图的创建及深度广度遍历的代码实现，基于的是邻接矩阵，图这里是无向图，并且两个顶点之间有连接则邻接矩阵非零，如果没有连接则为零
public class Graph {
//图的邻接矩阵形式
private int[][] edges;
private int num;//图的结点数量
private boolean[] visited ;//结点是否被访问过
private Vertex[] vertex ;
private int pre;//用来记录前一个访问的结点
public Graph(){
}
public void createGraph(){
Scanner in = new Scanner(System.in);
System.out.print("please input the info:");
String str = in.next();
String[] temp = str.split(",");
System.out.print(temp.length);
this.num = temp.length;
System.out.print(num);
visited = new boolean[num];
vertex = new Vertex[num];
for(int i=0;i<num;i++){
Vertex v = new Vertex(i,temp[i]);
vertex[i]=v;
visit(vertex[i]);
System.out.println();
}
edges = new int[num][num];
for(int i=0;i<num;i++){
for(int j=0;j<num;j++){
Scanner in1 = new Scanner(System.in);
System.out.print("input the value:");
int k = in1.nextInt();
/* System.out.print(k);*/
edges[i][j] =k;
}
}
}
public void visit(Vertex v){
if(v!=null){System.out.print(MessageFormat.format("结点序号为{0},结点信息为{1}", v.no,v.info));
System.out.println();
}
}
public void dFS(int i){
visit(vertex[i]);
visited[i]=true;
for(int j=i+1;j<num;j++){
if(!visited[j]&&edges[i][j]!=0){
dFS(j);
}
}
}
public void dFSTrave(){
//深度遍历是在邻接矩阵的基础上进行的
for(int i=0;i<num;i++){
visited[i]=false;//默认情况下所有顶点是没有被访问过的
}
for(int i=0;i<num;i++){
if(!visited[i]){//还需要考虑一个条件就是必须可达
dFS(i);
}
}
}
//广度遍历则需要使用数据结构队列
public void bFSTrave(){
for(int i=0;i<num;i++){
visited[i]=false;//默认情况下所有顶点是没有被访问过的
}
Vertex v=null;
Queue queue = new Queue(100);
for(int i=0;i<num;i++){
if(!visited[i]){
visit(vertex[i]);
visited[i]=true;
//访问完成后入队
queue.EnQueue(queue, vertex[i]);
while(!queue.isEmpty(queue)){
v = queue.DeQueue(queue);
if(v!=null){
int k = v.no;
for(int j=k+1;j<num;j++){
if(!visited[j]&&edges[k][j]!=0){
visit(vertex[j]);
visited[j]=true;
queue.EnQueue(queue, vertex[j]);
}
}
}
}
}
}
}
}
public class Vertex {
//图的顶点信息
public int no;//顶点的标号
public String info;//顶点的信息
public Vertex(int i,String info){
this.no = i;
this.info = info;
}
}public class Queue {
private static int maxSize=100;
private Vertex[] data;
private int front;
private int rear;
public static int getMaxSize() {
return maxSize;
}
public static void setMaxSize(int maxSize) {
Queue.maxSize = maxSize;
}
public Vertex[] getData() {
return data;
}
public void setData(Vertex[] data) {
this.data = data;
}
public int getFront() {
return front;
}
public void setFront(int front) {
this.front = front;
}
public int getRear() {
return rear;
}
public void setRear(int rear) {
this.rear = rear;
}
public Queue(int maxSize){
data = new Vertex[maxSize];
front = 0;
rear = 0;
}
public static boolean isEmpty(Queue q){
if (q.front==q.rear){
return true;
}
else return false;
}
public static void EnQueue(Queue q,Vertex node){
System.out.print(maxSize);
if((q.rear+1)%maxSize==q.front){
System.out.print("队列已经满了");
return;
}else{
q.data[q.rear]=node;
q.rear =( q.rear+1)%maxSize;
}
}
public static Vertex DeQueue(Queue q){
if(isEmpty(q)){
System.out.print("该队列为空");
return null;
}
else{
Vertex node = q.data[q.front];
q.front = (q.front+1)%maxSize;
return node;
}
}
}public class Client_Graph {
/**
* @param args
*/
public static void main(String[] args) {
Graph graph = new Graph();
graph.createGraph();
graph.dFSTrave();
graph.bFSTrave();
}
}输入格式为：a,b,c，d代表四个个顶点
输入矩阵：0 0 1 0
0 0 1 1
1 1 0 0
0 1 0 0
逐个输入
