标签:oid class test als 元素 equals 需要 rgs 否则
deepEquals和equals是Arrays类中两个静态方法,主要功能用来比较两个数组。
通过如下代码查看他们的细微区别:
public class Test { public static void main(String[] args) { String[][] name1 = {{ "G","a","o" },{ "H","u","a","n"},{ "j","i","e"}}; String[][] name2 = {{ "G","a","o" },{ "H","u","a","n"},{ "j","i","e"}}; System.out.println(Arrays.equals(name1, name2)); // false System.out.println(Arrays.deepEquals(name1, name2));// true } }
public class Test { public static void main(String[] args) { String[] name1 = {"G","a","o","H","u","a","n","j","i","e"}; String[] name2 = {"G","a","o","H","u","a","n","j","i","e"}; System.out.println(Arrays.equals(name1, name2)); // true System.out.println(Arrays.deepEquals(name1, name2)); // true } }
总结:
1、deepEquals用于判定两个指定数组彼此是否深层相等,此方法适用于任意深度的嵌套数组。
2、equals用于判定两个数组是否相等,如果两个数组以相同顺序包含相同元素,则返回true,否则返回false。
3、通过比对“代码一”和“代码二”我们可以得出这样一个结论:如果两个数组使用equals返回true,则使用deepEquals也返回true,也就是说在比较的两个数组均为一维数组的前提下,equals和deepEquals的比较结果没有差别;
4、如果要比较多为数组,则需要使用deepEquals方法;
Java-Arrays类-deepEquals()和equals()详解
标签:oid class test als 元素 equals 需要 rgs 否则
原文地址:http://www.cnblogs.com/xiaozuoliunian/p/7783897.html