package coll;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Iterator;
public class Set {
public static void main(String[] args) {
// 중복 X, 순서X
HashSet<String> set = new HashSet<String>();
set.add("홍길동");
set.add("김길동");
set.add("이길동");
set.add("박길동");
set.add("홍길동");
System.out.println(set);
System.out.println("======================================");
for (String str : set) {
System.out.println(str);
}
System.out.println("======================================");
ArrayList<String> list = new ArrayList<>(set);
for (int i = 0; i < list.size(); i++) {
System.out.println(list.get(i));
}
System.out.println("======================================");
// Iterator
Iterator<String> it = set.iterator();
while (it.hasNext()) {
System.out.println(it.next());
}
}
}
[박길동, 김길동, 홍길동, 이길동]
======================================
박길동
김길동
홍길동
이길동
======================================
박길동
김길동
홍길동
이길동
======================================
박길동
김길동
홍길동
이길동
'2023.11.21-2024.05.31' 카테고리의 다른 글
231221 JAVA Test02 (0) | 2023.12.26 |
---|---|
231221 JAVA Set02 (0) | 2023.12.26 |
231221 JAVA Map01 (1) | 2023.12.26 |
231221 JAVA List02 (1) | 2023.12.26 |
231221 JAVA List01 (0) | 2023.12.26 |