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Java - merge two ArrayLists into one
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In this article, we would like to show you how to merge two ArrayLists into one in Java.
Quick solution:
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myArrayList1.addAll(myArrayList2);In this example, we merge two ArrayLists into one using addAll() method.
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import java.util.*;2
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public class Example {4
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public static void main(String[] args) {6
List<String> letters1 = new ArrayList<>();7
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letters1.add("A");9
letters1.add("B");10
letters1.add("C");11
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List<String> letters2 = new ArrayList<>();13
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letters2.add("D");15
letters2.add("E");16
letters2.add("F");17
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letters1.addAll(letters2);19
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System.out.println(letters1);21
}22
}Output:
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[A, B, C, D, E, F]