Скачать или смотреть How to Take User Input in Java using InputStreamReader

Disclaimer/Disclosure: Some of the content was synthetically produced using various Generative AI (artificial intelligence) tools; so, there may be inaccuracies or misleading information present in the video. Please consider this before relying on the content to make any decisions or take any actions etc. If you still have any concerns, please feel free to write them in a comment. Thank you.
---

Summary: Learn how to use InputStreamReader in Java to capture user input and enhance your programming skills. This guide provides examples and explanations for taking user input in Java using InputStreamReader. Explore various scenarios and improve your Java programming proficiency.
---

Java programming often involves interacting with users through input and output operations. One common way to obtain user input in Java is by using the InputStreamReader class. This class allows you to read characters from an input stream, such as the standard input stream, which can be connected to the keyboard.

Using InputStreamReader to Capture User Input

To use InputStreamReader for taking user input, follow these steps:

Import Required Classes:
Start by importing the necessary classes for input and output operations.

[[See Video to Reveal this Text or Code Snippet]]

Create InputStreamReader Object:
Create an InputStreamReader object to read input from the standard input stream.

[[See Video to Reveal this Text or Code Snippet]]

Wrap InputStreamReader with BufferedReader:
For efficient reading, wrap the InputStreamReader object with a BufferedReader object.

[[See Video to Reveal this Text or Code Snippet]]

Prompt User for Input:
Display a prompt to the user to indicate what kind of input is expected.

[[See Video to Reveal this Text or Code Snippet]]

Read User Input:
Use the readLine() method of the BufferedReader class to read the user input as a string.

[[See Video to Reveal this Text or Code Snippet]]

Handle IOException:
Since readLine() method can throw IOException, it's important to handle it using a try-catch block.

[[See Video to Reveal this Text or Code Snippet]]

In this example, the program prompts the user to enter two numbers, reads the input using InputStreamReader, converts the input to double data type, performs addition, and then displays the result.

Using InputStreamReader in this manner allows you to capture user input effectively and create interactive Java programs.

Remember, while InputStreamReader is a useful tool for basic input operations, for more complex applications, consider using other input methods and error handling techniques to enhance user experience and program reliability.