final lab

Question 1

the first step of every class you make:

Answer 1

identify the attributes (ex: private String name;)

Question 2

the Scanner is used in the _____ class

Answer 2

main public class

Question 3

how to make a getter? [what are the two steps] (ex: for private string attribute name for class trainee)

Answer 3

public String getName(){ //(step 1: make a PUBLIC method)
return name; //(step 2: use RETURN to return the wanted private value.)
}

Question 4

what does a getter method do?

Answer 4

a getter method returns its value.

Question 5

what does a setter method do?

Answer 5

sets or updates its value.

Question 6

how do we declare/call out a private value?

Answer 6

using a getter

Question 7

where do we create the getter and setter method?

Answer 7

in the same class the attribute is identified

Question 8

the (setter/getter) method is always void.

Answer 8

setter

Question 9

how to make a setter?

Answer 9

public class Vehicle {
private String color;

public void setColor(String c) {
this.color = c;
}

}

Question 10

steps of making a parameterized constuctor:

Answer 10

1 - intialization for each value/attribute in the constructor (using <this> method or etc)</this>

Question 11

when to use <this> method?</this>

Answer 11

when intializing a value that has the same name as an attribute in the class

Question 12

when to use <this> method?</this>

Answer 12

when intializing a value that has the same name as an attribute in the class

Question 13

write the code for f2 using method display()

Answer 13

f2.display();

(bs it’s that easy)

Question 14

t/f: there is no variable type for a parameterized constructor.

Answer 14

true (ex: public Author(String n, String em, String gen){})

Question 15

write a statement to intialize String gender as char gen.

Answer 15

Gender = gen.charAt(0);

Question 16

write the statement for char input

Answer 16

char ch = input.next().charAt(0);

Question 16

write the statement for char input

Answer 16

char ch = input.next().charAt(0);

Question 17

write a statement to update a private value with the input given from the user:

Answer 17

obj1.setOrderName(input.nextLine());

Question 18

T/F: we initialize a static attribute in the declaration state.

Answer 18

true. DONT FORGET TO

Question 19

in a switch code, where do we put the “wrong entry” statement?

Answer 19

in the default:

Question 20

what’s the math method for Pi?

Answer 20

Math.PI

Question 21

what’s the math method for to the power/

Answer 21

Math.pow(variable name, number to the power of)

Question 22

if the method or attribute in the UML is underlined then that means….

Answer 22

it is static

Question 23

Write a statment that prints all the objects create in a class (ex: class Shape)…
(also there exists an attribute called ShapeCounter() which also has a getter in class Shape)

Answer 23

Shape.getShapeCounter();
(so remember it’s easy just type in the name of the class not the object of the class)