Question

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。

Answer 1

您可以使用Toolkit.getScreenSize()方法获取屏幕尺寸。

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();

如果您想在DPI中获得屏幕分辨率，则必须使用getScreenResolution()上的Toolkit方法。

资源：

Answer 2

此代码将枚举系统上的图形设备（如果安装了多个显示器），您可以使用该信息来确定显示器关联或自动放置（某些系统在应用程序时使用一个小侧显示器进行实时显示在后台运行，这样的显示器可以通过大小，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
}

Answer 3

此通话将为您提供所需的信息。

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

Answer 4

这是当前指定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);

Answer 5

这里有一些功能代码（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()

Answer 6

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

System.out.println(resolution);

Answer 7

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);

Answer 8

这三个函数返回Java中的屏幕大小。此代码考虑了多显示器设置和任务栏。包含的函数包括： getScreenInsets（）， getScreenWorkingArea（）和 getScreenTotalArea（）。

代码：

/**
 * 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;
}

Answer 9

这是我经常使用的一段代码。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);
}

在带有两个全高清显示器的计算机上，左侧的显示器设置为主显示器（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]

Answer 10

int screenResolution = Toolkit.getDefaultToolkit().getScreenResolution();
System.out.println(""+screenResolution);

Answer 11

有很多答案，但我仍然觉得它们不够充分，我的方法计算与屏幕尺寸相关的全局变量一次，并且还使用所有显示器的单个循环：

public final class ScreenArea {
    public static final Rectangle RECTANGLE;
    public static final int 
        LEFT, RIGHT, 
        TOP, BOTTOM, 
        MIN_WIDTH, MAX_WIDTH, 
        MIN_HEIGHT, MAX_HEIGHT, 
        TOTAL_WIDTH, TOTAL_HEIGHT;
    
    static {
        // Initialise local vars
        int left, right, top, bottom, minWidth, maxWidth, minHeight, maxHeight;
        left = top = minWidth = minHeight = Integer.MAX_VALUE;
        right = bottom = maxWidth = maxHeight = Integer.MIN_VALUE;
        // In a single loop process all bounds
        Rectangle bounds;
        for (GraphicsDevice device : GraphicsEnvironment.getLocalGraphicsEnvironment().getScreenDevices()) {
            bounds = device.getDefaultConfiguration().getBounds();
            if (left > bounds.x)
                left = bounds.x;
            if (right < bounds.x + bounds.width)
                right = bounds.x + bounds.width;
            if (top > bounds.y)
                top = bounds.y;
            if (bottom < bounds.y + bounds.height)
                bottom = bounds.y + bounds.height;
            if (minWidth > bounds.width)
                minWidth = bounds.width;
            if (maxWidth < bounds.width)
                maxWidth = bounds.width;
            if (minHeight > bounds.height)
                minHeight = bounds.height;
            if (maxHeight < bounds.height)
                maxHeight = bounds.height;
        }
        TOTAL_WIDTH = right - left;
        TOTAL_HEIGHT = bottom - top;
        RECTANGLE = new Rectangle(TOTAL_WIDTH, TOTAL_HEIGHT);
        // Transfer local to immutable global vars
        LEFT = left; RIGHT = right; TOP = top; BOTTOM = bottom;
        MIN_WIDTH = minWidth; MAX_WIDTH = maxWidth;
        MIN_HEIGHT = minHeight; MAX_HEIGHT = maxHeight;
    }
}

然后你可以随时使用，就像这样：

System.out.printf("LEFT=%d, ", ScreenArea.LEFT);
System.out.printf("RIGHT=%d%n", ScreenArea.RIGHT);
System.out.printf("TOP=%d, ", ScreenArea.TOP);
System.out.printf("BOTTOM=%d%n", ScreenArea.BOTTOM);
System.out.printf("MIN_WIDTH=%d, ", ScreenArea.MIN_WIDTH);
System.out.printf("MAX_WIDTH=%d%n", ScreenArea.MAX_WIDTH);
System.out.printf("MIN_HEIGHT=%d, ", ScreenArea.MIN_HEIGHT);
System.out.printf("MAX_HEIGHT=%d%n", ScreenArea.MAX_HEIGHT);
System.out.printf("SCREEN_AREA=%s%n", ScreenArea.RECTANGLE);

它在我的双显示器设置上打印：

LEFT=0, RIGHT=3840
TOP=0, BOTTOM=1080
MIN_WIDTH=1920, MAX_WIDTH=1920
MIN_HEIGHT=1080, MAX_HEIGHT=1080
SCREEN_AREA=java.awt.Rectangle[x=0,y=0,width=3840,height=1080]

如何在java中获得屏幕分辨率？

11 个答案: