[java] 配列を検索する

●配列を検索する
binarySearch()

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import static java.util.Arrays.binarySearch;
public class binarySearchDemo {
    public static void main(String[] args){
        int[] array = new int[]{10, 20, 30, 40, 50};

        int index = binarySearch(array, 20);
        System.out.println("20は" + (index + 1) + "番目にあります");
        index = binarySearch(array, 100);
        if(index < 0){
            System.out.println("100は存在しません");
        }else{
            System.out.println("100は" + (index + 1) + "番目にあります");
        }
    }
}
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