Java tutorial
//package com.java2s; import java.security.InvalidAlgorithmParameterException; import java.security.NoSuchAlgorithmException; import java.security.NoSuchProviderException; import java.security.cert.CertStore; import java.security.cert.CertStoreParameters; public class Main { static CertStore createCertStoreInstance(String type, CertStoreParameters params, String provider) throws InvalidAlgorithmParameterException, NoSuchAlgorithmException, NoSuchProviderException { if (provider == null) { return CertStore.getInstance(type, params); } return CertStore.getInstance(type, params, provider); } }