add a simple Java File IO example

Author: fishercoder1534

src/main/java/IO_example/JavaFileIOExample.java

@@ -0,0 +1,29 @@
+package IO_example;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Scanner;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class JavaFileIOExample {
+
+    public static void main(String... args) throws IOException {
+        System.out.println("Program started.");
+        readFileOnDisk();
+        System.out.println("Program finished.");
+    }
+
+    private static void readFileOnDisk() throws IOException {
+        String file = "src/test/resources/sample_input.txt";
+        Scanner scanner = new Scanner(new File(file));
+        scanner.useDelimiter(" ");
+
+        assertTrue(scanner.hasNext());
+        while (scanner.hasNext()) {
+            System.out.println(scanner.next());
+        }
+
+        scanner.close();
+    }
+}

src/test/resources/sample_input.txt

@@ -0,0 +1 @@
+cool test it is