Show all indices.

Testje.java

import org.elasticsearch.action.admin.indices.status.IndicesStatusResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.metrics.CounterMetric;
import org.elasticsearch.index.field.data.FieldData;
import org.elasticsearch.index.field.data.ints.SingleValueIntFieldData;
import org.elasticsearch.node.Node;
import org.elasticsearch.node.NodeBuilder;

/**
 */
public class Testje {

    public static void main(String[] args) {
        Node node = NodeBuilder.nodeBuilder().node();
        node.start();
        Client client = node.client();
        client.admin().indices().prepareCreate("test1").execute().actionGet();
        client.admin().indices().prepareCreate("test2").execute().actionGet();
        client.admin().indices().prepareCreate("test3").execute().actionGet();
        IndicesStatusResponse response = client.admin().indices().prepareStatus().execute().actionGet();
        for (String index : response.indices().keySet()) {
            System.out.println(index);
        }
    }

}