LogManagerHelper.java 文件源码

/**
 * Visible version of {@link java.util.logging.LogManager#getFormatterProperty(String, java.util.logging.Formatter)} .
 *
 * We return an instance of the class named by the "name" property.
 *
 * If the property is not defined or has problems we return the defaultValue.
 */
public static Formatter getFormatterProperty(@Nonnull LogManager manager, @Nullable String name, @Nullable Formatter defaultValue) {
    String val = manager.getProperty(name);
    try {
        if (val != null) {
            Class clz = ClassLoader.getSystemClassLoader().loadClass(val);
            return (Formatter) clz.newInstance();
        }
    } catch (Exception ex) {
        // We got one of a variety of exceptions in creating the
        // class or creating an instance.
        // Drop through.
    }
    // We got an exception.  Return the defaultValue.
    return defaultValue;
}