Fastest way to put contents of Set<String> to a single String with words separated by a whitespace?
- by Lars Andren
I have a few Set<String>s and want to transform each of these into a single String where each element of the original Set is separated by a whitespace " ".
A naive first approach is doing it like this
Set<String> set_1;
Set<String> set_2;
StringBuilder builder = new StringBuilder();
for (String str : set_1) {
builder.append(str).append(" ");
}
this.string_1 = builder.toString();
builder = new StringBuilder();
for (String str : set_2) {
builder.append(str).append(" ");
}
this.string_2 = builder.toString();
Can anyone think of a faster, prettier or more efficient way to do this?
