Here is an example of how to use the JsonParserSequence class from the org.apache.commons.io package in Java:

import org.codehaus.jackson.JsonFactory;
import org.codehaus.jackson.JsonParser;
import org.codehaus.jackson.JsonToken;
import org.apache.commons.io.input.JsonParserSequence;
import java.io.StringReader;

public class Main {
    public static void main(String[] args) throws Exception {
        String json1 = "{\"name\":\"John\"}";
        String json2 = "{\"age\":30}";

        JsonFactory jsonFactory = new JsonFactory();
        JsonParser jsonParser1 = jsonFactory.createJsonParser(new StringReader(json1));
        JsonParser jsonParser2 = jsonFactory.createJsonParser(new StringReader(json2));
        JsonParserSequence jsonParserSequence = new JsonParserSequence(jsonParser1, jsonParser2);

        while (jsonParserSequence.nextToken() != null) {
            String fieldname = jsonParserSequence.getCurrentName();
            if ("name".equals(fieldname)) {
                jsonParserSequence.nextToken();
                System.out.println(jsonParserSequence.getText());
            }
            if ("age".equals(fieldname)) {
                jsonParserSequence.nextToken();
                System.out.println(jsonParserSequence.getIntValue());
            }
        }
        jsonParserSequence.close();
    }
}

In this example, we create two JsonParser objects to parse two JSON strings, and a JsonParserSequence object that concatenates the two JsonParser objects. We use the JsonParserSequence object to parse the two JSON strings and