What are other string methods?

In Java, there are several useful string methods that you can use to manipulate and work with strings. Here are some commonly used string methods:

1. length(): Returns the length of the string.

   String str = "Hello";
   int length = str.length(); // 5

2. charAt(int index): Returns the character at the specified index.

   char ch = str.charAt(1); // 'e'

3. substring(int beginIndex, int endIndex): Returns a substring from the specified begin index to the end index (exclusive).

   String sub = str.substring(1, 4); // "ell"

4. indexOf(String str): Returns the index of the first occurrence of the specified substring.

   int index = str.indexOf("l"); // 2

5. toLowerCase(): Converts all characters in the string to lowercase.

   String lower = str.toLowerCase(); // "hello"

6. toUpperCase(): Converts all characters in the string to uppercase.

   String upper = str.toUpperCase(); // "HELLO"

7. trim(): Removes leading and trailing whitespace from the string.

   String trimmed = "  Hello  ".trim(); // "Hello"

8. replace(char oldChar, char newChar): Replaces all occurrences of a specified character with a new character.

   String replaced = str.replace('l', 'p'); // "Heppo"

9. split(String regex): Splits the string into an array of substrings based on the specified regular expression.

   String[] parts = str.split("l"); // ["He", "lo"]

10. equals(Object anObject): Compares the string to the specified object for equality.

    boolean isEqual = str.equals("Hello"); // true

These methods provide a variety of functionalities to handle strings effectively in Java.