String Methods in Java
Java provides many methods to manipulate strings.
Example
String text = "Hello, Java!";
System.out.println(text.length()); // 11
System.out.println(text.toUpperCase()); // HELLO, JAVA!
System.out.println(text.substring(0, 5)); // Hello
System.out.println(text.replace("Java", "World")); // Hello, World!
System.out.println(text.indexOf("Java")); // 7