자바 JAVA ] 길이구하기 length / length() / size()

1. length()

    String a = "abc";
        int strlen = a.length();

2. length

 int[] i = new int[10];
        int intlen = i.length;

3. size

ArrayList<Integer> arr = new ArrayList<>();
        arr.add(1);
        int arrlen = arr.size();

총정리

import java.util.ArrayList;

public class Main {
    public static void main(String[] args) {
        String a = "abc";
        int strlen = a.length();
        int[] i = new int[10];
        int intlen = i.length;
        ArrayList<Integer> arr = new ArrayList<>();
        arr.add(1);
        int arrlen = arr.size();

    }
}