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Java - sum all ArrayList elements
3 points
In this article, we would like to show you how to sum all the elements from ArrayList in Java.
Quick solution:
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List<Integer> numbers = new ArrayList<>();2
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int sum = 0;4
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for (int number : numbers){6
sum += number;7
}
In this example, we add the value of each number from numbers ArrayList to the sum variable.
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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
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List<Integer> numbers = new ArrayList<>();8
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numbers.add(1);10
numbers.add(2);11
numbers.add(3);12
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int sum = 0;14
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for (int number : numbers){16
sum += number;17
}18
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System.out.println(sum);20
}21
}Output:
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