How to Read PEM or DER Encoded X509Certificate In Java

import java.io.InputStream;
import java.math.BigInteger;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.security.KeyFactory;
import java.security.PrivateKey;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.security.interfaces.RSAPublicKey;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.RSAPrivateCrtKeySpec;
import java.security.spec.X509EncodedKeySpec;
import java.util.Base64;

import org.junit.Test;

public class PEMTest {

    /**
     * 

     * In the case of a certificate factory for X.509 certificates, the certificate provided in {@code inStream} must be
     * DER-encoded and may be supplied in binary or printable (Base64) encoding. If the certificate is provided in
     * Base64 encoding, it must be bounded at the beginning by -----BEGIN CERTIFICATE-----, and must be bounded at the
     * end by -----END CERTIFICATE-----.
     *
     * @throws Exception
     */
    @Test
    public void readX509Certificate() throws Exception {
        CertificateFactory factory = CertificateFactory.getInstance("X.509");
        InputStream input = ClassLoader.getSystemResourceAsStream("server.cert.pem");
        X509Certificate cert = (X509Certificate) factory.generateCertificate(input);
        System.out.println(cert);
    }
}