Arguments are also called____.
Answer: actual parameters
Arguments are also called____.
Answer: actual parameters
Answer: actual parameters
When a method is invoked, the appropriate values must be passed to the method in the form of _____.
When a method is invoked, the appropriate values must be passed to the method in the form of _____.
Answer: arguments
In a Parameter list, it indicates the number and types of data pieces needed, the order in which they must be given, and the local name for these pieces as used in the method
In a Parameter list, it indicates the number and types of data pieces needed, the order in which they must be given, and the local name for these pieces as used in the method
Answer: public double myMethod(int p1, int p2, double p3)
Variables declared in the initialization portion of a ____ statement are declarations of local variables and those variables are in scope only within the ____ loop.
Variables declared in the initialization portion of a ____ statement are declarations of local variables and those variables are in scope only within the ____ loop.
Answer: for and for
Parameters in a ________ are declarations of local variables.
Parameters in a ________ are declarations of local variables.
Answer: method signature
A variable declared within a code block is in scope only within that code block {}. That is,_______.
A variable declared within a code block is in scope only within that code block {}. That is,_______.
Answer: it cannot be used outside the code block.
If two methods each have a local variable of the same name, they are still __________.
If two methods each have a local variable of the same name, they are still __________.
Answer: two entirely different variables.
All method parameters are ______.
All method parameters are ______.
Answer: local variables
All variables declared in the _______are local variables.
All variables declared in the _______are local variables.
Answer: main method
A variable declared within a method definition is called a______.
A variable declared within a method definition is called a______.
Answer: local variable
If a method with a return value also has side effects, and you only want the side effects, you can call it as if it were a ____ method.
If a method with a return value also has side effects, and you only want the side effects, you can call it as if it were a ____ method.
Answer: void
An invocation of a void method is simply a statement:
An invocation of a void method is simply a statement:
Answer: objectName.methodName();
AKA Method Calls.
AKA Method Calls.
Answer: An invocation of a method that returns a value can be used as an expression anyplace that a value of the typeReturned can be used:typeReturned tRVariable; or tRVariable = objectName.methodName();
Primitive types are reference types.
Primitive types are reference types.
Answer: False
The modifier private means that an instance variable can be accessed by name outside of the class definition.
The modifier private means that an instance variable can be accessed by name outside of the class definition.
Answer: False
Any Method Can Be Used as a _____.
Any Method Can Be Used as a _____.
Answer: void Method
A program in Java is just a class that has a ___ method. When you run a Java program, the JRE invokes the method ___.
A program in Java is just a class that has a ___ method. When you run a Java program, the JRE invokes the method ___.
Answer: main. and main.
A void method performs some action but does not return a ___.
A void method performs some action but does not return a ___.
Answer: value.
A void method uses the keyword____in its heading to show that it does not return a value : public void methodName(paramList)
A void method uses the keyword____in its heading to show that it does not return a value : public void methodName(paramList)
Answer: void
A return statement
A return statement
Answer: specifies the value returned and ends the method invocation:return Expression;
The body of a method that returns a value must also contain one or more ____.
The body of a method that returns a value must also contain one or more ____.
Answer: return statements
Actions performed on anything other than the return value are side-effects and should typically be _____.
Actions performed on anything other than the return value are side-effects and should typically be _____.
Answer: avoided.
A method that returns a value must ____ the type of that value in its heading:
A method that returns a value must ____ the type of that value in its heading:
Answer: specify
True or false. Each type of method differs slightly in how it is defined as well as how it is (usually) invoked.
True or false. Each type of method differs slightly in how it is defined as well as how it is (usually) invoked.
Answer: True
There are two kinds of methods:
There are two kinds of methods:
Answer: Methods that compute and return a value and Methods that perform an action
For now, your program and all the classes it uses should be in the same _____or______.
For now, your program and all the classes it uses should be in the same _____or______.
Answer: directory or folder
For example, a class named MyClass must be in a file named _____.
For example, a class named MyClass must be in a file named _____.
Answer: MyClass.java
Reminder: a Java file must be given the same ___ as the class it contains with an added .java at the end.
Reminder: a Java file must be given the same ___ as the class it contains with an added .java at the end.
Answer: name
Invoking a method is equivalent to ______.
Invoking a method is equivalent to ______.
Answer: executing the method body
Methods are invoked using the name of the calling object and the method name as follows:
Methods are invoked using the name of the calling object and the method name as follows:
Answer: classVar.myMethod();
Method definitions are divided into two parts:
Method definitions are divided into two parts:
Answer: a heading and a method body:
In order to refer to a particular instance variable, preface it with its object name as follows:
In order to refer to a particular instance variable, preface it with its object name as follows:
Answer: objectName.instanceVar1 and objectName.instanceVar2
Instance variables can be defined as in the following two examples
Instance variables can be defined as in the following two examples
Answer: private String instanceVar1; and private int instanceVar2;
An object of a class is named or declared by a variable of the class type: ClassName objectIdentifier;The new operator must then be used to create the object and associate it with its variable name: objectIdentifier = new ClassName();These can be combined as follows:
An object of a class is named or declared by a variable of the class type: ClassName objectIdentifier;The new operator must then be used to create the object and associate it with its variable name: objectIdentifier = new ClassName();These can be combined as follows:
Answer: ClassName objectIdentifier = new ClassName(); Example: Person myPerson = new Person();
The new operator must then be used to create the object and associate it with its variable name:
The new operator must then be used to create the object and associate it with its variable name:
Answer: objectIdentifier = new ClassName();
An object of a class is named or declared by a variable of the class type:
An object of a class is named or declared by a variable of the class type:
Answer: ClassName objectIdentifier;
An object is an ______.
An object is an ______.
Answer: instance of a Class.
Instance variable declarations and _____ definitions can be placed in any order within the class definition.
Instance variable declarations and _____ definitions can be placed in any order within the class definition.
Answer: Instance variable declarations and method definitions can be placed in any order within the class definition
A class definition specifies the data items and methods that all of its objects will have, Data items are called
A class definition specifies the data items and methods that all of its objects will have, Data items are called
Answer: fields or instance variables
A class definition specifies the data items and methods that all of its objects will have these data items and methods are some times called ______.
A class definition specifies the data items and methods that all of its objects will have these data items and methods are some times called ______.
Answer: members of the object
Given the following code segment:Public class Square{ ...private int side; ...}Which of the following is true?
Given the following code segment:Public class Square{ ...private int side; ...}Which of the following is true?
Answer: Access to side is only allowed through a method in the Square class.
For a given object, each piece of data can hold a ____ value.
For a given object, each piece of data can hold a ____ value.
Answer: different
All objects of a class have the same pieces of ____ (i.e., name, type, and number).
All objects of a class have the same pieces of ____ (i.e., name, type, and number).
Answer: data
All objects of a class have the same ______.
All objects of a class have the same ______.
Answer: methods
A class type value or object can have ______ of data, as well as actions called methods.
A class type value or object can have ______ of data, as well as actions called methods.
Answer: multiple pieces
A primitive type value is a_______ of data.
A primitive type value is a_______ of data.
Answer: single piece
A class determines the types of data that an object can contain (________), as well as the actions it can perform (_____).
A class determines the types of data that an object can contain (________), as well as the actions it can perform (_____).
Answer: instance variables and methods
If A is a class, then the phrases "blah is of type A," "blah is an ____ of the class A," and "blah is an ______of the class A" mean the same thing.
If A is a class, then the phrases "blah is of type A," "blah is an ____ of the class A," and "blah is an ______of the class A" mean the same thing.
Answer: object and instance
A value of a class type is called an object or an ________.
A value of a class type is called an object or an ________.
Answer: instance of the class
True or False. A class is a special kind of programmer-defined type, and variables can be declared of a class type.
True or False. A class is a special kind of programmer-defined type, and variables can be declared of a class type.
Answer: True
Actions that these objects perform become their ______.
Actions that these objects perform become their ______.
Answer: Methods.
A common method for designing an Object-Oriented Application is to start with the real world objects that your program represents. These become your ______.
A common method for designing an Object-Oriented Application is to start with the real world objects that your program represents. These become your ______.
Answer: Classes.
Programming in Java consist in defining a number of _____.
Programming in Java consist in defining a number of _____.
Answer: classes
What is the most important feature that makes object-oriented programming(OOP) possible?
What is the most important feature that makes object-oriented programming(OOP) possible?
Answer: Classes
Answer: Classes
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