java 如何将双精度列表转换为字符串列表？
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How to convert List of Double to List of String?
提问by Rasmus
This 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.
这对你们所有人来说可能太容易了，但我只是在一个项目中学习和实现 Java 并且坚持这个。
How to convert Listof Doubleto ListString?
如何转换List的Double到ListString？
回答by alpian
There are many ways to do this but here are two styles for you to choose from:
有很多方法可以做到这一点，但这里有两种样式供您选择：
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:
但一个更酷的方法是使用现代集合 API（我最喜欢的是Guava）并以更实用的方式执行此操作：
List<String> strings = Lists.transform(ds, new Function<Double, String>() {
@Override
public String apply(Double from) {
return from.toString();
}
});
回答by Thomas Jungblut
You have to iterate over your double list and add to a new list of strings.
您必须遍历双列表并添加到新的字符串列表中。
List<String> stringList = new LinkedList<String>();
for(Double d : YOUR_DOUBLE_LIST){
stringList.add(d.toString());
}
return stringList;
回答by Mob
List<Double> ds = new ArrayList<Double>();
// fill ds with Doubles
List<String> strings = ds.stream().map(op -> op.toString()).collect(Collectors.toList());
回答by Erhan Bagdemir
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());
