all tasks

Task/Walk-a-directory-Recursively/Java/walk-a-directory-recursively-1.java

@@ -0,0 +1,29 @@
+import java.io.File;
+
+public class MainEntry {
+    public static void main(String[] args) {
+        walkin(new File("/home/user")); //Replace this with a suitable directory
+    }
+
+    /**
+     * Recursive function to descend into the directory tree and find all the files
+     * that end with ".mp3"
+     * @param dir A file object defining the top directory
+     **/
+    public static void walkin(File dir) {
+        String pattern = ".mp3";
+
+        File listFile[] = dir.listFiles();
+        if (listFile != null) {
+            for (int i=0; i<listFile.length; i++) {
+                if (listFile[i].isDirectory()) {
+                    walkin(listFile[i]);
+                } else {
+                    if (listFile[i].getName().endsWith(pattern)) {
+                        System.out.println(listFile[i].getPath());
+                    }
+                }
+            }
+        }
+    }
+}

Task/Walk-a-directory-Recursively/Java/walk-a-directory-recursively-2.java

@@ -0,0 +1,19 @@
+import java.io.IOException;
+import java.nio.file.*;
+import java.nio.file.attribute.BasicFileAttributes;
+
+public class WalkTree {
+	public static void main(String[] args) throws IOException {
+		Path start = FileSystems.getDefault().getPath("/path/to/file");
+		Files.walkFileTree(start, new SimpleFileVisitor<Path>() {
+			@Override
+			public FileVisitResult visitFile(Path file,
+					BasicFileAttributes attrs) throws IOException {
+				if (file.toString().endsWith(".mp3")) {
+					System.out.println(file);
+				}
+				return FileVisitResult.CONTINUE;
+			}
+		});
+	}
+}