How to resolve the "java.lang.exceptionininitializererror" error

The ExceptionInInitializerError is a sub-class of the LinkageError class. The error denotes that an unexpected exception has occurred in a static initializer or the initializer for a static variable.

The following code gives an error on line $13$ .

class Example {
 
     private static String message = null;
     private static String subMessage = null;
 
     public Example(String message) {
          Example.message = message;
     }
 
     static {
          /* Store the first 10 characters of the input message. */
          subMessage = message.substring(0, 10);
     }
 
     public String getSubMessage() {
          return subMessage;
     }
 
     public static void main(String[] args) {
          Example exampleClass = new Example("Test");
          System.out.println(exampleClass.getSubMessage());
     }
}

How to resolve the "java.lang.exceptionininitializererror" error

How to solve this exception