1. Concatenate Strings:
You can concatenate two or more strings using the + operator.
String firstName = 'John';
String lastName = 'Doe';
String fullName = firstName + ' ' + lastName;
System.debug(fullName); // Outputs: John Doe
2. Get Length of a String:
You can find the length of a string using the length() method.
String message = 'Hello, World!';
Integer messageLength = message.length();
System.debug('Length of message: ' + messageLength); // Outputs: Length of message: 13
3. Convert to Uppercase or Lowercase:
You can convert a string to uppercase or lowercase using the toUpperCase() and toLowerCase() methods.
String text = 'This is a Sample Text';
String uppercaseText = text.toUpperCase();
String lowercaseText = text.toLowerCase();
System.debug(uppercaseText); // Outputs: THIS IS A SAMPLE TEXT
System.debug(lowercaseText); // Outputs: this is a sample text
4. Check If a String Contains Substring:
You can check if a string contains a specific substring using the contains() method.
String sentence = 'The quick brown fox';
Boolean containsFox = sentence.contains('fox');
System.debug('Contains "fox": ' + containsFox); // Outputs: Contains "fox": true
5. Split a String into Substrings:
You can split a string into substrings using the split() method.
String csvData = 'Apple, Banana, Cherry';
List<String> fruits = csvData.split(', ');
System.debug(fruits); // Outputs: (Apple, Banana, Cherry)
6. Replace Substrings:
You can replace substrings within a string using the replace() method.
String text = 'Hello, World!';
String replacedText = text.replace('Hello', 'Hi');
System.debug(replacedText); // Outputs: Hi, World!
