段階４です

PJ/src/StringCheck.java

@@ -0,0 +1,44 @@
+import java.util.Scanner;
+
+public class StringCheck {
+
+	public static void main(String[] args) {
+		String[] message = new String[4];
+		message[0] = "いまなにしてる？";
+		message[1] = "何も入力されていません";
+		message[2] = "投稿文が長すぎます";
+		message[3] = "↓↓↓↓↓↓　投稿されました　↓↓↓↓↓↓";
+
+		//System.out.println(message[2]);
+
+		//		for (int i = 0; i < message.length; i++) {
+		//			System.out.println(message[i]);
+		//		}
+
+		while (true) {
+			Scanner scanner = new Scanner(System.in);
+			System.out.println(message[0]);
+			String str = scanner.nextLine().strip();
+
+			int strlen = str.length();
+			boolean isEmpty = strlen == 0;
+			boolean isOver = ((140 - strlen) < 0);
+
+			if (isEmpty == true) {
+				System.out.println(message[1]);
+				continue;
+			}
+			
+			if (isOver == true) {
+				System.out.println(message[2]);
+				continue;
+			} 
+			
+			{
+				System.out.println("");
+				System.out.println(message[3]);
+				System.out.println(str);				
+			} break;
+		}
+	}
+}