java - 字节数组是二维字节数组吗？

Question

我有一个字节数组:

private final static byte[][] ARRAY = {
    { (byte) 0xaa, (byte) 0xbb, (byte) 0xcc, (byte) 0xdd },
    { (byte) 0x11, (byte) 0x22, (byte) 0x33, (byte) 0x44 }
};

给定一个任意字节数组:

byte[] check = { (byte) 0x11, (byte) 0x22, (byte) 0x33, (byte) 0x44) };

或

byte[] check2 = { (byte) 0x12, (byte) 0x23, (byte) 0x34, (byte) 0x45) };

检查 check 或 check2 是否在 ARRAY 中与所写的完全一致(以相同的顺序等)的最佳方法是什么？

我可以根据需要将 ARRAY 更改为任何其他数据结构，但 check 和 check2 作为字节数组提供。

Answer 1

您可以使用Arrays.equals()来比较两个数组。来自 javadoc :

Returns true if the two specified arrays of bytes are equal to one another. Two arrays are considered equal if both arrays contain the same number of elements, and all corresponding pairs of elements in the two arrays are equal.

byte[] check = { (byte) 0x11, (byte) 0x22, (byte) 0x33, (byte) 0x44 };
byte[] check2 = { (byte) 0x12, (byte) 0x23, (byte) 0x34, (byte) 0x45 };

int i = 0;
for (; i < ARRAY.length; i++) {
    if (Arrays.equals(ARRAY[i], check)) {
        System.out.println("check[] found at index: " + i);
        break;
    }
}
if (i == ARRAY.length) {
    System.out.println("check[] not found");
}

for (i = 0; i < ARRAY.length; i++) {
    if (Arrays.equals(ARRAY[i], check2)) {
        System.out.println("check2[] found at index: " + i);
        break;
    }
}
if (i == ARRAY.length) {
    System.out.println("check2[] not found");
}

输出:

check[] found at index: 1
check2[] not found