e584. Retrieving a Predefined Color by Name

最新推荐文章于 2021-01-18 23:58:22 发布

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本文介绍了一种方法，可以通过字符串名称从Java AWT Color类中检索预定义的颜色。例如，使用字符串red可以获取到预定义的颜色红色。此方法为开发者提供了灵活的色彩选择方式。

The Color class contains a number of predefined colors such as red and green. This example demonstrates how to retrieve one of these predefined colors using a string. For example, the predefined color java.awt.Color.red could be retrieved with the string "red".

    // Returns a Color based on 'colorName' which must be one of the predefined colors in
    // java.awt.Color. Returns null if colorName is not valid.
    public Color getColor(String colorName) {
        try {
            // Find the field and value of colorName
            Field field = Class.forName("java.awt.Color").getField(colorName);
            return (Color)field.get(null);
        } catch (Exception e) {
            return null;
        }
    }

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