Write A Java Program To Demonstrate Use Of string Class Methods

: chatat(), contains(), format(), length(), split()

In this, we will create a java program which show the use of chatat(), contains(), format(), length(), split() methods of string.

Here's a program in java that defines a string and show the use of its different methods.

Program

public class StringDemo {
    public static void main(String[] args) {
        // Using charAt() method
        String str1 = "Hello World";
        char ch = str1.charAt(6);
        System.out.println("Character at index 6 in string " + str1 + " is: " + ch);

        // Using contains() method
        String str2 = "Java is a programming language";
        boolean result = str2.contains("programming");
        System.out.println("Does string " + str2 + " contain the word 'programming'? " + result);

        // Using format() method
        String str3 = "Harsh";
        int age = 18;
        float height = 5.7f;
        String formattedString = String.format("My name is %s, I am %d years old, and I am %f feet tall.", str3, age, height);
        System.out.println(formattedString);

        // Using length() method
        String str4 = "This is a test string";
        int length = str4.length();
        System.out.println("Length of string " + str4 + " is: " + length);

        // Using split() method
        String str5 = "The quick brown fox jumps over the lazy dog";
        String[] words = str5.split(" ");
        System.out.println("Words in string " + str5 + " are:");
        for (String word : words) {
            System.out.println(word);
        }
    }
}
    

Output

Character at index 6 in string Hello World is: W
Does string Java is a programming language contain the word 'programming'? true
My name is Harsh, I am 18 years old, and I am 5.700000 feet tall.
Length of string This is a test string is: 21
Words in string Java Is Programming Language are:
Java
Is
Programming
Language

Explanation

In this program, we use the string class methods charat(), contains(), format(), length(), and split().

The charat() method is used to get the character at a specific index in a string.

The contains() method is used to check if a string contains a specific substring.

The format() method is used to create a formatted string using placeholders and arguments.

The length() method is used to get the length of a string.

The split() method is used to split a string into an array of substrings based on a delimiter.

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