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如何在java中获得屏幕分辨率？

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如何以像素为单位获得屏幕分辨率（宽x高）？

我正在使用JFrame和java swing方法 .

java swing screen resolution

10 回答

  • 1

    此调用将为您提供所需的信息 .

    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
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  • 3

    您可以使用 Toolkit.getScreenSize() 方法获取屏幕大小 .

    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
double width = screenSize.getWidth();
double height = screenSize.getHeight();

    在多显示器配置上，您应该使用：

    GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
int width = gd.getDisplayMode().getWidth();
int height = gd.getDisplayMode().getHeight();

    如果你想在DPI中获得屏幕分辨率，你必须在 Toolkit 上使用 getScreenResolution() 方法 .

    Resources :

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  • 1

    此代码将枚举系统上的图形设备（如果安装了多个监视器），并且您可以使用该信息来确定监视器关联或自动放置（某些系统在应用程序运行时使用一个小侧监视器进行实时显示背景，这样的监视器可以通过大小，屏幕颜色等来识别 . ）：

    // Test if each monitor will support my app's window
// Iterate through each monitor and see what size each is
GraphicsEnvironment ge      = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[]    gs      = ge.getScreenDevices();
Dimension           mySize  = new Dimension(myWidth, myHeight);
Dimension           maxSize = new Dimension(minRequiredWidth, minRequiredHeight);
for (int i = 0; i < gs.length; i++)
{
    DisplayMode dm = gs[i].getDisplayMode();
    if (dm.getWidth() > maxSize.getWidth() && dm.getHeight() > maxSize.getHeight())
    {   // Update the max size found on this monitor
        maxSize.setSize(dm.getWidth(), dm.getHeight());
    }

    // Do test if it will work here
}
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  • 3

    这是当前分配给定组件的屏幕分辨率（类似于根窗口的大部分部分在该屏幕上可见） .

    public Rectangle getCurrentScreenBounds(Component component) {
    return component.getGraphicsConfiguration().getBounds();
}

    用法：

    Rectangle currentScreen = getCurrentScreenBounds(frameOrWhateverComponent);
int currentScreenWidth = currentScreen.width // current screen width
int currentScreenHeight = currentScreen.height // current screen height
// absolute coordinate of current screen > 0 if left of this screen are further screens
int xOfCurrentScreen = currentScreen.x

    如果你想尊重工具栏等，你也需要用这个来计算：

    GraphicsConfiguration gc = component.getGraphicsConfiguration();
Insets screenInsets = Toolkit.getDefaultToolkit().getScreenInsets(gc);
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  • 11

    这是一些功能代码（Java 8），它返回最右边屏幕最右边的x位置 . 如果没有找到屏幕，则返回0 .

    GraphicsDevice devices[];

  devices = GraphicsEnvironment.
     getLocalGraphicsEnvironment().
     getScreenDevices();

  return Stream.
     of(devices).
     map(GraphicsDevice::getDefaultConfiguration).
     map(GraphicsConfiguration::getBounds).
     mapToInt(bounds -> bounds.x + bounds.width).
     max().
     orElse(0);

    以下是JavaDoc的链接 .

    GraphicsEnvironment.getLocalGraphicsEnvironment()
    GraphicsEnvironment.getScreenDevices()
    GraphicsDevice.getDefaultConfiguration()
    GraphicsConfiguration.getBounds()

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  • 1
    int resolution =Toolkit.getDefaultToolkit().getScreenResolution();

System.out.println(resolution);
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  • 1
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
double width = screenSize.getWidth();
double height = screenSize.getHeight();
framemain.setSize((int)width,(int)height);
framemain.setResizable(true);
framemain.setExtendedState(JFrame.MAXIMIZED_BOTH);
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  • 0

    这三个函数以Java格式返回屏幕大小 . 此代码考虑了多显示器设置和任务栏 . 包含的函数是： getScreenInsets() ， getScreenWorkingArea() 和 getScreenTotalArea() .

    码：

    /**
 * 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;
}
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  • 15

    这是我经常使用的代码片段 . 它返回完整的可用屏幕区域（即使在多显示器设置上），同时保留原生显示器位置 .

    public static Rectangle getMaximumScreenBounds() {
    int minx=0, miny=0, maxx=0, maxy=0;
    GraphicsEnvironment environment = GraphicsEnvironment.getLocalGraphicsEnvironment();
    for(GraphicsDevice device : environment.getScreenDevices()){
        Rectangle bounds = device.getDefaultConfiguration().getBounds();
        minx = Math.min(minx, bounds.x);
        miny = Math.min(miny, bounds.y);
        maxx = Math.max(maxx,  bounds.x+bounds.width);
        maxy = Math.max(maxy, bounds.y+bounds.height);
    }
    return new Rectangle(minx, miny, maxx-minx, maxy-miny);
}

    在具有两个全高清显示器的计算机上，其中左侧设置为主显示器（在Windows设置中），该功能返回

    java.awt.Rectangle[x=0,y=0,width=3840,height=1080]

    在相同的设置上，但将右侧监视器设置为主监视器，该函数返回

    java.awt.Rectangle[x=-1920,y=0,width=3840,height=1080]
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  • 244
    int screenResolution = Toolkit.getDefaultToolkit().getScreenResolution();
System.out.println(""+screenResolution);
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