Forming a request to Elasticsearch

How to generate a query for Elasticsearch with parameters.for example
> GET /bank/_search

  "query": { "match_all": {} }

How information is added in parentheses to the query. Through what it is possible to check a conclusion of request in Windows as I understand it is necessary to use curl but it displays not that information.
Is it possible at all to analyze elasticsearch parameters for the JAVA program

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