图的深度优先搜索

发布一个k8s部署视频：https://edu.youkuaiyun.com/course/detail/26967

课程内容：各种k8s部署方式。包括minikube部署，kubeadm部署，kubeasz部署，rancher部署，k3s部署。包括开发测试环境部署k8s，和生产环境部署k8s。

腾讯课堂连接地址https://ke.qq.com/course/478827?taid=4373109931462251&tuin=ba64518

第二个视频发布  https://edu.youkuaiyun.com/course/detail/27109

腾讯课堂连接地址https://ke.qq.com/course/484107?tuin=ba64518

介绍主要的k8s资源的使用配置和命令。包括configmap，pod，service，replicaset，namespace，deployment，daemonset，ingress，pv，pvc，sc，role，rolebinding，clusterrole，clusterrolebinding，secret，serviceaccount，statefulset，job，cronjob，podDisruptionbudget，podSecurityPolicy,networkPolicy,resourceQuota，limitrange，endpoint，event，conponentstatus，node，apiservice，controllerRevision等。

第三个视频发布：https://edu.youkuaiyun.com/course/detail/27574

详细介绍helm命令，学习helm chart语法，编写helm chart。深入分析各项目源码，学习编写helm插件
————————————————------------------------------------------------------------------------------------------------------------------

 

package com.data.struct;

import java.util.Random;

public class Graphic {
	private Node[] list;
	private NodeArrayQueue queue;
	private int time=0;
	public Graphic(int v,int e){
		list=new Node[v];
		for(int i=0;i<v;i++){
			Node node=new Node();
			node.id=i;
			list[i]=node;
		}
		for(int i=0;i<e;i++){
			int v1=new Random().nextInt(v);
			int v2=new Random().nextInt(v);
			if(v1==v2){
				continue;
			}
			while(true){
				Node node=list[v1];
				boolean already=false;
				while(node.next!=null){
					if(node.next.id==v2){
						already=true;
						break;
					}
					node=node.next;
				}
				if(already==true){
					break;
				}
				Node ex=new Node();
				ex.id=v2;
				node.next=ex;
				break;
			}
		}
		queue=new NodeArrayQueue((v*(v-1)/2)+5);
	}
	
	public void depthFirstSearch(){
		for(int i=0;i<list.length;i++){
			if(list[i].color==Node.WHITE){
				dfsVisit(list[i]);
			}
		}
	}
	
	private void dfsVisit(Node node){
		time++;
		node.d=time;
		node.color=Node.GRAY;
		Node w=list[node.id];
		while(w.next!=null){
			if(list[w.next.id].color==Node.WHITE){
				list[w.next.id].color=Node.GRAY;
				list[w.next.id].parent=w;
				dfsVisit(list[w.next.id]);
			}
			w=w.next;
		}
		node.color=Node.BLACK;
		time++;
		node.f=time;
	}
	
	public void printDepth(Node v){
		Node s=list[0];
		if(v==s){
			System.out.print(s.id+"=>");
		}else if(v.parent==null){
			System.out.print(v.id+"=>");
		}else {
			printDepth(v.parent);
			System.out.print(v.id+"=>");
		}
	}
	
	public void print(){
		for(int i=0;i<list.length;i++){
			Node node=list[i];
			System.out.print(node.id+"=>");
			while(node.next!=null){
				System.out.print(node.next.id+"=>");
				node=node.next;
			}
			System.out.println();
		}
		
	}
	public void printAllDepth(){
		System.out.println("path");
		for(int i=0;i<list.length;i++){
			printDepth(list[i]);
			System.out.println();
		}
	}
	
	public static class Node{
		public static final int WHITE=1;
		public static final int BLACK=2;
		public static final int GRAY=3;
		private int id;
		private Node next;
		private int color=WHITE;
		private int d=Integer.MAX_VALUE;
		private Node parent;
		private int f;
	}
	public static void main(String[] args)throws Exception {
		Graphic g=new Graphic(5,30);
		g.print();
		g.depthFirstSearch();
		g.printAllDepth();
		
		
	}

}

上面程序有个bug，修改后如下：

 

package com.data.struct;

import java.util.Random;

public class GraphicDepthFirst {
	private Node[] list;
	private int time=0;
	public GraphicDepthFirst(int v,int e){
		list=new Node[v];
		for(int i=0;i<v;i++){
			Node node=new Node();
			node.id=i;
			list[i]=node;
		}
		for(int i=0;i<e;i++){
			int v1=new Random().nextInt(v);
			int v2=new Random().nextInt(v);
			if(v1==v2){
				continue;
			}
			while(true){
				Node node=list[v1];
				boolean already=false;
				while(node.next!=null){
					if(node.next.id==v2){
						already=true;
						break;
					}
					node=node.next;
				}
				if(already==true){
					break;
				}
				Node ex=new Node();
				ex.id=v2;
				node.next=ex;
				break;
			}
		}
	}
	
	public void depthFirstSearch(){
		for(int i=0;i<list.length;i++){
			if(list[i].color==Node.WHITE){
				dfsVisit(list[i]);
			}
		}
	}
	
	private void dfsVisit(Node node){
		time++;
		node.d=time;
		node.color=Node.GRAY;
		Node w=list[node.id];
		Node u=w;
		while(w.next!=null){
			if(list[w.next.id].color==Node.WHITE){
				list[w.next.id].color=Node.GRAY;
				list[w.next.id].parent=u;
				dfsVisit(list[w.next.id]);
			}
			w=w.next;
		}
		node.color=Node.BLACK;
		time++;
		node.f=time;
	}
	
	public void printDepth(Node v){
		Node s=list[0];
		if(v==s){
			System.out.print(s.id+"=>");
		}else if(v.parent==null){
			System.out.print(v.id+"=>");
		}else {
			printDepth(v.parent);
			System.out.print(v.id+"=>");
		}
	}
	
	public void print(){
		for(int i=0;i<list.length;i++){
			Node node=list[i];
			System.out.print(node.id+"=>");
			while(node.next!=null){
				System.out.print(node.next.id+"=>");
				node=node.next;
			}
			System.out.println();
		}
		
	}
	public void printAllDepth(){
		System.out.println("path");
		for(int i=0;i<list.length;i++){
			printDepth(list[i]);
			System.out.println();
		}
	}
	
	public static class Node{
		public static final int WHITE=1;
		public static final int BLACK=2;
		public static final int GRAY=3;
		private int id;
		private Node next;
		private int color=WHITE;
		private int d=Integer.MAX_VALUE;
		private Node parent;
		private int f;
	}
	public static void main(String[] args)throws Exception {
		GraphicDepthFirst g=new GraphicDepthFirst(5,30);
		g.print();
		g.depthFirstSearch();
		g.printAllDepth();
		
		
	}

}