How a parameter is declared within a method header?
A method's declaration provides a lot of information about the method to the compiler, the runtime system and to other classes and objects. Besides the name of the method, the method declaration carries information such as the return type of the method, the number and type of the arguments required by the method, and what other classes and objects can call the method. While this may sound like writing a novel rather than simply declaring a method for a class, most method attributes can be declared implicitly. The only two required elements of a method declaration are the method name and the data type returned by the method. For example, the following declares a method named isEmpty() in the Stack class that returns a boolean value (true or false): Show class Stack { . . . boolean isEmpty() { . . . } } Returning a Value from a MethodJava requires that a method declare the data type of the value that it returns. If a method does not return a value, it must be declared to return void. A Method's NameA method name can be any legal Java identifier. There are three special cases to consider in regards to Java method names: Advanced Method Declaration FeaturesBesides the two required elements of a method declaration, a method declaration may contain other elements as well. These elements declare the arguments accepted by the method, whether the method is a class method, and so on. How do you declare a method using parameters?Parameters and Arguments
Information can be passed to methods as parameter. 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.
How do you write a method header?You can write a method header with just a few simple steps.. Choose public or private.. Choose what the method returns: void (nothing), int, double, boolean, String, or the name of a class.. Choose the name of the method.. Choose what parameters to pass into the method.. What is a method header?A method header is the part of the method definition that occurs at the beginning. The following definition leaves out a few obscure features, but gives the syntax of ordinary method headers. See Syntax Notation to understand how to read the following.
How is a method declared?The method declaration defines all the method's attributes, such as access level, return type, name, and arguments, as shown in the following figure. The method body is where all the action takes place. It contains the instructions that implement the method.
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