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  1. import java.util.HashMap;
  2. import java.io.IOException;
  3. import java.nio.file.Files;
  4. import java.nio.file.Path;
  5. import java.nio.file.Paths;
  6. import java.util.Scanner;
  7.  
  8. class Foo {
  9.     Path file;
  10.  
  11.     public Foo(Path file) {
  12.         this.file = file;
  13.     }
  14.  
  15.     public Boolean baz(String arg) {
  16.         Boolean b = false;
  17.         try {
  18.             b = Files.lines(this.file).anyMatch(s -> s.equals(arg));
  19.         } catch(IOException ioex) {
  20.             ioex.printStackTrace();
  21.         }
  22.         return b;
  23.     }
  24. }
  25.  
  26. public class Main {
  27.     public static void main(String[] args) {
  28.         HashMap<Boolean, String> msg = new HashMap<Boolean, String>();
  29.         msg.put(true, "入場できます");
  30.         msg.put(false, "入場できません");
  31.         Path file = Paths.get("name.txt");
  32.         Foo bar = new Foo(file);
  33.         System.out.println("名前を入力してください");
  34.         Scanner scan = new Scanner(System.in);
  35.         String str = scan.next();
  36.         System.out.println(msg.get(bar.baz(str)));
  37.     }
  38. }
  39.  
Runtime error #stdin #stdout #stderr 0.13s 49312KB
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stdin
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Standard input is empty
stdout
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名前を入力してください
stderr
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Exception in thread "main" java.util.NoSuchElementException
	at java.base/java.util.Scanner.throwFor(Scanner.java:937)
	at java.base/java.util.Scanner.next(Scanner.java:1478)
	at Main.main(Main.java:35)
https://ideone.com/jwKiY4
language:
Java (12.0.1)
created:
1 year ago
visibility:
public

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