Saturday, May 9, 2015

How to add two array in java.

Step 1- Create two array

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String a0[] = { "A", "E", "I" };
String b0[] = { "O", "U" };

Step 2- Convert these arrays into List

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List a1 = new ArrayList(Arrays.asList(a0));
List b1 = new ArrayList(Arrays.asList(b0));


Step 3- Add second List into first List into resultant third List

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a1.addAll(b1);

Step 4- Convert the third list into Array.

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Object[] c = a1.toArray();

Example –

AddTwoArray.java


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package com.atozjavatutorials;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class AddTwoArray {
    public static void main(String arg[]){         
        String a0[] = { "A", "E", "I" };
        String b0[] = { "O", "U" };
        List a1 = new ArrayList(Arrays.asList(a0));
        List b1 = new ArrayList(Arrays.asList(b0));
        a1.addAll(b1);
        Object[] c = a1.toArray();
        //System.out.println(a1);
        for (int i = 0; i < c.length; i++) {
            System.out.println(c[i]);
        }
    }
}

Output:
A
E
I
O
U

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