超简单，帮忙将以下JavaScript代码实现的功能转换为java

Question

超简单，帮忙将以下JavaScript代码实现的功能转换为java/**
 * currency1 and currency2 are string like 'EUR', 'USD' 
 */
function getExchangeRate(currency1, currency2) {
var a = {EUR:10, USD:8, JPY: 2, AUD: 3};
return a[currency1]/a[currency2];
}
实现为：
public static Double getExchangeRate(String currency1, String currency2){}

Answer 1

public static Double getExchangeRate(String currency1, String currency2){
   Object[][] a = {{"EUR"，10},{"USD","8"},{"JPY","2"},{"AUD","3"}},
  return a[currency1][1]/a[currency2][1]
}

Answer 2

这样？public static Double getExchangeRate(String currency1, String currency2){
    int []a = {10,8,2,3};
    return ((double)a[Integer.parseInt(currency1)])/a[Integer.parseInt(currency2)];
}

Answer 3

看来Java麻烦一些 Map<String, Double> currencyList = new HashMap<String, Double>();
currencyList.put("EUR", new Double(10));
currencyList.put("USD", new Double(8));
currencyList.put("JPY", new Double(2));
currencyList.put("AUD", new Double(3));
return currencyList.get(currency1).doubleValue() / currencyList.get(currency2);

Answer 4

看这个 刚才的不对
public static Double getExchangeRate(String currency1, String currency2){
   Map<String,Integer> map = new HashMap<String,Integer>();
   map.put("EUR",10);
   map.put("USD",8);
   map.put("JPY",2);
   map.put("AUD",3);
  return Double.valueOf(map.get(currency1))/Double.valueOf(map.get(currency2));
}

Answer 5

完整的代码 public static void main(String[] args) {
/** * currency1 and currency2 are string like 'EUR', 'USD' */ 
System.out.println(getExchangeRate("EUR", "JPY"));
}
public static Double getExchangeRate(String currency1, String currency2){
Map<String, Double> currencyList = new HashMap<String, Double>();
currencyList.put("EUR", new Double(10));
currencyList.put("USD", new Double(8));
currencyList.put("JPY", new Double(2));
currencyList.put("AUD", new Double(3));
return currencyList.get(currency1).doubleValue() / currencyList.get(currency2);
}