ResourceBundle.Control getTimeToLive(String, Locale) in Java

getTimeToLive(String, Locale): This method is available in java.util.ResourceBundle.Control class of Java.

Syntax:

long java.util.ResourceBundle.Control.getTimeToLive(String baseName, Locale locale)

This method takes two arguments. This method returns the time-to-live (TTL) value for resource bundles that are loaded under this ResourceBundle.Control.

Note:

1. Positive time-to-live values specify the number of milliseconds a bundle can remain in the cache without being validated against the source data from which it was constructed.

2. The value 0 indicates that a bundle must be validated each time it is retrieved from the cache.

3. TTL_NO_EXPIRATION_CONTROL specifies that loaded resource bundles are put in the cache with no expiration control.

Parameters: Two parameters are required for this method.

baseName: the base name of the resource bundle for which the expiration value is specified.

locale: the locale of the resource bundle for which the expiration value is specified.

Returns: the time (0 or a positive millisecond offset from the cached time) to get loaded bundles expired in the cache, TTL_NO_EXPIRATION_CONTROL to disable the expiration control, or TTL_DONT_CACHE to disable caching.

Throws:

NullPointerException - if baseName or locale is null

Approach 1: When no exception

Java

import java.util.Locale;
import java.util.ResourceBundle;
import java.util.ResourceBundle.Control;

public class ResourceBundleControlgetTimeToLive {
    public static void main(String[] args) {

        ResourceBundle.Control reControl = 
    ResourceBundle.Control.getControl(Control.FORMAT_DEFAULT);

        String baseName = "Hello";
        Locale locale = Locale.US;
        System.out.println(reControl.getTimeToLive(
                                   baseName, locale));
    }
}

Output:

-2

Approach 2: NullPointerException 

Java

import java.util.Locale;
import java.util.ResourceBundle;
import java.util.ResourceBundle.Control;

public class ResourceBundleControlgetTimeToLive {
    public static void main(String[] args) {

        ResourceBundle.Control reControl = 
 ResourceBundle.Control.getControl(Control.FORMAT_DEFAULT);

        String baseName = null;
        Locale locale = Locale.US;
        System.out.println(reControl.getTimeToLive(
                                   baseName, locale));
    }
}

Output:

Exception in thread "main" java.lang.NullPointerException
	at java.base/java.util.ResourceBundle$Control.getTimeToLive(ResourceBundle.java:3304)