Ex_1_2_08.md

title	算法4 Java解答 1.2.08
date	2019-02-22 07:35:22 +0800
draft	false
tags	JAVA
categories	技术 归档

1.2.08

问题：

Suppose that a[] and b[] are each integer arrays consisting of millions of inte- gers. What does the follow code do? Is it reasonably efficient? int[] t = a; a = b; b = t;

Answer. It swaps them. It could hardly be more efficient because it does so by copying references, so that it is not necessary to copy millions of elements.

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