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String Class Methods In Java

Last Updated : Jul 1, 2023

String Class Methods In Java

In this article we will show you the solution of string class methods in java, string refers to a group of characters. Strings are unchangeable objects in Java, which means they are constant and cannot be modified after they have been generated.

Java.lang.string is used as many built-in methods in Java's String class are available for manipulating strings.

These methods enable us to carry out actions on String objects, including cutting, concatenating, converting, comparing, and replacing strings.

Everything is considered as a String when you submit a form in a window-based, web-based, or mobile application, which makes Java String a strong concept.

Now move to the concept of string class methods in java.

Step By Step Guide On String Class Methods In Java :-

Method: Java String toUpperCase() and toLowerCase() method

public class Testmethodofstringclass{
 public static void main(String args[]){
   String s="Talkerscode";
   System.out.println(s.toUpperCase());
   System.out.println(s.toLowerCase());
   System.out.println(s);
 }
}
  1. In this example, you can see how toUpperCase() and toLowercase() methods are used to generate a Java program.
  2. The Testmethodtostringclass public class is created in the first line of code.
  3. Next, using public static void main, the program's main function is launched.
  4. After that, we make the string. In Java and most other programming languages, strings are a common data type that we may use to store any information associated with word, statements, telephone number, or even just plain numbers.
  5. Next, we utilise the toUpperCase method to print out a string of letters in upper case.
  6. After that, we utilise the toLowerCase method to print out a string in lower case letters.
  7. The string is then printed exactly as it is, without modification.

Method: length() of string in Java

public class Tklength{
 public static void main(String args[]){
   String s="Talkerscode";
   System.out.println(s.length());
  }
}
  1. You can see that we created a Java application using the java StringLength() method here.
  2. You can see that we build a public class called length in our first line of code.
  3. Then, we start our main function using public static void main.
  4. Then, we generate the string with the desired length for printing.
  5. After that, we print the string's length using the length() method.
  6. The length method is used to determine how long the supplied string is.

Method: Java String charAt() Method

public class charAt
{
public static void main(String ar[])
{
String s="Talkerscode";
System.out.println(s.charAt(1));
System.out.println(s.charAt(8));
}
}
  1. You can see that in this example, we created a Java application using the java string charAt() function.
  2. The public class charAt is created on the first code line.
  3. The code's main function is then launched by writing public static void main.
  4. The string containing the character we wish to print is then written using that character's index value.
  5. After that, the statements are printed using the charAt technique.
  6. The String class's charAt() function returns characters at the specified index.

Conclusion :-

Thus, we have successfully acquired the knowledge of Java's string class methods.

We also discovered that the String toLowerCase() function in Java changes this String into lowercase letters and the String toUpperCase() method into uppercase letters.

We also discover how to use the length() method to determine the length of a string. Moreover, the charAt() function of the String class returns the character at the given index.

I hope this article on string class methods in java helps you and the steps and method mentioned above are easy to follow and implement.