Syntax of method in java w3schools

Louise 164 Published: 07/20/2024

Syntax of method in java w3schools

I'm happy to help!

According to W3Schools, syntax of methods in Java is as follows:

Methods

In Java, a method is a block of code that can be executed repeatedly with different inputs.

Syntax:

[public | private | protected] [static] return-type method-name(parameter-list) {
// method body
}

Let's break it down:

access-modifier: This can be one of three values: public: The method can be accessed from anywhere in the program. private: The method can only be accessed within the same class. protected: The method can be accessed within the same class and by subclasses. static: If you make a method static, you don't need an instance of the class to call it. You can call the method directly on the class. return-type: This specifies the type of value that the method will return.

Example:

public class MyMath {
public int add(int a, int b) {
return a + b;
}
}

In this example:

add is a public method (accessible from anywhere in the program). The method takes two int parameters and returns an int result. It performs simple addition and returns the result.

Calling a Method:

To call a method, you need to create an instance of the class that contains the method. Then, use the dot notation to access the method:

MyMath math = new MyMath();
int result = math.add(2, 3);

In this example:

We create a new instance of MyMath called math. We call the add method on math, passing in arguments 2 and 3. The method performs the calculation and returns the result. We assign the result to the variable result.

Overloading Methods:

You can overload methods by providing multiple definitions with different parameter lists. This allows you to perform different actions based on the input parameters.

Example:

public class MyMath {
public int add(int a, int b) {
return a + b;
}
public double add(double a, double b) {
return a + b;
}
}

In this example:

We have two methods add with different parameter types (int and double). You can call the correct method based on the input parameters. The compiler will determine which method to use based on the types of arguments passed.

That's it! Methods in Java are powerful tools that allow you to encapsulate reusable code. I hope this helps you understand the basics!

Please let me know if you have any questions or need further clarification.

What is syntax of method in Java?

I'm happy to help!

The syntax of a method in Java is as follows:

[access modifier] [return type] [method name]([parameter list]) {
// method body
}

Here's a breakdown of the components:

access modifier: This specifies the accessibility of the method. The access modifiers in Java are: public: accessible from anywhere in the program. private: accessible only within the same class. protected: accessible within the same package and subclasses. (default) or no modifier: accessible only within the same package. return type: This specifies the type of value that the method returns. If the method does not return any value, you can specify void. method name: This is a unique identifier for the method. [parameter list]: This is a comma-separated list of parameters passed to the method. Each parameter must have a data type and an optional variable name.

Here's an example of a simple Java method that takes two integer parameters and returns their sum:

public int add(int x, int y) {
return x + y;
}

In this example:

The access modifier is public. The return type is int, indicating that the method returns an integer value. The method name is add, which uniquely identifies the method. The [parameter list] contains two integer parameters, x and y.

When you call this method, you can pass in values for x and y, like this:

int result = add(3, 5);
System.out.println("The sum is " + result); // Output: The sum is 8

In addition to the basic syntax, there are some important aspects of method design to keep in mind:

Method overloading: You can define multiple methods with the same name but different parameter lists. When you call a method, Java will choose the correct one based on the number and types of parameters passed. Method overriding: When you inherit from a superclass, you can provide your own implementation for an existing method (the super class's method is called "overridden"). The new method must have the same name, return type, and parameter list as the original method.

By understanding the syntax and principles of Java methods, you can write reusable, modular code that effectively encapsulates logic and behavior.