String Methods | Java Tutorial

Here we will see some of the popular methods we can use with strings.

length(): This method is used to find the length of a string.

Example:

public class StringExample {
    public static void main(String[] args) {
        String quote = "To be or not to be";
        System.out.println(quote.length());
    }
}

Output:

indexOf(): This method returns the first occurrence of a specified character or text in a string.

Example:

public class StringExample {
    public static void main(String[] args) {
        String quote = "To be or not to be";
        System.out.println(quote.indexOf("be"));    // index of text
        System.out.println(quote.indexOf("r"));     // index of character
    }
}

Output:

3
7

toLowerCase(): Converts string to lower case characters.

Example:

public class StringExample {
    public static void main(String[] args) {
        String quote = "THOR: Love and Thunder";
        System.out.println(quote.toLowerCase()); 
    }
}

Output:

thor: love and thunder

toUpperCase(): Converts string to upper case characters.

Example:

public class StringExample {
    public static void main(String[] args) {
        String quote = "THOR: Love and Thunder";
        System.out.println(quote.toUpperCase());     
    }
}

Output:

THOR: LOVE AND THUNDER