Написать парсер для Yahoo Finance в режиме XML (format=xml).

BuildQuery

package com.company.yahoo.finance.xml;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

class BuildQuery {
	
	static void performRequest(String urlStr, String path) throws IOException {
        URL url = new URL(urlStr);
        StringBuilder sb = new StringBuilder();

        HttpURLConnection http = (HttpURLConnection) url.openConnection();
        try (BufferedReader br = new BufferedReader(new InputStreamReader(http.getInputStream()))){
            
            String s;
            while((s=br.readLine())!=null)
            	sb.append(s);
        }
        
        System.out.println("Полученный тектовый ответ от Yahoo  в виде :\n" + "---------------------------------------------\n" + sb+"\n");

		File file = new File(path);
        try(PrintWriter fwr = new PrintWriter(file)){
            fwr.write(sb.toString());   
        	}
    
    }
	
	static Query getParseRequestJABX(String path){	        
		
		File file = new File(path);
		Query queryTMP = null;		
		try {           
            JAXBContext jaxbContext = JAXBContext.newInstance(Query.class);
            Marshaller marshaller = jaxbContext.createMarshaller();

            // читабельное форматирование
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

             // читаем из файла
            Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
            queryTMP = (Query) unmarshaller.unmarshal(file);
            
            System.out.println("Проверяем запарсенный XML :\n" + "---------------------------------------------");
        
	        marshaller.marshal(queryTMP, System.out);
	         
	        } catch (JAXBException e) {
	            e.printStackTrace();
	        }
		
		System.out.println("\nРаботаем с объектами :\n" + "---------------------------------------------");
		
		return queryTMP;
        
}
	

	


}

console

Полученный тектовый ответ от Yahoo  в виде :
---------------------------------------------
<?xml version="1.0" encoding="UTF-8"?>
<query xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" yahoo:count="2" yahoo:created="2016-10-18T20:07:32Z" yahoo:lang="en-US"><results><rate id="USDEUR"><Name>USD/EUR</Name><Rate>0.9105</Rate><Date>10/18/2016</Date><Time>7:56pm</Time><Ask>0.9110</Ask><Bid>0.9105</Bid></rate><rate id="USDUAH"><Name>USD/UAH</Name><Rate>25.5800</Rate><Date>10/18/2016</Date><Time>5:06pm</Time><Ask>25.8300</Ask><Bid>25.5800</Bid></rate></results></query><!-- total: 33 -->
<!-- prod_bf1_1;paas.yql;queryyahooapiscomproductionbf1;78e4687a-8c17-11e6-9353-d4ae5297450a -->

Проверяем запарсенный XML :
---------------------------------------------
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<query xmlns:ns1="http://www.yahooapis.com/v1/base.rng" ns1:count="2" ns1:created="2016-10-18T20:07:32Z" ns1:lang="en-US">
    <results>
        <rate id="USDEUR">
            <Ask>0.911</Ask>
            <Bid>0.9105</Bid>
            <Date>10/18/2016</Date>
            <Name>USD/EUR</Name>
            <Rate>0.9105</Rate>
            <Time>7:56pm</Time>
        </rate>
        <rate id="USDUAH">
            <Ask>25.83</Ask>
            <Bid>25.58</Bid>
            <Date>10/18/2016</Date>
            <Name>USD/UAH</Name>
            <Rate>25.58</Rate>
            <Time>5:06pm</Time>
        </rate>
    </results>
</query>

Работаем с объектами :
---------------------------------------------
[Rate{id=USDEUR,name='USD/EUR', rate=0.9105, date='10/18/2016', time='7:56pm', ask=0.911, bid=0.9105}, Rate{id=USDUAH,name='USD/UAH', rate=25.58, date='10/18/2016', time='5:06pm', ask=25.83, bid=25.58}]

Main

package com.company.yahoo.finance.xml;

//		Написать парсер для Yahoo Finance в режиме XML (format=xml).


class Main {
    
    public static void main(String[] args) throws Exception {

        String request = "http://query.yahooapis.com/v1/public/yql?format=xml&q=select%20*%20from%20" +
                "yahoo.finance.xchange%20where%20pair%20in%20(\"USDEUR\",%20\"USDUAH\")&env=store://datatables.org/alltableswithkeys";
        String path = "D:\\1\\yahoo.xml";
        
        BuildQuery.performRequest(request, path);
        
        Query query = BuildQuery.getParseRequestJABX(path);

        System.out.println(query.getResults().getRate());
    
    }
    
	

}

Query

package com.company.yahoo.finance.xml;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;


@XmlRootElement(name = "query")
class Query {
	private int count;
	private String created;
	private String lang;
	
	private Results results = new Results();

	public int getCount() {
	        return count;
	    }
	  @XmlAttribute(namespace = "http://www.yahooapis.com/v1/base.rng")
	  public void setCount(int count) {
	        this.count = count;
	    }
	    
	  public String getCreated() {
	        return created;
	    }
	  @XmlAttribute(namespace = "http://www.yahooapis.com/v1/base.rng")
	  public void setCreated(String created) {
	        this.created = created;
		    }
	  
	  public String getLang() {
	        return lang;
	    }
	  @XmlAttribute(namespace = "http://www.yahooapis.com/v1/base.rng")
	  public void setLang(String lang) {
	        this.lang = lang;
		    }
	  
	    public Results getResults() {
	        return results;
	    }

	    @XmlElement(name = "results")
	    public void setResults(Results results) {
	        this.results = results;
	    }

	    @Override
	    public String toString() {
	        return this.results.toString();
	    }
	    
 
	    
}

Rate

package com.company.yahoo.finance.xml;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement (name="rate")
public class Rate {
    private String id;
    private String name;
    private double rate;
    private String date;
    private String time;
    private double ask;
    private double bid;
    
    public Rate(){
    	
    	}

    
    public String getId() {
        return id;
    }
    @XmlAttribute(required = true)
    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }
    @XmlElement(name="Name")
    public void setName(String name) {
        this.name = name;
    }

    public double getRate() {
        return rate;
    }
    @XmlElement(name="Rate")
    public void setRate(double rate) {
        this.rate = rate;
    }

    public String getDate() {
        return date;
    }
    @XmlElement(name="Date")
    public void setDate(String date) {
        this.date = date;
    }

    public String getTime() {
        return time;
    }
    @XmlElement(name="Time")
    public void setTime(String time) {
        this.time = time;
    }

    public double getAsk() {
        return ask;
    }
    @XmlElement(name="Ask")
    public void setAsk(double ask) {
        this.ask = ask;
    }

    public double getBid() {
        return bid;
    }
    @XmlElement(name="Bid")
    public void setBid(double bid) {
        this.bid = bid;
    }

    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder("Rate{");
        sb.append("id=").append(id).append(",")
				        .append("name='").append(name).append('\'')
				        .append(", rate=").append(rate)
				        .append(", date='").append(date).append('\'')
				        .append(", time='").append(time).append('\'')
				        .append(", ask=").append(ask)
				        .append(", bid=").append(bid)
				        .append('}');
        return sb.toString();
    }
}

Results

package com.company.yahoo.finance.xml;

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement (name="results")
class Results {
    private List<Rate> rate = new ArrayList<Rate>();

    public List<Rate> getRate() {
        return rate;
    }

    @XmlElement(name = "rate")
    public void setRate(List<Rate> rate) {
        this.rate = rate;
    }
}