ICS2602

What is JDK stand for?

Java Development Kit

What is JRE stand for?

Java Runtime Environment

True or False

is Java Multi-Threaded?

True

What is JVM stand for?

Java Virtual Machine

It define the starting and ending point of a flowchart

Terminal

Preparation or Initialization of memory space for data processing

Initialization

it used to represent the data input and output

parallelogram / Input or Output

Manipulation of data

Rectangle / Process

process condition using relational operators. used for trapping and filtering data.

Decision

defines the logical sequence of the program. It points to the next symbol to be performed

Flow line

Connects to the flowchart to avoid spaghetti connection on the same page.

On-page connector

Connects the flowchart on different page to avoid spaghetti connection.

Off-page connector

it represent a flow which is carried out in a particular order

Sequence Structure

represents a flow where in process are selected based on certain condition

Selection structure

represent a flow which, based on some predetermined frequency or condition, is carried out over and over again as long as the requirement is satisfied, or until some criteria has been met

Repetition structure

repeats a set of action based on the answer to a question

Loop structure (repetition or iteration)

English-like representation of the logical steps it takes to solve a problem

Pseudocode

Pictorial representation of the logical steps it takes to solve a problem

Flowchart

A data type is used for string of characters such as names, addresses phone number

String

A group of statement that performs a specific task when called in a program

Java Methods

a function return the absolute value of the parameter passed to it.

Math.abs()

a function rounds a floating points value up to the nearest Integer value.

Math.ceil()

a function round a floating points value down to the nearest integer value.

Math.floor()

a method return the smallest of two value passed to it as parameter

Math.min()

a method return the largest of the value passed to it as parameter.

Math.max()

a math rounds a float or double to the nearest integer

Math.round()

a method returns a number a random floating point number between 0 and 1.

Math.random()

A function returns e (Euler's number) raised to power of the value provided as parameter

Math.exp()

a method provides the logarithm of the given parameter

Math.log()

a function takes two parameter and raised to the power of the second parameter

Math.pow()

It calculates the square root of the parameter given to it

Math.sqrt()

a constant double with a value that is very close to the value of PI.

Math.PI

calculates the sine value of some angle value in radians

Math.sin()

how do you declare a constant variable in Java?

final

True or False

is this float?

float x = 2.33;

False, Why when you use float after 2.33 you need to declare a f at the end. The output is 2.33f

True or False

is this the right way to create a Java?

print class x{

print class static void main(String[]args){

}

}

True

Which is not belong to Java keyword

1. console.log

2. abstract

3. assert

4. break

console.log is not belong to Java keyword

True or False

what is wrong in this program>

public class x {

public static void main (String[]args){

System.out.print("Hello World")

}

}

Semi-colon must be put after the close parenthesis.

What do you need to import if the user want to type in keyboard?

Java.util.*/ Java.util.Scanner

cursor moves to the beginning of the next line

\n

Write a Java program to print the result of the following operations. Test Data: a. -5 + 8 6b. (55+9) % 9c. 20 + -35 / 8d. 5 + 15 / 3 * 2 - 8 % 3

You need to code this.

Write a Java program to compute the area of a hexagon.

Use methods to do this.

Area of a hexagon = (6 s^2)/(4tan(π/6))where s is the length of a side Input Data: Input the length of a side of the hexagon: 6

You need to code this.

Write a Java program to convert a octal number to a hexadecimal number. Use methods to do this

Input Data: Input a octal number : 100

You need to code this.

Write a Java program to print the area and perimeter of a rectangle.

Test Data: Width = 5.5 Height = 8.5

You need to code this.

What is WORA?

Write Once, Run Anywhere

Checks bytecode and communicate with the operating system

Java Interpreter

Programming statements written in high-level programming languages

Source Code

Retrieves input as a long. Note that when you enter an input value that will be stored as long, you do not type an L. The L is used only with constants coded within a program.

nextLong()

Continue to the end of the current line. Do not require and ending symbol

Line comments

Begin with a forward slash and two asterisk (/*) and end with asterisk and forward slash (/)

Javadoc

Provides prewritten information about java classes

Java API

A software development kit(SDK) of programming tools

JDK

Translate program code into machine language (binary language)

Compiler or an Interpreter

Named memory location whose value can vary

Variable

Produce incorrect output as result

Logical errors

Focusses on the object or "Things" and describes their features (for attributes) and their behaviors.

Object-oriented programming

Hypothetical computer developed to make Java programs machine independent

JVM

Allows the user to interact with a program in a graphical environment

Graphical User Interface (GUI)

Location on your computer screen at which you type text entries to communicate with the computer operating system.

Command line

Each word of an identifier begins with uppercase letter

Upper Camel casing

Means the method is accessible and usable even though no object of the class exist

Static

Organize code and improve readability

Whitespace

True or False

is this the right way to program switch statement?

int x;

switch(x){

case 1:

break;

case 2:

break;

}

True

The compiler does not translate, and the JVM does not execute its command

Comment out