String Methods in Programming

A variable stores data, like a box holding a specific value.

A special type of variable that represents an object.

A blueprint or template used to create objects.

Actions or behaviors associated with an object, defined within its class.

A value passed to a method, providing additional information for the method to work with.

The result returned by a method after completing its task.

An error caused by using a variable before it has been declared or assigned a value.

Incorrectly trying to declare a variable and assign a value in the same statement.

Online resources providing detailed documentation for classes and methods.

A program designed to test the functionality of a class or method.

A sequence of characters, like a sentence, word, or even a single character, that can be stored and manipulated within a program.

The information that a method needs to perform its task, like the text itself when calculating the length of a string.

The number of characters within a string, calculated using a method.

A way to store and retrieve the return value of a method, allowing you to use the result for further processing.

The process of using the return value of one method as input for another method, creating a chain of actions.

Methods that perform actions without returning any specific value, like displaying text on the screen.

A comment is a line of text ignored by the compiler, used to explain code to humans.

Comments are used to provide explanations for other programmers reading the code or for the programmer's future reference.

In Java, you use '//' as a delimiter to signify the start of a comment. The compiler ignores everything from the '//' to the end of the line.

Use '/' to start a multiline comment and '/' to end it. The compiler ignores everything between these delimiters.

The assignment operator '=' is used to assign a value to a variable.

When you assign a new value to a variable using the assignment operator, the previous value is replaced with the new one.

You cannot use a variable without first assigning it a value. You must initialize it with a value before you can work with it.

The assignment operator '=' is used to change the value of a variable, not to declare it. You can't declare and assign a value in the same single statement.

A method that changes the state of an object.

Methods that provide access to the internal state of an object without modifying it.

A method that moves a rectangle by a specified distance in the x and y directions.

The coordinates of the top-left corner of a rectangle.

A rigid motion in geometry that shifts every point of a plane by a constant distance in a given direction.

A process that involves moving a rectangle by a specific distance in both the horizontal and vertical directions.

A set of methods that are grouped together within a specific class.

A section within the API documentation that provides a concise overview of the methods and constructors available in a class.

A method that does not return any specific value, often used for performing actions that have a visible effect.

A section within the API documentation that provides a detailed description of a specific method, including its purpose, parameters, and return value.

The values that are passed to a method when it is called, providing additional information.

A software development environment designed for object-oriented programming, specifically Java. It emphasizes interactive learning and exploration.

In BlueJ, you can create new objects, place them on a virtual workbench, interact with them by invoking methods, and observe the results without writing code.

A method call in BlueJ allows you to execute a specific operation or behavior associated with an object.

BlueJ is free to download and use, making it a great tool for learning and experimenting with Java.

DrJava is another interactive development environment for Java that allows you to explore objects and write code.

An API (Application Programming Interface) is a set of rules and specifications for interacting with a particular software component, such as a class.

An object variable stores the memory location of an object, not the object itself.

A variable's type determines the kind of data it can hold. For example, an object variable can only hold the memory location of an object.