e604. getting the current screen refresh rate and number of colors.txt

这里面包含了一百多个JAVA源文件

This example retrieves the refresh rate (in Hz) and number of supported colors for all screens. 
    GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
    GraphicsDevice[] gs = ge.getScreenDevices();
    
    for (int i=0; i<gs.length; i++) {
        DisplayMode dm = gs[i].getDisplayMode();
    
        // Get refresh rate in Hz
        int refreshRate = dm.getRefreshRate();
        if (refreshRate == DisplayMode.REFRESH_RATE_UNKNOWN) {
            // Unknown rate
        }
    
        // Get number of colors
        int bitDepth = dm.getBitDepth();
        if (bitDepth == DisplayMode.BIT_DEPTH_MULTI) {
            // Multiple bit depths are supported in this display mode
        } else {
            int numColors = (int)Math.pow(2, bitDepth);
        }
    }

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