如果两个列表包含相同顺序的相同数量的元素,则两个列表相等。
假设我们有以下两个列表-
List<Integer>arrList1 = Arrays.asList(new Integer[] { 10, 20, 30, 45, 55, 70, 90, 100 }); List<Integer>arrList2 = Arrays.asList(new Integer[] {15, 25, 35, 50, 55, 75, 95, 120});
现在,让我们找出两个列表是否相等-
arrList1.equals(arrList2);
如果以上两个列表具有相等的元素,则返回TRUE,否则返回FALSE。
import java.util.Arrays; import java.util.List; public class Demo { public static void main(String[] a) { List<Integer>arrList1 = Arrays.asList(new Integer[] { 10, 20, 30, 45, 55, 70, 90, 100 }); List<Integer>arrList2 = Arrays.asList(new Integer[] {15, 25, 35, 50, 55, 75, 95, 120}); List<Integer>arrList3 = Arrays.asList(new Integer[] { 10, 20, 30, 45, 55, 70, 90, 100}); System.out.println("Are List 1 and List2 equal? "+arrList1.equals(arrList2)); System.out.println("Are List 2 and List3 equal? "+arrList2.equals(arrList2)); System.out.println("Are List 1 and List3 equal? "+arrList1.equals(arrList3)); } }
输出结果
Are List 1 and List2 equal? false Are List 2 and List3 equal? true Are List 1 and List3 equal? true