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文字列の一致方法をJavaで実装しました

import java.util.Scanner

public class Mojikensaku1 {
   public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        System.out.println("検索する文字を入力してください");
        String line1 = sc.nextLine();
        System.out.println("判定する文字を入力してください");
        String line2 = sc.nextLine();
        //文字列検索結果フラグの定義
        booloean flag1 = true;
        //文字列検索チェック
        flag1 = line2.contains(line1);
        //文字列が含まれているかチェック ある場合は「DANGER」ない場合は「OK」
        if (flag1 == true) {
            System.out.println("DANGER");
        } else {
            System.out.println("OK");
        }

        sc.close();
   }
}

containsメソッドを使って文字列検索をしています。

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