Authenticate with application id using Certificated-based Authentication

I registered the app on the Microsoft Entra admin center by referring to this page:

https://learn.microsoft.com/en-us/graph/auth-v2-service?tabs=http

Then I created public/private key using openssl. Here is the commands.

$ openssl genrsa -out ms365-private.key 2048
$ openssl req -new -x509 -key ms365-private.key -out ms365-public.crt -days 365000

Uploaded the public key (ms365-private.key) on the Microsoft Entra admin center, and I created this code.

TokenCredential credential = new ClientCertificateCredentialBuilder().tenantId("xxxxxxxx")
		.clientId("xxxxxxxx")
		.pemCertificate("/xxxx/xxxxx/ms365-private.key")
		.build();
graphClient = new GraphServiceClient(credential);

but if i execute some methods on this graphClient , this following error occurs

[ERROR] com.azure.identity.implementation.util.CertificateUtil.performLogging - PEM certificate provided does not contain -----BEGIN CERTIFICATE-----END CERTIFICATE----- block 
java.lang.IllegalArgumentException: PEM certificate provided does not contain -----BEGIN CERTIFICATE-----END CERTIFICATE----- block
    at com.azure.identity.implementation.util.CertificateUtil.publicKeyFromPem(CertificateUtil.java:79)
    at com.azure.identity.implementation.IdentityClientBase.getConfidentialClient(IdentityClientBase.java:196)
    at com.azure.identity.implementation.IdentitySyncClient.lambda$new$2(IdentitySyncClient.java:91)
    at com.azure.identity.implementation.SynchronousAccessor.getValue(SynchronousAccessor.java:45)
    at com.azure.identity.implementation.IdentitySyncClient.authenticateWithConfidentialClientCache(IdentitySyncClient.java:171)
    at com.azure.identity.ClientCertificateCredential.getTokenSync(ClientCertificateCredential.java:150)
    at com.microsoft.kiota.authentication.AzureIdentityAccessTokenProvider.getAuthorizationToken(AzureIdentityAccessTokenProvider.java:146)
    at com.microsoft.kiota.authentication.BaseBearerTokenAuthenticationProvider.authenticateRequest(BaseBearerTokenAuthenticationProvider.java:46)

Q. Should I also specify public key? If so, how to specify public key by using ClientCertificateCredentialBuilder?