deepEquals和equals是Java中Arrays類的兩個靜态方法，可是它們之間有什麼樣的差別呢?
代碼一、
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
}
}
代碼二、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
}
}
總結：
1、deepEquals用于判定兩個指定數組彼此是否深層相等，此方法适用于任意深度的嵌套數組。
2、equals用于判定兩個數組是否相等，如果兩個數組以相同順序包含相同元素，則傳回true，否則傳回false。
3、通過比對“代碼一”和“代碼二”我們可以得出這樣一個結論：如果兩個數組使用equals傳回true，則使用deepEquals也傳回true，也就是說在比較的兩個數組均為一維數組的前提下，equals和deepEquals的比較結果沒有差别；
4、如果要比較多為數組，則需要使用deepEquals方法；