RuleBasedCollator equals() method in Java with Example

The java.text.RuleBasedCollator class has an equals() function. A collator class is used to determine whether or not the two strings that are supplied are identical.

Syntax:

Parameter: In order to compare two strings, this method requires two strings.

Return Value: It will return true if the two strings are equal and false if they are not.

Example 1:

The code illustrates how to compare custom strings in Java using the RuleBasedCollator class. The characters are ordered according to a custom ordering rule ("< a < b < c < d") that is created when a RuleBasedCollator object is created. The equals() function of the collator is then used to compare two strings, "a" and "A," to see if they are deemed equivalent according to the established rules. "a" and "A" are treated as unequal since RuleBasedCollator is case-sensitive, and no case-insensitive rules are supplied; this leads to the output that they are not equal. If the rule syntax is incorrect, a ParseException could be handled by the try-catch block.

Implementation:

FileName: RulebasedCollatorExample1.java

Output:

 
The a is not equal to the A   

Example 2:

A custom rule is used in this code to compare two identical strings, "a" and "a," using Java's RuleBasedCollator. The rule that specifies the character order ("< a < b < c < d") is initialized in the collator. Based on their similarity, the collator's equals() function verifies that the two strings are equal. While the rule in this instance is legitimate, the try-catch block manages any ParseException that might arise from an invalid rule.

Implementation:

FileName: RulebasedCollatorExample2.java

Output:

 
The a is equal to the a