public void setDisplayId(String displayId) {
        this.displayId = displayId;
    }
<p>
The ID displayed for a case in the Amazon Web Services Support Center user interface.
</p>

@param displayId
       The ID displayed for a case in the Amazon Web Services Support Center user interface.
aws-java-sdk-support/src/main/java/com/amazonaws/services/support/model/DescribeCasesRequest.java