import com.sun.java.swing.plaf.gtk.GTKConstants.TextDirection; //导入依赖的package包/类
private static int getTextDirection(SynthContext context) {
    TextDirection dir = TextDirection.NONE;
    JComponent comp = context.getComponent();
    if (comp != null) {
        ComponentOrientation co = comp.getComponentOrientation();
        if (co != null) {
            dir = co.isLeftToRight() ?
                TextDirection.LTR : TextDirection.RTL;
        }
    }
    return dir.ordinal();
}
 

import com.sun.java.swing.plaf.gtk.GTKConstants.TextDirection; //导入依赖的package包/类
/**
 * Load a native Gtk stock icon.
 *
 * @param longname a desktop property name. This contains icon name, size
 *        and orientation, e.g. <code>"gtk.icon.gtk-add.4.rtl"</code>
 * @return an <code>Image</code> for the icon, or <code>null</code> if the
 *         icon could not be loaded
 */
protected Object lazilyLoadGTKIcon(String longname) {
    // Check if we have already loaded it.
    Object result = desktopProperties.get(longname);
    if (result != null) {
        return result;
    }

    // We need to have at least gtk.icon.<stock_id>.<size>.<orientation>
    String str[] = longname.split("\\.");
    if (str.length != 5) {
        return null;
    }

    // Parse out the stock icon size we are looking for.
    int size = 0;
    try {
        size = Integer.parseInt(str[3]);
    } catch (NumberFormatException nfe) {
        return null;
    }

    // Direction.
    TextDirection dir = ("ltr".equals(str[4]) ? TextDirection.LTR :
                                                TextDirection.RTL);

    // Load the stock icon.
    BufferedImage img = getStockIcon(-1, str[2], size, dir.ordinal(), null);
    if (img != null) {
        // Create the desktop property for the icon.
        setDesktopProperty(longname, img);
    }
    return img;
}
 

import com.sun.java.swing.plaf.gtk.GTKConstants.TextDirection; //导入依赖的package包/类
/**
 * Load a native Gtk stock icon.
 *
 * @param longname a desktop property name. This contains icon name, size
 *        and orientation, e.g. {@code "gtk.icon.gtk-add.4.rtl"}
 * @return an {@code Image} for the icon, or {@code null} if the
 *         icon could not be loaded
 */
protected Object lazilyLoadGTKIcon(String longname) {
    // Check if we have already loaded it.
    Object result = desktopProperties.get(longname);
    if (result != null) {
        return result;
    }

    // We need to have at least gtk.icon.<stock_id>.<size>.<orientation>
    String str[] = longname.split("\\.");
    if (str.length != 5) {
        return null;
    }

    // Parse out the stock icon size we are looking for.
    int size = 0;
    try {
        size = Integer.parseInt(str[3]);
    } catch (NumberFormatException nfe) {
        return null;
    }

    // Direction.
    TextDirection dir = ("ltr".equals(str[4]) ? TextDirection.LTR :
                                                TextDirection.RTL);

    // Load the stock icon.
    BufferedImage img = getStockIcon(-1, str[2], size, dir.ordinal(), null);
    if (img != null) {
        // Create the desktop property for the icon.
        setDesktopProperty(longname, img);
    }
    return img;
}