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How to merge two arrays in Java

How to merge two arrays?

This example shows how to merge two arrays into a single array by the use of list.Addall(array1.asList(array2) method of List class and Arrays.toString () method of Array class.

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));
   }
}

The above code sample will produce the following result.

[A, E, I, O, U]

Another sample example of Arrays Merge.

public class HelloWorld {
   public static void main(String[] args) {
      int[]a = {1,2,3,4};
      int[]b = {4,16,1,2,3,22};
      int[]c = new int[a.length+b.length];
      int count = 0;
      
      for(int i = 0; i < a.length; i++) { 
         c[i] = a[i];
         count++;
      } 
      for(int j = 0; j < b.length;j++) { 
         c[count++] = b[j];
      } 
      for(int i = 0;i < c.length;i++) System.out.print(c[i]+" ");
   } 
}

The above code sample will produce the following result.

1,2,3,4,4,16,1,2,3,22

java_arrays.htm

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