Use interruptible readLine

example/pom.xml

@@ -26,7 +26,7 @@
 		<dependency>
 			<groupId>it.tdlight</groupId>
 			<artifactId>tdlight-java</artifactId>
-			<version>2.7.8.35</version>
+			<version>2.7.8.36</version>
 		</dependency>
 
 		<!-- TDLight natives -->

src/main/java/it/tdlight/common/utils/ScannerUtils.java

@@ -1,27 +1,59 @@
 package it.tdlight.common.utils;
 
 import java.io.Console;
-import java.util.Scanner;
-import java.util.concurrent.atomic.AtomicReference;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 public final class ScannerUtils {
 
-	private static final Object lock = new Object();
-	private static Scanner SCANNER = null;
+	private static final Object LOCK = new Object();
+	private static InputStreamReader scanner = null;
 
 	public static String askParameter(String displayName, String question) {
-		Console console = System.console();
-		if (console != null) {
-			return console.readLine("[%s] %s", displayName, question);
-		} else {
-			synchronized (lock) {
-				if (SCANNER == null) {
-					SCANNER = new Scanner(System.in);
-					Runtime.getRuntime().addShutdownHook(new Thread(() -> SCANNER.close()));
+		synchronized (LOCK) {
+			Console console = System.console();
+			if (console != null) {
+				return console.readLine("[%s] %s", displayName, question);
+			} else {
+				if (scanner == null) {
+					scanner = new InputStreamReader(System.in);
+				}
+				System.out.printf("[%s] %s: ", displayName, question);
+				try {
+					return interruptibleReadLine(scanner);
+				} catch (InterruptedException | IOException e) {
+					throw new RuntimeException(e);
 				}
 			}
-			System.out.printf("[%s] %s: ", displayName, question);
-			return SCANNER.nextLine();
 		}
 	}
+
+	/**
+	 * https://stackoverflow.com/questions/3595926/how-to-interrupt-bufferedreaders-readline
+	 */
+	private static String interruptibleReadLine(Reader reader) throws InterruptedException, IOException {
+		Pattern line = Pattern.compile("^(.*)\\R");
+		Matcher matcher;
+		boolean interrupted;
+
+		StringBuilder result = new StringBuilder();
+		int chr = -1;
+		do {
+			if (reader.ready()) {
+				chr = reader.read();
+			}
+			if (chr > -1) {
+				result.append((char) chr);
+			}
+			matcher = line.matcher(result.toString());
+			interrupted = Thread.interrupted(); // resets flag, call only once
+		} while (!interrupted && !matcher.matches());
+		if (interrupted) {
+			throw new InterruptedException();
+		}
+		return (matcher.matches() ? matcher.group(1) : "");
+	}
 }