MongoClient client = null;
try {
List<MongoCredential> credentials = new ArrayList<MongoCredential>();
credentials.add(
    MongoCredential.createScramSha1Credential(
       "abc",
        "test",
        "abc@123".toCharArray()
    )
);
client = new MongoClient(host,credentials, MongoClientOptions
        .builder().connectionsPerHost(20)
        .threadsAllowedToBlockForConnectionMultiplier(15)
        .connectTimeout(5000)
        .writeConcern(WriteConcern.ACKNOWLEDGED).build());
} catch (Exception e) {
client = new MongoClient(host, MongoClientOptions
        .builder().connectionsPerHost(20)
        .threadsAllowedToBlockForConnectionMultiplier(15)
        .connectTimeout(5000)
        .writeConcern(WriteConcern.ACKNOWLEDGED).build());
//  e.printStackTrace();
}
client.getDatabase("admin").runCommand(new Document("ping",1));

com.mongodb.MongoSecurityException: Exception authenticating MongoCredential{mechanism=SCRAM-SHA-1, userName='abc', source='test', password=<hidden>, mechanismProperties={}}
at com.mongodb.connection.SaslAuthenticator.authenticate(SaslAuthenticator.java:61)
at com.mongodb.connection.InternalStreamConnectionInitializer.authenticateAll(InternalStreamConnectionInitializer.java:99)
at com.mongodb.connection.InternalStreamConnectionInitializer.initialize(InternalStreamConnectionInitializer.java:44)
at com.mongodb.connection.InternalStreamConnection.open(InternalStreamConnection.java:115)
at com.mongodb.connection.DefaultServerMonitor$ServerMonitorRunnable.run(DefaultServerMonitor.java:128)
at java.lang.Thread.run(Unknown Source)