java/DFS: Move file to algorithms directory, cleanup

1 files changed, 71 insertions, 0 deletions

diff --git a/algorithms/java/DFS.java b/algorithms/java/DFS.java
new file mode 100644
index 0000000..5357a7d
--- /dev/null
+++ b/algorithms/java/DFS.java
@@ -0,0 +1,71 @@
+public class CG_pathfinder {
+    static int paths = 0;
+
+    private static final int[][] dir = new int[][]{
+        {0, 1}, //right
+        {1, 0}, //down
+        {0, -1}, //left
+        {-1, 0} //up
+    };
+
+    static void traverse(int x, int y, char[][] maze, boolean[][] visited) {
+        int curx;
+        int cury;
+        for (int i = 0; i < 4; i++) {
+            curx = x;
+            cury = y;
+
+            curx += dir[i][0];
+            cury += dir[i][1];
+
+            if (curx < 0 || cury < 0
+                || curx > maze.length - 1 || cury > maze.length - 1)
+                continue; //optional?       //for square mazes
+
+            if (maze[curx][cury] == '$') {
+                System.out.println("Path Found");
+                paths++;
+                for(int k = 0; k < maze.length; k++) {
+                    for(int j = 0; j < maze.length; j++)
+                        System.out.print(visited[k][j]);
+                    System.out.println();
+                }
+            } else if (maze[curx][cury] == 'x' || visited[curx][cury])
+                continue;
+            else if (maze[curx][cury] == '_') {
+                visited[curx][cury] = true;
+                traverse(curx, cury, maze, visited);
+                visited[curx][cury] = false;
+            }
+        }
+    }
+
+    public static void main(String[] args) {
+        char[][] maze = {
+            {'*', '#', 'x'},
+            {'_', '_', '_'},
+            {'_', '_', '$'}
+        };
+        int[] start = {0, 0};
+
+        System.out.println("Solving for the maze: ");
+        boolean[][] visited = new boolean[maze.length][maze.length];
+
+        for (int i = 0; i<maze.length; i++){
+            for (int j = 0; j<maze[i].length; j++)
+                System.out.print(maze[i][j] + " "); // Printing maze
+            System.out.println("");
+        }
+
+        for (int i = 0; i< maze.length; i++)
+            for (int j = 0; j<maze.length; j++)
+                visited[i][j] = false;
+
+        visited[0][0] = true;
+        traverse(start[0], start[1], maze, visited);
+        if (paths == 0)
+            System.out.println("no paths found");
+        else
+            System.out.println(paths);
+    }
+}