时代Java

Java 将第二个数组中的值添加到第一个数组，重用第一个数组，如果可能的话，结果将被扩展以适合数组中数组元素的最大数量。

欢马劈雪

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将第二个数组中的值添加到第一个数组中，并在可能的情况下重用第一个数组。结果将扩展为适合任一数组中最大数组元素的数量

实例源码：

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/** 时代Java - nowjava.com 提 供 **/

//package com.nowjava;

import java.util.Arrays;

public class Main {

public static void main(String[] argv) throws Exception {

int[] first = new int[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

int[] second = new int[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };

System.out.println(java.util.Arrays.toString(add(first, second)));

}

private static int[] EMPTY_INT_ARRAY = new int[0];

private static float[] EMPTY_FLOAT_ARRAY = new float[0];

/**

* Adds the values from the second array to the first,

* reusing the first array if possible

* The result will be expanded to fit the maximum number of array elements in either array

public static int[] add(int[] first, int[] second) {

if (first == null && second == null)

return EMPTY_INT_ARRAY;

if (second == null)

return first;

if (first == null)
        /* 
         来自 
        *时代Java公众号 - N o w J a  v a . c o m*/

return Arrays.copyOf(second, second.length);

if (first.length < second.length) {

first = Arrays.copyOf(first, second.length);

}

int nOverlap = Math.min(first.length, second.length);

for (int i = 0; i < nOverlap; i++) {

first[i] += second[i];

}

return first;

}

/**

* Adds the values from the second array to the first,

* reusing the first array if possible

* The result will be expanded to fit the maximum number of array elements in either array

public static float[] add(float[] first, float[] second) {

if (first == null && second == null)

return EMPTY_FLOAT_ARRAY;

if (second == null)

return first;

if (first == null)

return Arrays.copyOf(second, second.length);

if (first.length < second.length) {

first = Arrays.copyOf(first, second.length);

}

int nOverlap = Math.min(first.length, second.length);

for (int i = 0; i < nOverlap; i++) {

first[i] += second[i];

}

return first;

}

/**

* Adds the given value to the given position in the array, copying and padding with zeroes

* is required.

* @param array

* @param position
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编辑于 2020-03-26 09:23:272020-03-26 09:23:27

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