자바 리스트 List - 1

자바 리스트 List - 1

import java.util.ArrayList;

import java.util.Date;

public class ListTest {

public static void main(String[] args) {

// 순서가있고중복허용

ArrayList list = new ArrayList();

list.add("홍길동")

list.add(20)

list.add(78.3)

list.add( new Date())

/*list.add("홍길동");

list.add(20);

list.add(78.3);

list.add( new Date());*/

//출력

System.out.println(list.toString()); //[홍길동, 20, 78.3, Sat Jun 27 19:55:04 KST 2015]

//첨자(인덱스)

System.out.println(list.get(1)); //20

//삭제

list.remove(0);

System.out.println(list.toString()); ///[20, 78.3, Sat Jun 27 19:55:04 KST 2015]

//삽입

list.add(1, "유관순")

System.out.println(list.toString()); //[20, 유관순, 78.3, Sat Jun 27 19:55:04 KST 2015]

//크기

System.out.println(list.size()); //4

//수정

list.set(1, "강감찬") //

System.out.println(list.toString()); //[20, 강감찬, 78.3, Sat Jun 27 19:55:04 KST 2015]

//clear

list.clear();

System.out.println(list.toString()); //[]

}//end main

}//end class