Is it allowed to have two methods appearing in the same class with the same method name and the same formal parameter list?

In a class, there can be several methods with the same name. However they must have a different signature. The signature of a method is comprised of its name, its parameter types and the order of its parameters.

Can we have multiple RequestMapping with same URL pattern?

The params element of the @RequestMapping annotation further helps to narrow down request mapping. Using the params element, you can have multiple handler methods handling requests to the same URL, but with different parameters.

What are the possible parameters that can be passed to the business logic method that is annotated with @RequestMapping in controller class?

Using @RequestMapping with HTTP Method annotation is capable of handling HTTP request methods, such as GET, PUT, POST, DELETE, and PATCH. By default all requests are assumed to be of HTTP GET type.

Can you have 2 methods with the same name?

Yes, we can define multiple methods in a class with the same name but with different types of parameters. Depending on the parameters, the appropriate method will be called.

Can we have two methods in a class with the same name explain with example?

For convenience, Java allows you to write more than one method in the same class definition with the same name. For example, you can have two methods in ShoppingCart class named computeCost. Having two or more methods named the same in the same class is called overloading.

Can you define two methods in the same class with the same name and parameter list?

The actual parameters of a method must match the formal parameters in type, order, and number. You can define two methods in the same class with the same name and parameter list.

What is difference between @GetMapping and @RequestMapping?

Generally, @requestmapping is seen as a class-level annotation. This feature differentiates getmapping and requestmapping annotation from each other. It can be considered as an annotation that acts as a shortcut of requestmapping annotation. Getmapping requests handler paths onto specific handler methods.

What is the difference between PathVariable and RequestParam?

The key difference between @RequestParam and @PathVariable is that @RequestParam used for accessing the values of the query parameters where as @PathVariable used for accessing the values from the URI template.

Where @autowired can be used?

The @Autowired annotation can be used to autowire bean on the setter method just like @Required annotation, constructor, a property or methods with arbitrary names and/or multiple arguments.

What tells Spring what method to execute when processing a request?

Spring has always supported using XML to define the objects that Spring should instantiate, and in that case there was an ‘init-method attribute that could be used to specify the method. Obviously in that case it still needed reflection to actually look up and call the method.

Is it possible for a method to have multiple parameters?

if the number of parameters and their types is same but order is different then it is possible since it results in method overloading. It means if the method signature is same which includes method name with number of parameters and their types and the order they are defined.

Can two methods have the same parameter types but different return types?

If both methods have same parameter types, but different return type than it is not possible. From Java Language Specification, Java SE 8 Edition, §8.4.2. Method Signature:

What is the difference between a parameter and a first name?

When the method is called, we pass along a first name, which is used inside the method to print the full name: When a parameter is passed to the method, it is called an argument. So, from the example above: fname is a parameter, while Liam, Jenny and Anja are arguments.

How do I add parameters to a method?

Parameters act as variables inside the method. Parameters are specified after the method name, inside the parentheses. You can add as many parameters as you want, just separate them with a comma.