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javaarraylistcollectionshashmapiterator

Retrieving values from HashMap

I have my HashMap as below:

Map<String, List<Double>> map = new HashMap<String, List<Double>>();//map
Iterator<java.util.Map.Entry<String, List<Double>>> iterator = map.entrySet().iterator();
List<Double> times = new ArrayList<Double>();//arraylist

There is a String as a key and two double values. What I want to do is when I call the key I want to assign those two double values individually into two double variables.

Solution

  • Without any error checking (such as missing keys or malshaped List):

    List<Double> times = map.get("theKey");
if(times.size() > 1){//To avoid the java.lang.ArrayIndexOutOfBoundsException
    double t1 = times.get(0);
    double t2 = times.get(1);
}