import sun.security.provider.certpath.SunCertPathBuilderException; //导入依赖的package包/类
public static void main(String[] args) throws Exception {
    try {
        CertPathBuilder cpb = CertPathBuilder.
            getInstance(CertPathBuilder.getDefaultType());
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        File f = new File
            (System.getProperty("test.src", "."), "speech2speech");
        X509Certificate cert = (X509Certificate)
            cf.generateCertificate(new FileInputStream(f));
        TrustAnchor anchor = new TrustAnchor(cert, null);

        X509CertSelector xs = new X509CertSelector();

        // a non-exist subject which will ruin the builder soon
        xs.setSubject("CN=A, OU=A, O=A, L=A, ST=A, C=A");
        PKIXBuilderParameters pkp =
            new PKIXBuilderParameters(Collections.singleton(anchor), xs);
        cpb.build(pkp);
    } catch(SunCertPathBuilderException e) {
        System.out.println("Got the Exception: ");
        try {
            ObjectOutputStream o =
                new ObjectOutputStream(new ByteArrayOutputStream());
            o.writeObject(e);
            o.close();
        } catch(NotSerializableException e2) {
            System.out.println("Test fail: bug not corrected");
            throw e2;
        }
        System.out.println("Test pass: SCPEE is Serializable");
        return;
    }
    throw new Exception("Test fail: Strange, no SCPEE thrown");
}