如何在Java 8中加入不带分隔符的String []？

Question

There are lots of questions about how to join a String[] in Java 8 with a delimiter, but how should a String[] be joined without a delimiter?

For example, {"a", "b", "c"} becomes "abc" .

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Note: I know how to write a small function for this myself, so please do not leave custom solutions. I am looking for a one-liner from the standard library.

Answer 1

public class Test {
    public static void main(String[] args) {
        System.out.println( String.join("", new String[]{"a", "b", "c"}) );
}}

Outputs: abc

The relevant part being String.join("", arrayStrings);

Javadoc for String.join

Answer 2

Adding to what has already been said, you can even do it as simple as this if you so prefer:

public class Test {
    public static void main(String[] args) {
        System.out.println(String.join("", "a", "b", "c"));
    }
}

Ie you don't even have to wrap it in an array; since String.join takes a ... (variable argument), you can just specify any number of String arguments without explicitly wrapping them in an String[] object.

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Note : the big disadvantage of the approach above is that it obscures the distinction between the delimiter and the delimited strings; @Aaron's answer is generally preferable. But anyhow, it deserves to be mentioned that you can actually write it like this also.