package Day2; import java.util.Scanner; public class StringCheck { public static void main(String[] args) { String[] messages = { "いまなにしてる", "何も入力されていません", "投稿文が長すぎます", "↓↓↓↓↓↓ 投稿されました ↓↓↓↓↓↓" }; Scanner scan = new Scanner(System.in); String str = ""; //int maxLength = 140; // 段階1: 無限ループ化 while (true) { System.out.println(messages[0]); str = scan.nextLine().trim(); //System.out.println("あなたの入力は: [" + str + "]"); //2段階のif boolean isEmpty = str.isEmpty(); boolean isTooLong = str.length() > 140; if(isEmpty) { System.out.println(messages[1]); continue; } //(Length check) 140 under if (isTooLong) { System.out.println(messages[2]); continue; } break; } System.out.println(); System.out.println(messages[3]); System.out.println(str); scan.close(); } }