Java Characters and Strings – Explained! Tutorial 9

Publicado el: 27 marzo 2025
en el canal de: GLO TECH

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Java Characters and Strings – Explained! | GLO TECH
👋 Welcome back to GLO TECH! In today’s lesson, we’ll explore Java Characters and Strings, two essential data types used to store and manipulate text in Java. Let’s dive in!
Java Characters (char)
The char data type is used to store a single character and must be enclosed in single quotes ('A').
Example: Declaring a Character in Java
char myGrade = 'B';
System.out.println(myGrade);
✅ Output:
B
Using ASCII Values for Characters
You can also use ASCII values to represent characters:
char myVar1 = 65, myVar2 = 66, myVar3 = 67;
System.out.println(myVar1);
System.out.println(myVar2);
System.out.println(myVar3);
✅ Output:
A
B
C
💡 Tip: Want to explore more ASCII values? Check out our ASCII Table Reference!
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Java Strings (String)
The String data type is used to store a sequence of characters (text) and must be enclosed in double quotes ("Hello").
Example: Declaring a String
String greeting = "Hello World";
System.out.println(greeting);
✅ Output:
Hello World
Why Are Strings Special?
• Strings are non-primitive data types (unlike int or char).
• They refer to objects and have built-in methods to manipulate text.
• Strings are so widely used in Java that they’re often called "the special ninth type."
📌 Don't worry if you’re unfamiliar with objects! We’ll cover them in detail in upcoming tutorials.
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Java Non-Primitive Data Types
Unlike primitive types, non-primitive data types (also known as reference types) refer to objects rather than storing values directly.
Key Differences Between Primitive and Non-Primitive Types
✔ Primitive types (e.g., int, char, boolean) are built into Java.
✔ Non-primitive types (e.g., String, Arrays, Classes) are created by programmers.
✔ Primitive types store values directly, whereas non-primitive types refer to objects and can be null.
✔ Non-primitive types start with an uppercase letter (e.g., String), while primitive types start with lowercase (e.g., int).
💡 Stay tuned! We’ll explore non-primitive data types like Arrays and Classes in future lessons.
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