Master Java Strings with GLO TECH! Tutorial 12 Java Tutorial for Beginners 2025
Java Strings Explained | GLO TECH #LearnJava #JavaProgramming #Shorts
👋 Welcome back to GLO TECH! In this video, we’ll dive into Java Strings, an essential data type for handling text in Java. Understanding strings and their operations will help you write more efficient and powerful Java programs. Let’s get started! 🚀
What Are Strings in Java?
A String in Java is a sequence of characters enclosed in double quotes. It is widely used to store and manipulate text.
📌 Example: Declaring a String variable:
String greeting = "Hello";
Finding the Length of a String
Java provides built-in methods for performing various string operations. One such method is .length(), which returns the number of characters in a string.
📌 Example:
String txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
System.out.println("The length of the txt string is: " + txt.length());
✅ Output: The length of the txt string is: 26
Converting to Uppercase and Lowercase
Java provides .toUpperCase() and .toLowerCase() methods to convert string characters into uppercase or lowercase.
📌 Example:
String txt = "Hello World";
System.out.println(txt.toUpperCase()); // Outputs "HELLO WORLD"
System.out.println(txt.toLowerCase()); // Outputs "hello world"
Finding a Character in a String
The .indexOf() method helps locate the position of the first occurrence of a specified text within a string.
📌 Example:
String txt = "The quick brown fox jumps over the lazy dog!";
System.out.println(txt.indexOf("fox")); // index will be 16
✅ Output: 16 (Note: Java starts counting positions from 0, so the first character has index 0, the second 1, and so on.)
Concatenating Strings
You can combine (concatenate) two strings using the + operator or the .concat() method.
💡 Pro Tip: Using " " (empty text) between words ensures proper spacing in concatenation.
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