Mastering String Methods in Java: Essential Techniques for Every Developer

Unlock the full potential of strings in Java with this comprehensive guide to String methods! In this video, we'll explore the most commonly used String methods that every Java developer should know. From manipulating and comparing strings to optimizing your code with advanced techniques, we've got you covered. Whether you're a beginner or an experienced programmer, this tutorial will help you master the ins and outs of working with strings in Java. Don't forget to like, subscribe, and hit the notification bell to stay updated with our latest tutorials on Keen Captain Analytics!

1.String Length
A String in Java is actually an object, which contain methods that can perform certain operations on strings. For example, the length of a string can be found with the length() method:
For Example:
String txt = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
System.out.println("The length of the txt string is: " + txt.length());

2.String Concatenation
The + operator can be used between strings to combine them. This is called concatenation:
String firstName = "Komal";
String lastName = "Sehrawat";
System.out.println(firstName + " " + lastName);

You can also use the concat() method to concatenate two strings:
String firstName = "Komal ";
String lastName = " Sehrawat";
System.out.println(firstName.concat(lastName));
3.toUpperCase() and toLowerCase()
There are many String methods available for example to Lower Case and To Upper Case:

For Example:
String txt = "Hello World";
System.out.println(txt.toUpperCase()); // Outputs "HELLO WORLD"
System.out.println(txt.toLowerCase()); // Outputs "hello world"
4.Finding a Character in a String
The indexOf() method returns the index (the position) of the first occurrence of a specified text in a string (including whitespace):


For Example:
String txt = "Please locate where 'locate' occurs!";
System.out.println(txt.indexOf("locate")); // Outputs 7

5.Adding Numbers and Strings
If you add two numbers, the result will be a number:
int x = 10;
int y = 20;
int z = x + y; // z will be 30 (an integer/number)

If you add two strings, the result will be a string concatenation:
String x = "10";
String y = "20";
String z = x + y; // z will be 1020 (a String)

If you add a number and a string, the result will be a string concatenation:
String x = "10";
int y = 20;
String z = x + y; // z will be 1020 (a String)

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