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【java】ArrayList(コレクション)での要素数の取得

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import java.util.ArrayList;

public class Main {
    public static void main(String... args) {
        ArrayList<String> fruits = new ArrayList<>();

        fruits.add("apple");
        fruits.add("melon");
        fruits.add("lemon");

        System.out.println(fruits.size());
    }
}

出力はこうなる

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