pass datasource for job to AWS Glue client in JAVA

Question

How can i mention datasource for AWS glue job in java 

I am using below code and want to mention S3 path to be used as datasource

AWSGlueClient glue = null; // how to instantiate client
StartJobRunRequest jobRunRequest = new StartJobRunRequest();
jobRunRequest.setJobName("TestJob");
StartJobRunResult jobRunResult = glue.startJobRun(jobRunRequest);