export declare class StringUtil {
    static encodeHTML(str: string): string;
    static getFileName(source: string): string;
    static startsWith(source: string, str: string, ignoreCase?: boolean): boolean;
    static endsWith(source: string, str: string, ignoreCase?: boolean): boolean;
    static trim(targetString: string): string;
    static trimLeft(targetString: string): string;
    static trimRight(targetString: string): string;
    static convertToHtmlColor(argb: number, hasAlpha?: boolean): string;
    static convertFromHtmlColor(str: string, hasAlpha?: boolean): number;
    static convertToRGBA(str: string): string;
    static HEX2RGB(hex: string): string;
    static HEX2DEC(hex: string): string;
}