improvement to the multi-monitor solution posted (above) by Lawrence Dol. As in his solution, this code accounts for multiple monitors and task-bar insets. The included functions are: getScreenInsets(), getScreenWorkingArea(), and getScreenTotalArea().

Changes from the Lawrence Dol version:

• This avoids getting the graphics configuration twice.
• Added a function for getting the total screen area.
• Renamed the variables for clarity.
• Added Javadocs.

Code:

/**
 * getScreenInsets, This returns the insets of the screen, which are defined by any task bars
 * that have been set up by the user. This function accounts for multi-monitor setups. If a
 * window is supplied, then the the monitor that contains the window will be used. If a window
 * is not supplied, then the primary monitor will be used.
 */
static public Insets getScreenInsets(Window windowOrNull) {
    Insets insets;
    if (windowOrNull == null) {
        insets = Toolkit.getDefaultToolkit().getScreenInsets(GraphicsEnvironment
                .getLocalGraphicsEnvironment().getDefaultScreenDevice()
                .getDefaultConfiguration());
    } else {
        insets = windowOrNull.getToolkit().getScreenInsets(
                windowOrNull.getGraphicsConfiguration());
    }
    return insets;
}

/**
 * getScreenWorkingArea, This returns the working area of the screen. (The working area excludes
 * any task bars.) This function accounts for multi-monitor setups. If a window is supplied,
 * then the the monitor that contains the window will be used. If a window is not supplied, then
 * the primary monitor will be used.
 */
static public Rectangle getScreenWorkingArea(Window windowOrNull) {
    Insets insets;
    Rectangle bounds;
    if (windowOrNull == null) {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        insets = Toolkit.getDefaultToolkit().getScreenInsets(ge.getDefaultScreenDevice()
                .getDefaultConfiguration());
        bounds = ge.getDefaultScreenDevice().getDefaultConfiguration().getBounds();
    } else {
        GraphicsConfiguration gc = windowOrNull.getGraphicsConfiguration();
        insets = windowOrNull.getToolkit().getScreenInsets(gc);
        bounds = gc.getBounds();
    }
    bounds.x += insets.left;
    bounds.y += insets.top;
    bounds.width -= (insets.left + insets.right);
    bounds.height -= (insets.top + insets.bottom);
    return bounds;
}

/**
 * getScreenTotalArea, This returns the total area of the screen. (The total area includes any
 * task bars.) This function accounts for multi-monitor setups. If a window is supplied, then
 * the the monitor that contains the window will be used. If a window is not supplied, then the
 * primary monitor will be used.
 */
static public Rectangle getScreenTotalArea(Window windowOrNull) {
    Rectangle bounds;
    if (windowOrNull == null) {
        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        bounds = ge.getDefaultScreenDevice().getDefaultConfiguration().getBounds();
    } else {
        GraphicsConfiguration gc = windowOrNull.getGraphicsConfiguration();
        bounds = gc.getBounds();
    }
    return bounds;
}

Answer 4

Toolkit.getDefaultToolkit().getScreenSize().getWidth()

Answer 5

A good way of detecting whether or not something is within visual bounds, is using

Screen.getScreensForRectangle(x, y, width, height).isEmpty();

Answer 6

The following code should do it (haven't tried it):

GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
gd.getDefaultConfiguration().getBounds().getWidth();

edit:

For multiple monitors you should use the following code (taken from the javadoc of java.awt.GraphicsConfiguration:

  Rectangle virtualBounds = new Rectangle();
  GraphicsEnvironment ge = GraphicsEnvironment.
          getLocalGraphicsEnvironment();
  GraphicsDevice[] gs =
          ge.getScreenDevices();
  for (int j = 0; j < gs.length; j++) { 
      GraphicsDevice gd = gs[j];
      GraphicsConfiguration[] gc =
          gd.getConfigurations();
      for (int i=0; i < gc.length; i++) {
          virtualBounds =
              virtualBounds.union(gc[i].getBounds());
      }
  }