The String Class

What is a string in Java?

• A collection of booleans
• A collection of integers
• A collection of characters
• A collection of floats

What does it mean for a string to be immutable?

• It can be updated once created
• It can't be deleted once created
• It can't be updated once created
• It can be deleted once created

What does the charAt() method do?

• Returns the length of a string
• Compares two given strings
• Converts the string to lowercase letters
• Returns a character at a specified position

What does the equals() method do?

• Converts the string to lowercase letters
• Returns a character at a specified position
• Returns the length of a string
• Compares two given strings

What does the concat() method do?

• Returns the length of a string
• Appends one string to the end of another
• Returns a character at a specified position
• Converts the string to lowercase letters

What does the length() method do?

• Converts the string to lowercase letters
• Returns the length of a string
• Returns a character at a specified position
• Compares two given strings

What does the toLowerCase() method do?

• Returns the length of a string
• Converts the string to uppercase letters
• Returns a character at a specified position
• Converts the string to lowercase letters

What does the toUpperCase() method do?

• Returns a character at a specified position
• Converts the string to uppercase letters
• Returns the length of a string
• Converts the string to lowercase letters

What does the indexOf() method do?

• Returns the length of a string
• Converts the string to lowercase letters
• Returns the first found position of a character
• Returns a character at a specified position

What does the substring() method do?

• Converts the string to lowercase letters
• Returns a character at a specified position
• Returns the length of a string
• Extracts the substring based on index values, passed as an argument