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☕ Java Characters and Strings

Unlock the Power of Text and Symbols in Java

In Java, characters and strings are fundamental to managing text and symbolic data. Whether you’re handling a single letter or an entire paragraph, Java gives you powerful tools to work with characters and strings effectively.

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🔤 Java char – The Character Data Type

The char data type in Java is used to store a single 16-bit Unicode character. Unlike other languages that may use ASCII by default, Java supports Unicode — which means it can store characters from virtually any language in the world.

char letter = 'G';
System.out.println(letter);  // Output: G

🎯 Key Features:

• Occupies 2 bytes of memory.
• Enclosed in single quotes ('A', '3', '$').
• Can also be assigned using Unicode values or ASCII integers.

char unicodeChar = '\u0041'; // Unicode for 'A'
char asciiChar = 66;         // ASCII for 'B'
System.out.println(unicodeChar);  // Output: A
System.out.println(asciiChar);    // Output: B

💡 GoNimbus Pro Tip: Want to explore special symbols or foreign characters? Use \u followed by four-digit Unicode.

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📚 Java String – The Most Loved Type

The String class in Java is used to store a sequence of characters (text). It’s one of the most powerful and frequently used non-primitive data types.

String message = "Welcome to GoNimbus!";
System.out.println(message);

🌟 Why Strings Are Special:

• Strings are objects, not primitive types.
• They come with built-in methods like .length(), .toUpperCase(), .substring() and many more.

String fullName = "GoNimbus Academy";
System.out.println(fullName.length());          // Output: 17
System.out.println(fullName.toUpperCase());     // Output: GONIMBUS ACADEMY
System.out.println(fullName.substring(0, 8));   // Output: GoNimbus

🧠 Did You Know?
Strings are immutable. That means once a String is created, it cannot be changed. Every string operation returns a new string object!

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🔍 Character vs. String – What’s the Difference?

Feature	char	String
Size	2 bytes	Varies with content
Quotes	Single 'A'	Double "Hello"
Mutability	Mutable	Immutable
Type	Primitive	Non-primitive (Object)

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🚀 Use Cases in Real World

• char: Used in grading systems ('A', 'B', etc.), gender ('M', 'F'), symbols.
• String: Used in messaging, forms, file names, user input, and almost every Java app!

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✅ Quick Recap

• Use char when you need to store just one symbol or letter.
• Use String when you’re working with text or words.
• Strings are powerful – explore their methods to supercharge your Java code!

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🧩 Coming Up Next on GoNimbus Java Series:

Learn how to manipulate and compare Strings like a pro. Dive into StringBuilder, StringBuffer, and performance optimization tricks!

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