import java.util.*;
public class Main {
public static void main(String[] args) {
String s1 = "Hello ";
String s2 = "World";
s1 = s1 + s2;
String[] strings = {"This", "is", "a", "String"};
String sentence="";
for (String s : strings)
sentence += s + " ";
System.out.println(sentence);
StringBuilder sb = new StringBuilder(4);
for (String s : strings)
sb.append(s).append(" ");
System.out.println(sb.toString());
StringJoiner sj = new StringJoiner(", ", "[", "]");
for (String s : new String[]{"α", "β", "γ"}) {
sj.add(s);
}
System.out.println(sj);
String s = "Ιαν Φεβ Μάρ";
StringTokenizer st = new StringTokenizer(s, " ");
while (st.hasMoreTokens()) {
System.out.println(st.nextToken());
}
String[] split = s.split(" ");
for (String str : split)
System.out.println(str);
}
}