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JAVA为什么arrayCopy是系统调用?

转载 作者:行者123 更新时间:2023-11-30 05:49:55 26 4
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例子

short size = 1234;
byte[] payload = {12,43, 55,123, 11, 55};

byte [] shortSize = ByteBuffer.allocate(2).putShort(size).array();
byte[] entirePayload = new byte[shortSize.length+payload.length];

System.arraycopy(shortSize, 0, entirePayload, 0, 2);
System.arraycopy(payload, 0, entirePayload, 2, payload.length);

这是一个 Java 系统调用是否有潜在的原因?

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