JAVA METHOD PART 1 Flashcards
_________ in Java are like the basic units or building
blocks of a Java program
Methods
A method is a group of code that performs a
specific _______ or ______.
Task or Operation
Methods are used to carry out specific actions
and are sometimes called _______.
functions
The __________ is the starting point of a Java
program, and it is the first method executed by
the JVM (Java Virtual Machine)
main() method
Methods in Java are ____________ designed to perform specific tasks
reusable blocks of
code
Determines who can use the class, method,
or field (e.g., public, private).
accessSpecifier
The name of the method, written in
camelCase (e.g., calculateSum).
methodName:
Input values that the method can accept. A method can have zero or more parameters, each with a data type and name.
parameter
The code inside curly braces {} that defines
what the method does.
method body
If the method has a return type (not void), it must include a return statement followed by the value to be sent back.
return statement
Can be accessed from any class.
Public
Can only be accessed within the class where it is defined.
Private
Accessible within the same package or by subclasses in different packages.
Protected
Automatically applied if no specifier is mentioned. Accessible only within the same package.
Default
The ____________ in Java includes the method name and its parameter list.
method signature
The method signature in Java includes the method
name and its ____________.
parameter list
The parameter list consists of:
1.____________
2.____________
3.____________
- The number of parameters.
- The type of parameters.
- The order of parameters.
If there are ____________, they are separated by commas.
multiple parameters
If there are multiple parameters, they are separated by _________.
commas
If there are no parameters, use an empty pair of
__________.
parentheses ()
Parameters allow you to pass _______ to the method
values
Parameters are declared inside the parentheses after the ____________.
method name
The scope of parameters is limited to the ___________.
method
body
Parameters are optional, and a method can have _______ parameters.
zero
The method body is a block of code that
contains:
1.)_________ to perform tasks.
2.)_________ and __________ (if
needed).
3.)___________ (optional, depending on
the method type).
The method body is a block of code that
contains:
STATEMENTS to perform tasks.
LOCAL VARIABLES and LOCAL CLASS (if
needed).
A RETURN STATEMENT (optional, depending on
the method type).
If the return type is void, the method performs
a task without returning any _____.
value
Such methods do not include a ______ statement
return
If the return type is a data type (e.g., int, float, double), the method must return a _____ to the caller.
value
The ______ cannot end without executing a return statement.
method
The method provides a piece of data that can be used elsewhere in the program.
Return a value
The method directly displays information (e.g., on the screen).
Print output
These are methods created by programmers to perform
specific tasks.
They are designed to meet the unique requirements of a
program.
User-Defined Methods
System-Defined Methods:
Also called ________ or ________ methods.
built-in or library
Also called built-in or library methods.
These are pre-written methods available in Java’s standard
libraries (part of the JDK).
You can use them directly without writing the code yourself.
System-Defined Methods
What are the two basic types of methods?
- System-Defined Methods
- User-Defined Methods
This is a custom method that takes two integers as input and returns their sum.
add (int num1, int num2):
This is a custom method that checks if a number is even.
isEven (int number)
This is a system-defined method from the Math class that calculates the square root of a number.
Math.sqrt(double a)
This is a system-defined method from the String class that returns the length of a string.
String.length()
Used in method declarations to show that the method does not return any value.
Void Keyword
A ____ method acts but does not return a result that can be used in an expression.
void
Used to exit a method and, if needed, return a value to the caller. It is used in methods that have a return type (not
void)
Return Keyword
When ______ is executed, the method stops immediately, and control goes back to the caller.
return
Methods with a ________ (e.g., int, String, double) must use return to send a value back
return type
If a method has a return type (e.g., int, String), it must return a _____ of that type.
value
Act as placeholders for values that are passed to a method when it is called.
Method Parameters
Act as __________ for values that are passed to a method when it is called.
placeholders
The actual values passed are called ___________.
arguments
Parameters and arguments make methods ________ and _________ for different situations.
flexible and reusable
__________ and __________ make methods flexible and reusable for different situations.
Parameters and arguments
Variables are listed in the method signature to accept
input values.
Method Parameters
The actual values are passed to the method when it is
called.
Method Arguments
Allows you to define multiple methods in the same class with the same name but different parameter lists.
Method Overloading
The compiler identifies the correct method based on
the _______, _______, and ______ of parameters.
number, type, and order of parameters
The __________ identifies the correct method based on
the number, type, and order of parameters
compiler
All _________ methods must have the same name
overloaded
In _______________, Methods must differ in the number, type, or order of parameters.
Overloading method
_________ methods can have the same or different return types, but the return type alone cannot distinguish methods.
Overloaded
