style: enable RedundantModifier in checkstyle (#5140)

src/main/java/com/thealgorithms/datastructures/graphs/A_Star.java

@@ -14,7 +14,7 @@ public class A_Star {
         private ArrayList<ArrayList<Edge>> graph;
 
         // Initialise ArrayLists in Constructor
-        public Graph(int size) {
+        Graph(int size) {
             this.graph = new ArrayList<>();
             for (int i = 0; i < size; i++) {
                 this.graph.add(new ArrayList<>());
@@ -38,7 +38,7 @@ public class A_Star {
         private int to;
         private int weight;
 
-        public Edge(int from, int to, int weight) {
+        Edge(int from, int to, int weight) {
             this.from = from;
             this.to = to;
             this.weight = weight;
@@ -64,7 +64,7 @@ public class A_Star {
         private ArrayList<Integer> path; // list of visited nodes in this path.
         private int estimated; // heuristic value associated to the last node od the path (current node).
 
-        public PathAndDistance(int distance, ArrayList<Integer> path, int estimated) {
+        PathAndDistance(int distance, ArrayList<Integer> path, int estimated) {
             this.distance = distance;
             this.path = path;
             this.estimated = estimated;

src/main/java/com/thealgorithms/datastructures/graphs/BellmanFord.java

@@ -31,7 +31,7 @@ class BellmanFord /*
          * @param v End vertex
          * @param c Weight
          */
-        public Edge(int a, int b, int c) {
+        Edge(int a, int b, int c) {
             u = a;
             v = b;
             w = c;

src/main/java/com/thealgorithms/datastructures/graphs/ConnectedComponent.java

@@ -15,7 +15,7 @@ class Graph<E extends Comparable<E>> {
 
         E name;
 
-        public Node(E name) {
+        Node(E name) {
             this.name = name;
         }
     }
@@ -24,7 +24,7 @@ class Graph<E extends Comparable<E>> {
 
         Node startNode, endNode;
 
-        public Edge(Node startNode, Node endNode) {
+        Edge(Node startNode, Node endNode) {
             this.startNode = startNode;
             this.endNode = endNode;
         }
@@ -33,7 +33,7 @@ class Graph<E extends Comparable<E>> {
     ArrayList<Edge> edgeList;
     ArrayList<Node> nodeList;
 
-    public Graph() {
+    Graph() {
         edgeList = new ArrayList<Edge>();
         nodeList = new ArrayList<Node>();
     }

src/main/java/com/thealgorithms/datastructures/graphs/Cycles.java

@@ -10,7 +10,7 @@ class Cycle {
     private boolean[] visited;
     ArrayList<ArrayList<Integer>> cycles = new ArrayList<ArrayList<Integer>>();
 
-    public Cycle() {
+    Cycle() {
         Scanner in = new Scanner(System.in);
         System.out.print("Enter the no. of nodes: ");
         nodes = in.nextInt();

src/main/java/com/thealgorithms/datastructures/graphs/Graphs.java

@@ -6,7 +6,7 @@ class AdjacencyListGraph<E extends Comparable<E>> {
 
     ArrayList<Vertex> vertices;
 
-    public AdjacencyListGraph() {
+    AdjacencyListGraph() {
         vertices = new ArrayList<>();
     }
 
@@ -15,7 +15,7 @@ class AdjacencyListGraph<E extends Comparable<E>> {
         E data;
         ArrayList<Vertex> adjacentVertices;
 
-        public Vertex(E data) {
+        Vertex(E data) {
             adjacentVertices = new ArrayList<>();
             this.data = data;
         }

src/main/java/com/thealgorithms/datastructures/graphs/Kruskal.java

@@ -23,7 +23,7 @@ public class Kruskal {
         private int to;
         private int weight;
 
-        public Edge(int from, int to, int weight) {
+        Edge(int from, int to, int weight) {
             this.from = from;
             this.to = to;
             this.weight = weight;

src/main/java/com/thealgorithms/datastructures/graphs/MatrixGraphs.java

@@ -68,7 +68,7 @@ class AdjacencyMatrixGraph {
     /**
      * Constructor
      */
-    public AdjacencyMatrixGraph(int givenNumberOfVertices) {
+    AdjacencyMatrixGraph(int givenNumberOfVertices) {
         this.setNumberOfVertices(givenNumberOfVertices);
         this.setNumberOfEdges(0);
         this.setAdjacency(new int[givenNumberOfVertices][givenNumberOfVertices]);