How to convert List of Double to List of String?

Thi开发者_如何学JAVAs just might be too easy for all of you, but I am just learning and implementing Java in a project and am stuck with this.

How to convert List of Double to List String?

There are many ways to do this but here are two styles for you to choose from:

List<Double> ds = new ArrayList<Double>();
// fill ds with Doubles
List<String> strings = new ArrayList<String>();
for (Double d : ds) {
    // Apply formatting to the string if necessary
    strings.add(d.toString());
}

But a cooler way to do this is to use a modern collections API (my favourite is Guava) and do this in a more functional style:

List<String> strings = Lists.transform(ds, new Function<Double, String>() {
        @Override
        public String apply(Double from) {
            return from.toString();
        }
    });

You have to iterate over your double list and add to a new list of strings.

List<String> stringList = new LinkedList<String>();
for(Double d : YOUR_DOUBLE_LIST){
   stringList.add(d.toString());
}
return stringList;

List<Double> ds = new ArrayList<Double>();
// fill ds with Doubles
List<String> strings = ds.stream().map(op -> op.toString()).collect(Collectors.toList());

List<Double> doubleList = new ArrayList<Double>();
doubleList.add(1.1d);
doubleList.add(2.2d);
doubleList.add(3.3d);

List<String> listOfStrings = new ArrayList<String>();
for (Double d:doubleList)
     listOfStrings.add(d.toString());