Error While embed the video in Your website page

Error:-
Refused to display '<URL>' in a frame because it set 'X-Frame-Options' to 'sameorigin

Solution:-

if link is https://www.youtube.com/watch?v=8WkuChVeL0s

than,replaced watch?v= with embed/ so the valid link will be: https://www.youtube.com/embed/8WkuChVeL0s

It works well.

Exception in thread "main" org.hibernate.NonUniqueObjectException: A different object with the same identifier value was already associated with the session : [com.dreainno.hibernate.demo.entity.Student#0]

Solution:-

In the hibernate entity class we have to define genertion type strategy of id column. For example we have id column as autoincremented in sql table that will define in hibernate entity class as below:-

@Id
@GeneratedValue(strategy=GenerationType.IDENTITY)
@Column(name="id")
private int id;

 I hope your error will be solve.
Happy Coding

Spring Error display on front end :- Failed to convert property value of type java.lang.String to required type int for property freePasses; nested exception is java.lang.NumberFormatException: For input string: ""

Solution:-


This error is occurred because we are applying @NotNull annotation on int feild so we have to change that field into Integer to solve the error.

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'testingController' method public java.lang.String com.dreainno.mvc.TestingController.showForm() to { /showForm}: There is already 'helloWorldController' bean method public java.lang.String com.dreainno.mvc.HelloWorldController.showForm() mapped.

Error:-

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping': Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map 'testingController' method 
public java.lang.String com.dreainno.mvc.TestingController.showForm()
to { /showForm}: There is already 'helloWorldController' bean method
public java.lang.String com.dreainno.mvc.HelloWorldController.showForm() mapped.
 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1778)
 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:593)
 org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
 org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
 org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
 org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
 org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
 org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845)
 org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
 org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
 org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:701)
 org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:667)
 org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:715)
 org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:590)
 org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:529)
 org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:169)
 javax.servlet.GenericServlet.init(GenericServlet.java:158)
 org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
 org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
 org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
 org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
 org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
 org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
 org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
 java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
 java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
 org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
 java.lang.Thread.run(Unknown Source)

Solution:-

This error will occurred when the same mapping caught by spring controller to more than on method throughtout application.

In This sitution you have to given request mapping to controller and when calling method append controller mapping also.

In simple words you have two methods in different controller and you have the mention controller mapping in url

For example

<form action="hello/processFormVersion3" method="post">

In above example hello is controller request mapping parameter and processFormVersion3 is the methods request mapping

More than one fragment with the name [spring_web] was found. This is not legal with relative ordering. See section 8.2.2 2c of the Servlet specification for details. Consider using absolute ordering.

Error In Spring Application

More than one fragment with the name [spring_web] was found. This is not legal with relative ordering. See section 8.2.2 2c of the Servlet specification for details. Consider using absolute ordering.

Solution:-

Just Keep Only Spring-web-5.1.8 RELEASE.jar in lib folder  and remove Just Keep Only Spring-web-5.1.8 RELEASE-javadoc.jar  Just Keep Only Spring-web-5.1.8 RELEASE.-sources.jar .

This will solve the error in web application. it will occurred because there program will find multiple spring-web.jar in lib folder

Hope Your Error will solve.
Happy Coding

ERROR:-org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type

ERROR:-
Apr 10, 2020 12:56:45 PM org.springframework.context.support.AbstractApplicationContext refresh
WARNING: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'tennisCoach': Unsatisfied dependency expressed through field 'fortuneService'; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.dreainno.springdemo.FortuneService' available: expected single matching bean but found 2: happyFortuneService,randomFortuneService
Exception in thread "main" org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'tennisCoach': Unsatisfied dependency expressed through field 'fortuneService'; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.dreainno.springdemo.FortuneService' available: expected single matching bean but found 2: happyFortuneService,randomFortuneService
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:596)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:90)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessProperties(AutowiredAnnotationBeanPostProcessor.java:374)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1411)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:592)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:515)
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:845)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:877)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:144)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:85)
at com.dreainno.springdemo.AnnotaationDemo.main(AnnotaationDemo.java:10)
Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.dreainno.springdemo.FortuneService' available: expected single matching bean but found 2: happyFortuneService,randomFortuneService
at org.springframework.beans.factory.config.DependencyDescriptor.resolveNotUnique(DependencyDescriptor.java:221)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1229)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1171)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:593)
... 15 more


Solution:-

When We Use @Autowired and we have multiple implentation of that class simply use the @Qualifier and mention the bean id For Example:-

@Autowired
@Qualifier("happyFortuneService")

private FortuneService fortuneService;

It will solve the error. Thanking You. Happy Coding

Day 11: 2D Arrays :30 Days Of Code HackerRank Solution in java

Problem:-

Objective
Today, we're building on our knowledge of Arrays by adding another dimension. Check out the Tutorial tab for learning materials and an instructional video!

Context
Given a  2D Array, :

1 1 1 0 0 0
0 1 0 0 0 0
1 1 1 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0

We define an hourglass in  to be a subset of values with indices falling in this pattern in 's graphical representation:

a b c
  d
e f g

There are  hourglasses in , and an hourglass sum is the sum of an hourglass' values.

Task
Calculate the hourglass sum for every hourglass in , then print the maximum hourglass sum.

Input Format

There are  lines of input, where each line contains  space-separated integers describing 2D Array ; every value in  will be in the inclusive range of  to .

Constraints

Output Format

Print the largest (maximum) hourglass sum found in .

Sample Input

1 1 1 0 0 0
0 1 0 0 0 0
1 1 1 0 0 0
0 0 2 4 4 0
0 0 0 2 0 0
0 0 1 2 4 0

Sample Output

19

Explanation

 contains the following hourglasses:

1 1 1   1 1 0   1 0 0   0 0 0
  1       0       0       0
1 1 1   1 1 0   1 0 0   0 0 0

0 1 0   1 0 0   0 0 0   0 0 0
  1       1       0       0
0 0 2   0 2 4   2 4 4   4 4 0

1 1 1   1 1 0   1 0 0   0 0 0
  0       2       4       4
0 0 0   0 0 2   0 2 0   2 0 0

0 0 2   0 2 4   2 4 4   4 4 0
  0       0       2       0
0 0 1   0 1 2   1 2 4   2 4 0

The hourglass with the maximum sum () is:

2 4 4
  2
1 2 4

Solution:-

import java.io.*;

import java.math.*;

import java.security.*;

import java.text.*;

import java.util.*;

import java.util.concurrent.*;

import java.util.regex.*;

public class Solution {

    private static final Scanner scanner = new Scanner(System.in);

    public static void main(String[] args) {

        int[][] arr = new int[6][6];

        for (int i = 0; i < 6; i++) {

            String[] arrRowItems = scanner.nextLine().split(" ");

            scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

            for (int j = 0; j < 6; j++) {

                int arrItem = Integer.parseInt(arrRowItems[j]);

                arr[i][j] = arrItem;

            }

        }

        scanner.close();

        int max=-70;

        int sum=0;

        for(int i=0;i<4;i++){

            for(int j=0;j<4;j++){

                sum=arr[i][j]+arr[i][j+1]+arr[i][j+2]+arr[i+1][j+1]+arr[i+2][j]+arr[i+2]                       [j+1]+arr[i+2][j+2];

                if(sum>max){

                    max=sum;

                }

                sum=0;

            }

        }

        System.out.println(max);

    }

}

Output:-