deepequals和equals是java中arrays类的两个静态方法,可是它们之间有什么样的区别呢?
代码一、
import java.util.Arrays;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 }}代码二、
import java.util.Arrays;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。
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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;
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