Podcast
Questions and Answers
Input is the process of entering data in software running on a computer through ______, various types of files, or mouse commands.
Input is the process of entering data in software running on a computer through ______, various types of files, or mouse commands.
typed text
Output can be in any form such as output to a screen, a disk, a printer, or even in a form of ______ found in robots in a manufacturing site.
Output can be in any form such as output to a screen, a disk, a printer, or even in a form of ______ found in robots in a manufacturing site.
movement
The standard output device, by default, is the computer ______.
The standard output device, by default, is the computer ______.
monitor
Java uses ______ to refer to the console output, the output sent to the console.
Java uses ______ to refer to the console output, the output sent to the console.
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The println method is part of the Java API, a predefined set of ______ used in any Java program.
The println method is part of the Java API, a predefined set of ______ used in any Java program.
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The cursor is placed next to or at the end of the ______ rather than displayed on the second line.
The cursor is placed next to or at the end of the ______ rather than displayed on the second line.
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System.out.print("Hello "); displays ______ on the same line.
System.out.print("Hello "); displays ______ on the same line.
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The import statement is added to use a predefined method for ______.
The import statement is added to use a predefined method for ______.
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All predefined classes and methods in Java API are organized into ______.
All predefined classes and methods in Java API are organized into ______.
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Adding a System.out.println(); statement does not always produce a ______.
Adding a System.out.println(); statement does not always produce a ______.
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The program imports classes from the ______ package to use its features.
The program imports classes from the ______ package to use its features.
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In Java, to refer to the keyboard as a standard input device, the class ______ is used.
In Java, to refer to the keyboard as a standard input device, the class ______ is used.
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The method ______() is called to read the next integer input from the user.
The method ______() is called to read the next integer input from the user.
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The line 'scanner = new Scanner(System.in);' creates a new instance of the ______ class.
The line 'scanner = new Scanner(System.in);' creates a new instance of the ______ class.
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The variable ______ is declared to store integer input within the main method.
The variable ______ is declared to store integer input within the main method.
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Study Notes
Input and Output
- Input is entering data into software. This can be typed text, files, or mouse actions.
- Word processing software takes input as alphanumeric data, based on keystrokes.
- Output is data produced by software. This can be displayed on printers, screens, monitors, or other devices. Output is often a working application or software.
Hello World! Program
- A simple program often used to learn a new programming language.
- Ensures the correct setup and usage of the compiler and program structure.
-
System.out.println("Hello World!");is a Java statement. - Prints "Hello World!" to the screen. The
printlnpart moves the cursor to the next line. - Removing the
lnfromprintlnkeeps the cursor on the same line after printing.
Java Output
- Java defaults to the monitor as the output device.
-
System.outrefers to the console output. - The
printlnmethod displays text or values on the console.
Using println
-
printlndisplays the string within the parentheses. -
printlnmoves the cursor to the next line after displaying the output. - The
printmethod will print the result to the console without automatically moving to the next line, making the cursor appear at the end of the string.
Input
- Input sources include keyboards, mice, disks, or sensors in industrial settings.
- Input changes how the program’s output functions.
- Input must be modified and compiled for a program to execute correctly.
Java Import Statements
- Java uses
importstatements to access predefined methods and classes. - These classes are organised into packages.
-
import java.util.*;imports all classes in thejava.utilpackage. - Example includes
Scannerfor receiving input.
Using Scanner Class
-
Scanner scanner = new Scanner(System.in);creates aScannerobject for user input -
scanner.nextInt();gets integer input from the user. -
System.out.print()displays text on the console to prompt the user for input.
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Description
This quiz focuses on the fundamental concepts of input and output in Java, including basic commands like println. It tests your understanding of how data is entered into software and the various output devices used in Java programming. Get ready to explore the Java environment with simple exercises!
