Adding method that could play a sound file. No external libraries used.

Issue - iluwatar#108

src/main/java/media/PlaySoundSnippet.java

@@ -0,0 +1,52 @@
+package media;
+
+import javax.sound.sampled.*;
+import java.io.File;
+import java.io.IOException;
+
+/*
+ * 30 Seconds of Java code library
+ *
+ */
+public class PlaySoundSnippet {
+
+
+  /**
+   * Factorial. Works only for small numbers
+   *
+   * @param soundFile which needs to be played
+   * @throws IOException  if an I/O error occurs
+   * @throws UnsupportedAudioFileException if the file did not contain valid data of a recognized file type and format
+   * @throws LineUnavailableException  if a line cannot be opened because it is unavailable
+   */
+  public static void playSound(String soundFile) throws IOException, UnsupportedAudioFileException, LineUnavailableException {
+    File f = new File("./" + soundFile);
+    AudioInputStream audioIn = null;
+    Clip clip = null;
+
+    try {
+      audioIn = AudioSystem.getAudioInputStream(f.toURI().toURL());
+      clip = AudioSystem.getClip();
+      clip.open(audioIn);
+
+      clip.start();
+
+      FloatControl volume = (FloatControl)clip.getControl(FloatControl.Type.MASTER_GAIN);
+      volume.setValue(1.0f); // Reduce volume by 10 decibels.
+
+      clip.drain();
+
+    }
+     finally {
+      try {
+        clip.close();
+      }
+      catch (Exception exp) {
+        exp.printStackTrace();
+      }
+    }
+
+  }
+}
+
+

src/test/java/media/PlaySoundSnippetTest.java

@@ -0,0 +1,25 @@
+package media;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+/*
+ * Tests for 30 Seconds of Java code library
+ *
+ */
+class PlaySoundSnippetTest {
+  /**
+   * Tests for {@link PlaySoundSnippet#playSound(String)}.
+   */
+  @Test
+  void playSound() {
+    String filename = "media/file_example_WAV_1MG.wav";
+
+    assertDoesNotThrow(() -> {
+      PlaySoundSnippet.playSound(filename);
+    });
+
+  }
+
+}