public void setReadyDateTime(java.util.Date readyDateTime) {
        this.readyDateTime = readyDateTime;
    }
<p>
The date and time when the cluster was ready to run steps.
</p>

@param readyDateTime
       The date and time when the cluster was ready to run steps.
aws-java-sdk-emr/src/main/java/com/amazonaws/services/elasticmapreduce/model/ClusterTimeline.java