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1. Top results related to java tutorial w3schools

   • Java Tutorial

     Learn Java

     Java is a popular programming language.

     Java is used to develop mobile apps, web apps, desktop apps, games and much more.

     Examples in Each Chapter

     Our "Try it Yourself" editor makes it easy to learn Java. You can edit Java code and view the result in your browser.

     Example

     public class Main { public static void main(String[] args) { System.out.println("Hello World"); }}-

     Try it Yourself »

     Click on the "Run example" button to see how it works.

     We recommend reading this tutorial, in the sequence listed in the left menu.

     Java is an object oriented...

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     1/5

   • Java String contains() Method

     Example

     Find out if a string contains a sequence of characters:

     String myStr = "Hello";System.out.println(myStr.contains("Hel"));   // trueSystem.out.println(myStr.contains("e"));     // trueSystem.out.println(myStr.contains("Hi"));    // false

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     Definition and Usage

     The contains() method checks whether a string contains a sequence of characters.

     Returns true if the characters exist and false if not.

     Syntax

     public boolean contains(CharSequence chars)-

     Parameter Values

     CharSequence chars	The characters	to be searched for

     The CharSequence interface is a readable sequence of char values, found in the java.lang package.

     Technical Details

     A boolean	, indicating whether a sequence	of characters exist in the specified string:	true
     NullPointerException	- if the returned value is null

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     2/5

   • Java String copyValueOf() Method

     Example

     Return a String that represents certain characters of a char array:

     char[] myStr1 = {'H', 'e', 'l', 'l', 'o'};String myStr2 = "";myStr2 = myStr2.copyValueOf(myStr1, 0, 5);System.out.println("Returned String: " + myStr2);

     Try it Yourself »

     Definition and Usage

     The copyValueOf() method returns a String that represents the characters of a char array.

     This method returns a new String array and copies the characters into it.

     Syntax

     public static String copyValueOf(char[] data, int offset, int count)-

     Parameter Values

     1.5
     data	A char	array
     offset	An int	value, representing the start	index of the char array
     count	An int	value, representing the length	of the char array

     Technical Details

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     3/5

   • Java protected Keyword

     Example

     The Student subclass accesses a Person class with protected attributes:

     class Person {  protected String fname = "John";  protected String lname = "Doe";  protected String email = "john@doe.com";  protected int age = 24;}class Student extends Person {  private int graduationYear = 2018;  public static void main(String[] args) {    Student myObj = new Student();    System.out.println("Name: " + myObj.fname + " " + myObj.lname);    System.out.println("Email: " + myObj.email);    System.out.println("Age: " + myObj.age);    System.out.println("Graduation Year: " + myObj.graduationYear);  }}

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     Definition and Usage

     The protected keyword is an access modifier used for attributes, methods and constructors, making them accessible in the same package and subclasses.

     Related Pages

     Read more about...

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     4/5

   • Java implements Keyword

     Example

     An interface is an abstract "class" that is used to group related methods with "empty" bodies:

     To access the interface methods, the interface must be "implemented" (kinda like inherited) by another class with the implements keyword (instead of extends). The body of the interface method is provided by the "implement" class:

     // interfaceinterface Animal {  public void animalSound(); // interface method (does not have a body)  public void sleep(); // interface method (does not have a body)}// Pig "implements" the Animal interfaceclass Pig implements Animal {  public void animalSound() {    // The body of animalSound() is provided hereSystem.out.println The pig...

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     5/5

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2. www.w3schools.com › javaJava Tutorial - W3Schools

   www.w3schools.com › java

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   Learn Java. Java is a popular programming language. Java is used to develop mobile apps, web apps, desktop apps, games and much more. Start learning Java now » Examples in Each Chapter. Our "Try it Yourself" editor makes it easy to learn Java. You can edit Java code and view the result in your browser. Example Get your own Java Server.

3. www.w3schools.com › java › java_oopJava OOP (Object-Oriented Programming) - W3Schools

   www.w3schools.com › java › java_oop

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   OOP stands for Object-Oriented Programming. Procedural programming is about writing procedures or methods that perform operations on the data, while object-oriented programming is about creating objects that contain both data and methods.

4. www.w3schools.in › javaJava Tutorial - Learn Core & Advanced Java - W3Schools

   www.w3schools.in › java

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   Java Tutorial. This Java tutorial series will help you get started learning Java programming from the basics. It covers most of the aspects of the Java programming language used by a novice programmer.

5. www.w3schools.in › java › introJava Introduction - W3Schools

   www.w3schools.in › java › intro

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   Java is an object-oriented programming language with its runtime environment. It is a combination of features of C and C++ with some essential additional concepts.

6. www.geeksforgeeks.org › javaJava Tutorial - GeeksforGeeks

   www.geeksforgeeks.org › java

   • Cached

   Aug 7, 2024 · In this tutorial, we will cover everything from the basics of Java syntax to advanced topics like object-oriented programming and exception handling. So, by the end of this tutorial, you will have a strong understanding of Java and be ready to start writing your own Java applications.

7. www.youtube.com › watchClasses and Objects in Java - Java tutorial - w3Schools - Chapter...

   www.youtube.com › watch

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   w3Schools Tutorials. 1.43K subscribers. Subscribed. 15. 1.8K views 2 years ago. Java is an object-oriented programming language. Everything in Java is associated with classes and objects,...

8. campus.w3schools.com › en-in › productsLearn Java — W3Schools.com

   campus.w3schools.com › en-in › products

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   Java lets you write a program once and run it on any device, which makes it great for creating apps that work everywhere. You'll learn object-oriented programming concepts, Java syntax, and how to create robust applications.

9. www.programiz.com › java-programmingLearn Java Programming

   www.programiz.com › java-programming

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   These tutorials will provide you with a solid foundation in Java and prepare you for the next steps in your career. Java Introduction. Get Started With Java. Your First Java Program. Java Comments. Java Fundamentals. Java Variables and Literals. Java Data Types (Primitive) Java Operators. Java Basic Input and Output.

10. docs.oracle.com › javase › tutorialThe Java™ Tutorials - Oracle

    docs.oracle.com › javase › tutorial

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    Mar 4, 2022 · The Java Tutorials are practical guides for programmers who want to use the Java programming language to create applications. They include hundreds of complete, working examples, and dozens of lessons. Groups of related lessons are organized into "trails". Trails Covering the Basics.

11. www.w3schools.com › java › java_getstartedJava Getting Started - W3Schools

    www.w3schools.com › java › java_getstarted

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    Oct 16, 2018 · Java Quickstart. In Java, every application begins with a class name, and that class must match the filename. Let's create our first Java file, called Main.java, which can be done in any text editor (like Notepad). The file should contain a "Hello World" message, which is written with the following code: Main.java.