本文介绍了如何在 Java 中对二维数组进行深拷贝?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我刚刚在我的 2d boolean
数组上使用了 .clone()
,认为这是一个深拷贝.
I just got bit by using .clone()
on my 2d boolean
array, thinking that this was a deep copy.
如何对我的 boolean[][]
数组执行深层复制?
How can I perform a deep copy of my boolean[][]
array?
我应该遍历它并执行一系列 System.arraycopy
吗?
Should I loop through it and do a series of System.arraycopy
's?
推荐答案
是的,您应该遍历 2D 布尔数组以对其进行深度复制.如果您使用的是 Java 6,还可以查看 java.util.Arrays#copyOf
方法.
Yes, you should iterate over 2D boolean array in order to deep copy it. Also look at java.util.Arrays#copyOf
methods if you are on Java 6.
我建议使用 Java 6 的下一个代码:
I would suggest the next code for Java 6:
public static boolean[][] deepCopy(boolean[][] original) {
if (original == null) {
return null;
}
final boolean[][] result = new boolean[original.length][];
for (int i = 0; i < original.length; i++) {
result[i] = Arrays.copyOf(original[i], original[i].length);
// For Java versions prior to Java 6 use the next:
// System.arraycopy(original[i], 0, result[i], 0, original[i].length);
}
return result;
}
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