ResourceBundle.getBundle(String, Locale) in Java

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

Syntax:

ResourceBundle java.util.ResourceBundle.getBundle(String baseName, Locale locale)

This method takes two arguments. This method gets a resource bundle using the specified base name and locale, and the caller module.

Parameters: Two parameters are required for this method.

baseName: the base name of the resource bundle, a fully qualified class name.

locale: the locale for which a resource bundle is desired.

Returns: a resource bundle for the given base name and locale.

Throws:

1. NullPointerException - if baseName or locale is null.

2. MissingResourceException - if no resource bundle for the specified base name can be found.

Approach 1: When no exception

Java

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

public class ResourceBundlegetBundle3 {
    public static void main(String[] args) {

        String baseName = "Hello";

        System.out.println(ResourceBundle.getBundle(baseName,
                                     Locale.US));
    }
}

Output:

java.util.PropertyResourceBundle@3567135c

Approach 2: NullPointerException 

Java

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

public class ResourceBundlegetBundle3 {
    public static void main(String[] args) {

        String baseName = null;

        System.out.println(ResourceBundle.getBundle(baseName,
                                         Locale.US));
    }
}

Output:

Exception in thread "main" java.lang.NullPointerException: Cannot invoke "String.hashCode()" because "this.name" is null
	at java.base/java.util.ResourceBundle$CacheKey.hashCode(ResourceBundle.java:744)
	at java.base/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
	at java.base/java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1629)
	at java.base/java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1593)
	at java.base/java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1556)
	at java.base/java.util.ResourceBundle.getBundle(ResourceBundle.java:932)