Java Method

A Java Method is an Object-oriented Method written in a Java Programming Language.

• Context:
  • It can (typically) have the following syntax: modifier returnValueType methodName(list of parameters) { /* Method body;*/ }
  • It can have a Method Definition composed of a Method Header (with Method Modifiers, Method Return Type, Method Name, and Method Parameters) and a Method Body.
  • It can be an Overriden Java Method http://docs.oracle.com/javase/tutorial/java/IandI/override.html.
  • It can be a Hidden Java Method http://docs.oracle.com/javase/tutorial/java/IandI/override.html.
  • It can range from being a Java Constructor Method(a Constructor Method) to being a ...
• Example(s):
  • public static int calculateArea(int _width, int _height){ int myArea = _width * _height; return myArea; }
  • http://www.tutorialspoint.com/images/java_method.jpg
• See: C++ Method, Computer Program Function.

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References

2009

• http://www.tutorialspoint.com/java/java_methods.htm
  • A Java method is a collection of statements that are grouped together to perform an operation. When you call the System.out.println method, for example, the system actually executes several statements in order to display a message on the console.

    In general, a method has the following syntax:

    modifier returnValueType methodName(list of parameters) {
// Method body;
}

    A method definition consists of a method header and a method body. Here are all the parts of a method:

    • Modifiers: The modifier, which is optional, tells the compiler how to call the method. This defines the access type of the method.
    • Return Type: A method may return a value. The returnValueType is the data type of the value the method returns. Some methods perform the desired operations without returning a value. In this case, the returnValueType is the keyword void.
    • Method Name: This is the actual name of the method. The method name and the parameter list together constitute the method signature.
    • Parameters: A parameter is like a placeholder. When a method is invoked, you pass a value to the parameter. This value is referred to as actual parameter or argument. The parameter list refers to the type, order, and number of the parameters of a method. Parameters are optional; that is, a method may contain no parameters.
    • Method Body: The method body contains a collection of statements that define what the method does.

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