BAEL-6465: How to handle NoSuchElementException when reading a file through a Scanner ? (#13999)

core-java-modules/core-java-io-apis-2/src/main/java/com/baeldung/scanner/ScannerNoSuchElementException.java

@@ -0,0 +1,58 @@
+package com.baeldung.scanner;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.NoSuchElementException;
+import java.util.Scanner;
+
+public class ScannerNoSuchElementException {
+
+    public static String readFileV1(String pathname) throws IOException {
+        Path pathFile = Paths.get(pathname);
+        if (Files.notExists(pathFile)) {
+            return "";
+        }
+
+        try (Scanner scanner = new Scanner(pathFile)) {
+            return scanner.nextLine();
+        }
+    }
+
+    public static String readFileV2(String pathname) throws IOException {
+        Path pathFile = Paths.get(pathname);
+        if (Files.notExists(pathFile)) {
+            return "";
+        }
+
+        try (Scanner scanner = new Scanner(pathFile)) {
+            return scanner.hasNextLine() ? scanner.nextLine() : "";
+        }
+    }
+
+    public static String readFileV3(String pathname) throws IOException {
+        Path pathFile = Paths.get(pathname);
+        if (Files.notExists(pathFile) || Files.size(pathFile) == 0) {
+            return "";
+        }
+
+        try (Scanner scanner = new Scanner(pathFile)) {
+            return scanner.nextLine();
+        }
+    }
+
+    public static String readFileV4(String pathname) throws IOException {
+        Path pathFile = Paths.get(pathname);
+        if (Files.notExists(pathFile)) {
+            return "";
+        }
+
+        try (Scanner scanner = new Scanner(pathFile)) {
+            return scanner.nextLine();
+        } catch (NoSuchElementException exception) {
+            return "";
+        }
+    }
+
+}