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.
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.
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.
System.out.print("Hello "); displays ______ on the same line.
System.out.print("Hello "); displays ______ on the same line.
The import statement is added to use a predefined method for ______.
The import statement is added to use a predefined method for ______.
All predefined classes and methods in Java API are organized into ______.
All predefined classes and methods in Java API are organized into ______.
Adding a System.out.println(); statement does not always produce a ______.
Adding a System.out.println(); statement does not always produce a ______.
The program imports classes from the ______ package to use its features.
The program imports classes from the ______ package to use its features.
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.
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.
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.
The variable ______ is declared to store integer input within the main method.
The variable ______ is declared to store integer input within the main method.
Flashcards
System.out.print()
System.out.print()
Displays output on the same line.
System.out.println()
System.out.println()
Displays output on a new line.
Import statement
Import statement
Used to include predefined classes from packages in Java.
Input in Java
Input in Java
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Input process
Input process
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Input
Input
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Output
Output
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Console Output (Java)
Console Output (Java)
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"Hello World!" Program (Example)
"Hello World!" Program (Example)
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Scanner class
Scanner class
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nextInt() method
nextInt() method
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System.in
System.in
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Scanner object
Scanner object
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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 inputscanner.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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