This topic is about Java 14 – Helpful NullPointerException.
Java 14 introduces NullPointerException with helpful information in case -XX:+ShowCodeDetailsInExceptionMessages flag is passed to JVM.
Example
Consider the following example −
public class APITester {
public static void main(String[] args) {
String message = null;
System.out.println(message.length());
}
}
Old Way: Compile and Run the program
$javac APITester.java $java APITester
Output
Exception in thread "main" java.lang.NullPointerException at APITester.main(APITester.java:6)
New Way: Compile and Run the program with new Flag
$javac APITester.java $java -XX:+ShowCodeDetailsInExceptionMessages APITester
Output
Exception in thread "main" java.lang.NullPointerException: Cannot invoke "String.length()" because "<local1>" is null at APITester.main(APITester.java:6)
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