This Java program,represents a given graph in the form of Adjacency list.
Here is the source code of the Java program to display a linked list in reverse. The Java program is successfully compiled and run on a Linux system. The program output is also shown below.
import java.util.HashMap; import java.util.InputMismatchException; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Scanner; public class GraphAdjacencyList { /* Makes use of Map collection to store the adjacency list for each vertex.*/ private Map<Integer, List<Integer>> Adjacency_List; /* * Initializes the map to with size equal to number of vertices in a graph * Maps each vertex to a given List Object */ public GraphAdjacencyList(int number_of_vertices) { Adjacency_List = new HashMap<Integer, List<Integer>>(); for (int i = 1 ; i <= number_of_vertices ; i++) { Adjacency_List.put(i, new LinkedList<Integer>()); } } /* Adds nodes in the Adjacency list for the corresponding vertex */ public void setEdge(int source , int destination) { if (source > Adjacency_List.size() || destination > Adjacency_List.size()) { System.out.println("the vertex entered in not present "); return; } List<Integer> slist = Adjacency_List.get(source); slist.add(destination); List<Integer> dlist = Adjacency_List.get(destination); dlist.add(source); } /* Returns the List containing the vertex joining the source vertex */ public List<Integer> getEdge(int source) { if (source > Adjacency_List.size()) { System.out.println("the vertex entered is not present"); return null; } return Adjacency_List.get(source); } /* * Main Function reads the number of vertices and edges in a graph. * then creates a Adjacency List for the graph and prints it */ public static void main(String...arg) { int source , destination; int number_of_edges,number_of_vertices; int count = 1; Scanner scan = new Scanner(System.in); try { /* Read the number of vertices and edges in graph */ System.out.println("Enter the number of vertices and edges in graph"); number_of_vertices = scan.nextInt(); number_of_edges = scan.nextInt(); GraphAdjacencyList adjacencyList = new GraphAdjacencyList(number_of_vertices); /* Reads the edges present in the graph */ System.out.println("Enter the edges in graph Format : <source index> <destination index>"); while (count <= number_of_edges) { source = scan.nextInt(); destination = scan.nextInt(); adjacencyList.setEdge(source, destination); count++; } /* Prints the adjacency List representing the graph.*/ System.out.println ("the given Adjacency List for the graph \n"); for (int i = 1 ; i <= number_of_vertices ; i++) { System.out.print(i+"->"); List<Integer> edgeList = adjacencyList.getEdge(i); for (int j = 1 ; ; j++ ) { if (j != edgeList.size()) { System.out.print(edgeList.get(j - 1 )+"->"); }else { System.out.print(edgeList.get(j - 1 )); break; } } System.out.println(); } } catch(InputMismatchException inputMismatch) { System.out.println("Error in Input Format. \nFormat : <source index> <destination index>"); } scan.close(); } }
$javac GraphAdjacencyList.java $java GraphAdjacencyList Enter the number of vertices and edges in graph 4 5 Enter the edges in graph Format : <source index> <destination index> 1 2 2 3 3 4 4 1 1 3 the given Adjacency List for the graph 1->2->4->3 2->1->3 3->2->4->1 4->3->1
Related posts:
Running Spring Boot Applications With Minikube
Guide to Selenium with JUnit / TestNG
Creating a Custom Starter with Spring Boot
Java Switch Statement
Consuming RESTful Web Services
Java Program to Find the Median of two Sorted Arrays using Binary Search Approach
Java Program to Construct an Expression Tree for an Infix Expression
Hướng dẫn Java Design Pattern – Strategy
Control Structures in Java
Java – Rename or Move a File
Guide to Escaping Characters in Java RegExps
Guide to the Volatile Keyword in Java
Java Program to Implement AVL Tree
Xây dựng ứng dụng Client-Server với Socket trong Java
Giới thiệu thư viện Apache Commons Chain
Setting Up Swagger 2 with a Spring REST API
Jackson JSON Views
Receive email using POP3
Convert Hex to ASCII in Java
Entity To DTO Conversion for a Spring REST API
Using Custom Banners in Spring Boot
Spring Boot - Admin Server
Converting Between a List and a Set in Java
Introduction to Spring Cloud CLI
Java Program to Check whether Graph is a Bipartite using 2 Color Algorithm
Auditing with JPA, Hibernate, and Spring Data JPA
How to Set TLS Version in Apache HttpClient
Easy Ways to Write a Java InputStream to an OutputStream
Spring Boot - Tomcat Port Number
Java Program to Perform Naive String Matching
Hướng dẫn sử dụng Java Reflection
Merging Streams in Java