How can I combine elements from different arrays in java?

Question

Suppose a={1,2,3} and b={4,5,6} and I want to return an array containing the middle elements of a and b, i.e., {2,5}. I tried to use "merge":

public int[] middleValueArray(int[] a, int[] b) {
 int[] both=merge(a[1],b[1]);
 return both;
}

This does not seem to work. Is there a simple way to approach this? Thanks!

the question is not clear. Do you want to just return two integers with the first being the middle of a, and the second being the middle of b? — Bojan Petkovic, Mar 30 '17 at 14:43
What do you mean by "does not seem to work"? Errors? Unexpected output? — slim, Mar 30 '17 at 14:54

score 1 · Answer 1 · answered Mar 30 '17 at 14:37

1

More general solution will be:

public int[] middleValueArray(int[] a, int[] b) {
    return new int[]{a[a.length/2], b[b.length/2]};
}

answered Mar 30 '17 at 14:37

Andremoniy

34,031
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score 0 · Accepted Answer · answered Mar 30 '17 at 14:35

0

you can do it like this:

public int[] middleValueArray(int[] a, int[] b) {
 int[] both=new int[]{a[1],b[1]};
 return both;
}

answered Mar 30 '17 at 14:35

Václav Struhár

1,739
13
21

score 0 · Answer 3 · answered Mar 30 '17 at 14:37

0

Use this:-

public int[] middleValueArray(int[] a, int[] b) {
     int[] both={a[1],b[1]};
     return both;
    }

answered Mar 30 '17 at 14:37

bit-shashank

887
11
27

score 0 · Answer 4 · answered Mar 30 '17 at 14:41

More general solution would be to convert it to list and then add list one by one..for example..

 import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.List;

    public class Main {
       public static void main(String args[]) {
          String a[] = { "A", "E", "I" };
          String b[] = { "O", "U" };
          List list = new ArrayList(Arrays.asList(a));
          list.addAll(Arrays.asList(b));
          Object[] c = list.toArray();
          System.out.println(Arrays.toString(c));
       }
    }

How can I combine elements from different arrays in java?

4 Answers4