Write a Java program to demonstrate String methods (length, charAt, substring, indexOf, split, replace, trim, toUpperCase).

public class StringMethods {
    public static void main(String[] args) {
        String s = "  Automation Testing with Selenium  ";

        // Length
        System.out.println("Length: " + s.length());              // 36

        // Trim whitespace
        String trimmed = s.trim();
        System.out.println("Trimmed: '" + trimmed + "'");

        // Upper and Lower Case
        System.out.println("Upper: " + trimmed.toUpperCase());
        System.out.println("Lower: " + trimmed.toLowerCase());

        // charAt - get character at index
        System.out.println("charAt(0): " + trimmed.charAt(0));    // A

        // indexOf - find position of substring
        System.out.println("indexOf 'Testing': " + trimmed.indexOf("Testing"));  // 11

        // contains - check if substring exists
        System.out.println("Contains 'Selenium': " + trimmed.contains("Selenium"));  // true

        // substring - extract part of string
        System.out.println("substring(0,10): " + trimmed.substring(0, 10));  // Automation

        // replace - replace text
        System.out.println("Replace: " + trimmed.replace("Selenium", "Playwright"));

        // split - split by delimiter
        String csv = "Chrome,Firefox,Edge,Safari";
        String[] browsers = csv.split(",");
        System.out.println("Split count: " + browsers.length);  // 4
        for (String b : browsers) System.out.print(b + " ");

        // startsWith / endsWith
        System.out.println("\nstartsWith 'Auto': " + trimmed.startsWith("Auto"));    // true
        System.out.println("endsWith 'ium':   " + trimmed.endsWith("ium"));         // true

        // equals vs equalsIgnoreCase
        System.out.println("equals: "            + "Selenium".equals("selenium"));            // false
        System.out.println("equalsIgnoreCase: " + "Selenium".equalsIgnoreCase("selenium"));  // true

        // isEmpty / isBlank
        System.out.println("isEmpty: "  + "".isEmpty());    // true
        System.out.println("isBlank: "  + "  ".isBlank());  // true (Java 11+)
    }
}

Length: 36
Trimmed: 'Automation Testing with Selenium'
Upper: AUTOMATION TESTING WITH SELENIUM
Lower: automation testing with selenium
charAt(0): A
indexOf 'Testing': 11
Contains 'Selenium': true
substring(0,10): Automation
Replace: Automation Testing with Playwright
Split count: 4
Chrome Firefox Edge Safari
startsWith 'Auto': true
endsWith 'ium': true
equals: false
equalsIgnoreCase: true
isEmpty: true
isBlank: true

String a = new String("hello");
String b = new String("hello");

System.out.println(a == b);       // FALSE — compares references
System.out.println(a.equals(b));  // TRUE  — compares content

// Verify page title
String title = driver.getTitle().trim().toLowerCase();
assertTrue(title.contains("dashboard"), "Title doesn't contain dashboard");

// Extract number from text like "$1,299.00"
String priceText = element.getText().replace("$", "").replace(",", "").trim();
double price = Double.parseDouble(priceText);