RuleBasedCollator getCollationKey() method in Java with Example

The getCollationKey() method of java.text.RuleBasedCollator class is used to get the series of bit converted from string passed into it.
Syntax:

public CollationKey getCollationKey(String source)

Parameter: This method accepts the string object as a parameter.
Return Value: This method returns the series of bit converted from the string passed into it.
Below are the examples to illustrate the getCollationKey() method:
Example 1:

Java

// Java program to demonstrate
// getCollationKey() method

import java.text.*;
import java.util.*;
import java.io.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {

            // Creating and initializing
            // new simple rule
            String simple
                = "< a < b < c < d";

            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);

            // getting series of bits
            // using getCollationKey() method
            CollationKey key
                = col.getCollationKey("Geek");

            // display result
            System.out.println(
                "Series of bits are :- "
                + key.getSourceString());
        }

        catch (ClassCastException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

Series of bits are :- Geek

Example 2:

Java

// Java program to demonstrate
// getCollationKey() method

import java.text.*;
import java.util.*;
import java.io.*;

public class GFG {
    public static void main(String[] argv)
    {
        try {

            // Creating and initializing
            // new simple rule
            String simple
                = "< a < b < c < d";

            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);

            // getting series of bits
            // using getCollationKey() method
            CollationKey key
                = col.getCollationKey("G_f_G");

            // display result
            System.out.println(
                "Series of bits are :- "
                + key.getSourceString());
        }

        catch (ClassCastException e) {

            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {

            System.out.println("Exception thrown : " + e);
        }
    }
}

Output:

Series of bits are :- G_f_G

Reference: https://docs.oracle.com/javase/9/docs/api/java/text/RuleBasedCollator.html#getCollationKey-java.lang.String-