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TVL Comprog 12 Q3 M1

Information Technology (Colegio de Dagupan)

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QUARTER 3
MODULE 1
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Computer Programming (Java) – Grade 12

Quarter 3 – Module 1 : Java Instances of Operator
First Edition, 2020

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work of the Government of the Philippines. However, prior approval of the
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do not represent nor claim ownership over them.

Published by the Department of Education - Schools Division of Pasig City

Development Team of the Self-Learning Module

Writer : Jose Alvin P. Tagara
Editor : Mrs. Lerma I. Cantanero
Reviewer : Mrs. Rowena O. Dimagiba
Illustrator:
Layout Artist:
Management Team: Ma. Evalou Concepcion A. Agustin
OIC-Schools Division Superintendent
Aurelio G. Alfonso EdD
OIC-Assistant Schools Division Superintendent
Victor M. Javeña EdD
Chief, School Governance and Operations Division and
OIC-Chief, Curriculum Implementation Division

Education Program Supervisors

Librada L. Agon EdD (EPP/TLE/TVL/TVE)

Liza A. Alvarez (Science/STEM/SSP)
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Teresita P. Tagulao EdD (Mathematics/ABM)

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Computer
Programming
QUARTER 3
+
MODULE

1 Instance of Operator in Java

Writer : Jose Alvin P. Tagara

Editor : Mrs. Lerma I. Cantanero
Validator/Reviewer : Mrs. Rowena O. Dimagiba

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Introductory Message

For the Facilitator:

Welcome to the Computer Programming (Java) 12 Self-Learning Module on

Use Case Diagram!

This Self-Learning Module was collaboratively designed, developed and

reviewed by educators from the Schools Division Office of Pasig City headed by its
Officer-in-Charge Schools Division Superintendent, Ma. Evalou Concepcion A.
Agustin, in partnership with the City Government of Pasig through its mayor,
Honorable Victor Ma. Regis N. Sotto. The writers utilized the standards set by the K
to 12 Curriculum using the Most Essential Learning Competencies (MELC) in
developing this instructional resource.

This learning material hopes to engage the learners in guided and independent
learning activities at their own pace and time. Further, this also aims to help learners
acquire the needed 21st century skills especially the 5 Cs, namely: Communication,
Collaboration, Creativity, Critical Thinking, and Character while taking into
consideration their needs and circumstances.

In addition to the material in the main text, you will also see this box in the
body of the module:

Notes to the Teacher

This contains helpful tips or strategies that
will help you in guiding the learners.

As a facilitator you are expected to orient the learners on how to use this
module. You also need to keep track of the learners' progress while allowing them to
manage their own learning. Moreover, you are expected to encourage and assist the
learners as they do the tasks included in the module.

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For the Learner:

Welcome to the Computer Programming (Java) 12 Self-Learning Module on

Use Case Diagram!

This module was designed to provide you with fun and meaningful
opportunities for guided and independent learning at your own pace and time. You
will be enabled to process the contents of the learning material while being an active
learner.

This module has the following parts and corresponding icons:

Expectations - This points to the set of knowledge and skills

that you will learn after completing the module.

Pretest - This measures your prior knowledge about the lesson

at hand.

Recap - This part of the module provides a review of concepts

and skills that you already know about a previous lesson.

Lesson - This section discusses the topic in the module.

Activities - This is a set of activities that you need to perform.

Wrap-Up - This section summarizes the concepts and

application of the lesson.

Valuing - This part integrates a desirable moral value in the

lesson.

Posttest - This measure how much you have learned from the
entire module.

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EXPECTATION
At the end of this module the students will be able to:
1. Understand the basic concept of instance in Java operator
2. Differentiate the types of Java operators
3. Applying the use of instance operator in Java.

PRE–TEST
Directions: Select the correct answer and write the letter on the space
provided before each number.
____1. It is a sets of accessibility in Java program structure.
a. Public b. Default c. Private d. Protected
____2. Which of the following declaration is within the package of Java?
a. Public b. Default c. Private d. Protected
____3. The Java declaration found within the class only?
a. Public b. Default c. Private d. Protected
____4. The declaration on Java where it represents character (1-Z and 0-9).
a. string b. int c. char d. var
____5. Which of the following Java operator compare values in class, subclass and interface?
a. greater than b. less than c. instanceof d. protected

RECAP
1. Describe the difference between Java basic commands System.Out and
println.
______________________________________________________________
______________________________________________________________
______________________________________________________________
2. Describe the JAVA Access Modifiers (Publlic, Protected, Default and Private).
______________________________________________________________
______________________________________________________________
______________________________________________________________
______________________________________________________________

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LESSON
INSTANCEOF OPERATOR IN JAVA
There are types of operator in Java, arithmetic,
relational, bitwise, assignment and logical
operators. The instanceof of operator is used to
test whether the value of an object in specified
type such as class, subclass or interface. It is
also known as comparison operator because it
compares the instance with type. The values
returns either true or false. Figure 1 http://instanceof/3a35V24
Program Example#1 of instanceof:

Class Main{
Public static void main(String[ ] args {
//check a variable of string type
String name = “Programmers”;
boolean result1 = name intanceof String;
System.out.println(“name is an instance of String:”+result1);
//create an object of Main
Main obj = new Main();
//checks if obj is an instance of Main
Boolean result2 = obj instanceof Main;
System.out.println(“obj is an instance of Main:”+result2);
}
}

Output Program Example#1:

name is an instance of String: true
obj is an instance of Main: true

Program Example#2 of instanceof iheritance:

//Java program to check if an object of the subclass is also an instance of the superclass
//superclass
Class Animal{
}
//subclass
Class Dog extends Animal{
}
Class Main {
Public static void main(String [ ] args {
//create an object of the subclass
Dog dg1 = new Dog();
//checks if dg1 is an instance of the subclass
System.out.println(dg1 instanceof Dog:); //print true
//checks if dg1 is an instance of the subclass
System.out.println(dg1 instanceof Animal:); //print true
}
}

Note: The subclass Dog inherit from superclass Animal.

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dg1 instanceof Animal return to True

Output Program Exampl#2
dg1 instanceof Dog : true
dg1 instanceof Animal : true

TYPES OF OPERATORS IN JAVA

1. Arithmetic operators are used in mathematical expression in the same way they
are use in computation. These operators are Addition(+), subtraction(-),
multiplication(*), division(/), modulus(%),increment(++) and decrement(- -).
Example : class OperatorExample{
public static void main(String args[]){
int a=10;
int b=5;
System.out.println(a+b);//15
System.out.println(a-b);//5
System.out.println(a*b);//50
System.out.println(a/b);//2
System.out.println(a%b);//0
}
}
Output : 15 5 50 2 0
2. Relational operators are used to compare between two values of numbers or
integers. The following relational operators are equal to(==), not equal to(!=),
greater than (>), less than(<), greater than or equal to(>=), less than of equal to
(<=).
class Main {
public static void main(String[] args) {
int a = 7, b = 11;
System.out.println("a is " + a + " and b is " + b);
System.out.println(a == b); // false
System.out.println(a != b); // true
System.out.println(a > b); // false
System.out.println(a < b); // true
System.out.println(a >= b); // false
System.out.println(a <= b); // true
}
}

3. Bitwise operators are used to compare between two binary values 0’s and 1’s.
These operators are bitwise and(&), bitwise or(|), bitwise XOR(^), bitwise
compliment(~), left shift(<<) , right shift(>>) and zero fill right(>>>)

4. Assignment operators are used to assign to integer or number. These are equal
sign(=), add equal sign (+=), subtract equal sign(-=), multiple equal sign(*=), divide
equal sign(/=), modulus equal sign(%=), left shift and assignment (<<=), right shift
and assignment(>>=), bitwise and assignment(&=), bitwise exclusive or and
assignment(^=) and bitwise inclusive or and assignment(|=).
Example :
// Java code to illustrate "="

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import java.io.*;
Class Assignment {
public static void main(String[] args)
{
// Declaring variables and Values
int num=10;
String name=”Rizalians”;
// Displaying the assigned values
System.out.println("num is assigned: " + num);
System.out.println("name is assigned: " + name);
}
}
Output: num is assigned: 10
name is assigned: Rizalians

5. Logical operators are used to compare values of variables. This can be true or
false value. These operators are logical and(&&), logical or(||) and logical not(!).
Example :
class Logical {
public static void main(String[] args)
{
// initializing variables
int a = 10, b = 20, c = 20, d = 0;
// Displaying a, b, c
System.out.println("Var1 = " + a);
System.out.println("Var2 = " + b);
System.out.println("Var3 = " + c);
// using logical AND to verify
if ((a < b) && (b == c)) {
d = a + b + c;
System.out.println("The sum is: " + d);
}
else
System.out.println("False conditions");
}
}
Output : Var1 = 10
Var2 = 20
Var3 = 20
The sum is: 50

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ACTIVITY

Directions: Write True in the space provided if the given program statement is true;
otherwise write False.

_______1. The Java declaration for String msg=”Hello World!”;

_______2. The Java declaration
int a=80; b=85; c=90; int grade; grade = (a+b+c)/3;
System.out.println(“The Final Grade:”+grade);
______3. The Java language has no compiler.
______4. The library import java.io.* : io means input output.
______5. The value a=73; b=75; g=(a+b)/2; If g >75; remarks =”True” else remarks
=”False”.

WRAP–UP

1. Compare and contrast the difference between Relational and Logical operator.
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________

2. Discuss the difference between Arithmetic and Assignment operator. Give an

example program code.
________________________________________________________________
________________________________________________________________
________________________________________________________________
________________________________________________________________

VALUING

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Discuss the significance of using instanceof operator in Java programming.

Place your answer here:

POST TEST
Directions: Read carefully. Select the correct answer and write the letter on the space
provided before each number.
______1. Which of the Java operator compares two or more variables?
a. assignment b. arithmetic c. logical d. bitwise
______2. The Java operator dedicated only for numeric value.
a. assignment b. arithmetic c. logical d. bitwise
______3. It is an operator use to evaluate values of object in class and subclass.
a. Logical b. instanceof c. arithmetic d. relational
______4. Declare b >= 75; or c <= 74; Which operator is apply?
a. Logical b. instanceof c. arithmetic d. relational
______5. What does the sign semicolon ( ; ) means?
a. connector b. separator c. return d. none

a. KEY TO CORRECTION
5. False
4. True
3. False
2. True
1. True
Activity :

5. C B 5.
4. A D 4.
3. D B 3.
2. A A 2.
1. B 1.
C
Pre-Test: Post-Test

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REFERENCES
Website:
Instanceof operator in Java January 5, 2021 4:00pm Access from http://bit.ly/3j1c2HH,
http://bit.ly/3r5pjBI, http://bit.ly/39xwE6Z

Photo:
January 5, 2021 3:00pm Access from http://bit.ly/2YtRFZY

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