java中将两个整数数组合并为一个数组

问题描述

我见过类似的问题，但没有一个提供我正在寻找的答案，所以如果这被认为是重复的，我提前道歉.我正在尝试将数组 {1, 2, 3} 和 {4, 5, 6} 组合成 {1, 2, 3, 4, 5, 6}.我做错了什么?我是java的超级新手.对不起，如果这个问题很愚蠢.

I've seen similar questions and none provide the answer that I'm looking for, so I apologize in advance if this is considered a duplicate.I'm trying to combine arrays {1, 2, 3} and {4, 5, 6} into {1, 2, 3, 4, 5, 6}. What am I doing incorrectly? I'm super new to java. Sorry if the question is stupid.

public class combine {
  public static void main(String[]args){

  int[]a = {1, 2, 3};
  int[]b = {4, 5, 6};
  int[]c = new int[a+b];
  for(int i=0; i<a.length; i++)
  System.out.print(c[i]+" ");
}
public static int[]merge(int[]a, int[]b){
  int[]c = new int[a.length+b.length];
  int i;
  for(i=0; i<a.length; i++)
     c[i] = a[i];

     for(int j=0; j<b.length; j++)
        c[i++]=b[j];
        return c;
}
}

推荐答案

代替

int[]c = new int[a+b];

您需要调用合并方法并将结果分配给数组，例如:

You need to call your merge method and assign the result to the array like :

int[]c = merge(a,b);

你的 for 循环也应该是:

Also you for loop should be :

int[]c = merge(a,b);
for(int i=0; i<c.length; i++)
    System.out.print(c[i]+" ");

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