export interface JavaInfo {
    path: string;
    version: string;
    type: 'system' | 'portable';
}
export declare class JavaChecker {
    private static readonly JAVA_DIR;
    private static readonly JAVA_URLS;
    private static getOptimalJavaDirectory;
    private static getArch;
    static getRequiredJavaVersion(serverVersion: string): '17' | '21';
    static checkJava(): Promise<boolean>;
    static getSystemJavaPath(): string | null;
    static getSystemJavaVersion(): string | null;
    private static shouldUpdateJava;
    private static downloadAndExtractWithStream;
    static getOrDownloadPortableJava(version: '17' | '21'): Promise<JavaInfo>;
    static ensureJava(serverVersion: string, usePortable?: boolean): Promise<JavaInfo>;
    static cleanupOldJava(): void;
    static getJavaInfo(): {
        dir: string;
        arch: string;
    };
}
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