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Java Tutorials associated with AP Computer Science A   updated at Jun 15, 2024   1,241   As you set sail on your journey through AP Computer Science A,you're about to delve into the exciting world of Java programming.With a treasure trove of resources at your disposal,let's embark on a guided tour through the essentials of Java,equipping you w...

Java Getting Started   updated at May 15, 2024   741   Some PCs might have Java already installed.To check if you have Java installed on a Windows PC,search in the start bar for Java or type the following in Command Prompt (cmd.exe):If Java is installed,you will see something like this (depending on version):I...

Java Syntax   updated at May 15, 2024   739   In the vast landscape of programming languages,Java stands as a titan – revered for its versatility,reliability,and widespread usage.At the heart of Java lies its syntax,the rules and conventions that govern the structure and behavior of code.Let us embar...

Java Comments   updated at May 15, 2024   753   In Java programming,clarity and readability are paramount.As developers craft intricate algorithms and intricate logic,the need for comprehensive explanations becomes evident.Enter Java comments – a simple yet powerful tool for annotating code and enhanci...

Java Variables   updated at May 15, 2024   509   Variables are containers for storing data values.In Java,there are different types of variables,for example::String - stores text,such as "Hello".String values are surrounded by double quotes,int - stores integers (whole numbers),without decimals,such as 1...

Java Math   updated at May 15, 2024   746   In the realm of Java programming,mathematics plays a pivotal role,empowering developers to perform a myriad of numerical operations with ease.At the heart of these capabilities lies the Java Math class,a treasure trove of methods designed to simplify compl...

Java If ... Else   updated at May 15, 2024   736   You already know that Java supports the usual logical conditions from mathematics::Less than: a < b,Less than or equal to: a b,Greater than or equal to: a >= b,Equal to a == b,Not Equal to: a != b.You can use these conditions to perform different actions f...

Java Short Hand If...Else (Ternary Operator)   updated at May 15, 2024   601   In the vast world of programming,efficiency is key.Every line of code counts,and developers constantly seek ways to streamline their scripts without compromising functionality.One such tool in the Java arsenal is the ternary operator,a concise alternative ...

Java Switch Statements   updated at May 15, 2024   840   Instead of writing many if.else statements,you can use the switch statement.The switch statement selects one of many code blocks to be executed:Syntax:This is how it works::The switch expression is evaluated once.The value of the expression is compared wit...

Java While Loop/Do While Loop/For Loop/For-Each Loop/Break/Continue   updated at May 13, 2024   1,170   Loops can execute a block of code as long as a specified condition is reached.Loops are handy because they save time,reduce errors,and they make code more readable.Java While Loop.The while loop loops through a block of code as long as a specified conditio...

Java Arrays   updated at May 13, 2024   1,367   Arrays are used to store multiple values in a single variable,instead of declaring separate variables for each value.To declare an array,define the variable type with square brackets:We have now declared a variable that holds an array of strings.To insert ...

Java Scope   updated at May 10, 2024   1,151   In Java,variables are only accessible inside the region they are created.This is called scope.Method Scope.Variables declared directly inside a method are available anywhere in the method following the line of code in which they were declared:Block Scope.A...

Java Methods   updated at May 10, 2024   1,132   A method is a block of code which only runs when it is called.You can pass data,known as parameters,into a method.Methods are used to perform certain actions,and they are also known as functions.Why use methods? To reuse code: define the code once,and use ...

Java Recursion   updated at May 10, 2024   1,128   Recursion is the technique of making a function call itself.This technique provides a way to break complicated problems down into simple problems which are easier to solve.Recursion may be a bit difficult to understand.The best way to figure out how it wor...

Java Classes and Objects   updated at May 10, 2024   1,141   Java is an object-oriented programming language.Everything in Java is associated with classes and objects,along with its attributes and methods.For example: in real life,a car is an object.The car has attributes,such as weight and color,and methods,such as...

Java Packages   updated at May 10, 2024   1,171   Java Packages & API.A package in Java is used to group related classes.Think of it as a folder in a file directory.We use packages to avoid name conflicts,and to write a better maintainable code.Packages are divided into two categories::Built-in Packages (...

Java Inheritance (Subclass and Superclass)   updated at May 10, 2024   1,138   In Java,it is possible to inherit attributes and methods from one class to another.We group the "inheritance concept" into two categories::subclass (child) - the class that inherits from another class,superclass (parent) - the class being inherited from.To...

Java Inner Classes   updated at May 10, 2024   1,284   In Java,it is also possible to nest classes (a class within a class).The purpose of nested classes is to group classes that belong together,which makes your code more readable and maintainable.To access the inner class,create an object of the outer class,a...

The Print() Method   updated at May 10, 2024   706   Print Text.You learned from the previous chapter that you can use the println() method to output values or print text in Java:You can add as many println() methods as you want.Note that it will add a new line for each method:Double Quotes.When you are work...

Java Servlet Example   created at Feb 19, 2024   1,148   Creating a quick servlet-based web application involves a few steps. You'll need to set up a development environment, create the necessary project structure, write servlet classes, configure the deployment descriptor (web.xml), and deploy the application t...

How do I replace content that based on the HTML UI Template   created at Feb 12, 2024   1,157   When UI Design is provided or made for specific purpose, we may need to find the easy way can fill it up if that is based on HTML Table.Below case is what I tried during implementing WE Service: If we have multiple items, we can fill it up in the for ...

Dataset of California Foodbanks   created at Jan 28, 2024   1,143   For AP with WE Service, I decided to develop an app that provides information about local food resources in California by using JAVA and HTML. When users enter the name of city where they are living, it will provide information about food banks or soup kit...

Creating a simple Java Servlet (Web Server Page) with Apache Maven on Microsoft Windows   created at Jan 28, 2024   1,230   STEP 1. Install OpenJDK 17https: / / learn.microsoft.com / en-us / java / openjdk / download#openjdk-17 → select microsoft-jdk-17.0.10-windows-x64.msi → Install STEP 2. Install Mavenhttps: / / maven.apache.org / → Download → apache-maven-3.9.6-bin.z...

Java Abstract Classes and Methods   created at Jul 16, 2023   1,230   Data abstraction is the process of hiding certain details and showing only essential information to the user.Abstraction can be achieved with either abstract classes or interfaces (which you will learn more about in the next chapter).The abstract keyword i...

Java Polymorphism   created at Jul 18, 2023   1,122   Polymorphism means "many forms", and it occurs when we have many classes that are related to each other by inheritance.Like we specified in the previous chapter; Inheritance lets us inherit attributes and methods from another class. Polymorphism uses those...

What is Java?   created at Jul 07, 2023   735   With a population of 151.6 million people, Java is the world's most populous island, home to approximately 56% of the Indonesian population.Some of you may curious why Java is the most famous in Indonesia, becaue many of the best known events in Indonesian...