String Methods in Java || Episode #7 || equals(), equalsIgnoreCase(), compareTo()....

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Java String Methods: toUpperCase(), toLowerCase(), equals(), equalsIgnoreCase(), compareTo(), compareToIgnoreCase().
The Java String toLowerCase() method converts all characters in the string to lower case characters.

The syntax of the string toLowerCase() method is:
string.toLowerCase()
Here, string is an object of the String class.
toLowerCase() Return Value
Returns a string with all upper case letters converted to lower case letters.

The Java String toUpperCase() method converts all characters in the string to upper case characters.

The syntax of the string toUpperCase() method is:
string.toUpperCase()
toUpperCase() Parameters:
doesn't take any parameters.
toUpperCase() Return Value:
returns a string with all lower case letters converted to upper case.

The Java String equals() method returns true if two strings are equal. If not, equals() returns false.

The syntax of the String equals() method is:
string.equals(String str)
Here, string is an object of the String class.
equals() Parameters
The equals() method takes a single parameter.
str - the string to be compared.
equals() Return Value:
returns true if the strings are equal.
returns false if the strings are not equal.
returns false if the str argument is null.

The Java String equalsIgnoreCase() method compares two strings, ignoring case differences. If the strings are equal, equalsIgnoreCase() returns true. If not, it returns false.

The syntax of the string equalsIgnoreCase() method is:
string.equalsIgnoreCase(String str)
Here, string is an object of the String class.
equalsIgnoreCase() Parameters:
The string equalsIgnoreCase() method takes a single parameter.
str - the string to be compared.
equalsToIgnoreCase() Return Value:
returns true if the strings are equal, ignoring case considerations.
returns false if the strings are not equal.
returns false if the str argument is null.

The Java String compareTo() method compares two strings lexicographically (in the dictionary order). The comparison is based on the Unicode value of each character in the strings.

The syntax of the compareTo() method is:
string.compareTo(String str)
Here, string is an object of the String class.
compareTo() Parameters:
The compareTo() method takes a single parameter.
str - the string to be compared.
compareTo() Return Value:
returns 0 if the strings are equal.
returns a negative integer if the string comes before the str argument in the dictionary order.
returns a positive integer if the string comes after the str argument in the dictionary order.