1. 1차 배열package basic_html;import java.util.Arrays;public class arr1 { public static void main(String[] args) { int a[] = {1, 2, 3, 4, 5}; int[] b = {10, 20, 30, 40, 50}; System.out.println(a.length); System.out.println(a[3]); System.out.println(Arrays.toString(a)); String c[] = {"홍길동", "이순신", "강감찬"}; System.out.println(Arrays.toString(c)); //int data[] = new int[4]; Integer data[] = ..