What does this mean in JAVA?

Question

Java

Hello everyone, please tell me what they mean ...in JAVA
For example here

default Map<String, String> toMap(String... fieldNames) {
        return toMap(Arrays.asList(fieldNames));
    }

Why are they needed after string?

Answer 1

VarArgs - variable length arguments. In fact, this means that you can pass stock arguments arbitrarily.