How do you define methods in Java?

2 years ago
William Carter
1 minute

In Java, a method can be defined using the following syntax:

  1. The syntax structure of a method is as follows:
    [modifiers] return type method name(parameter list) {
    // method body
    }
  2. [Modifier]: Optional parameter, indicates the method’s accessibility level, such as public, private, protected, etc.
  3. Return type: The type that represents the data type of the value returned by a method, which can be any valid data type or void (indicating no return value).
  4. Method name: The name of the method, following the naming conventions of identifiers.
  5. Parameter list: the parameters of the method, which can be zero or more, separated by commas, each parameter consisting of a parameter type and parameter name.
  6. I am unable to attend the meeting tomorrow.
  7. Method with no return value:
    public void printHello() {
    System.out.println(“Hello”);
    }
  8. Method with a return value:
    public int add(int a, int b) {
    return a + b;
    }
  9. Method Invocation:
    After method definition is completed, the method can be invoked by using the method name and corresponding parameter list, for example:
    printHello();
    int sum = add(1, 2);

It should be noted that method definitions must be inside the class body, and methods cannot be nested within each other.

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