How do I ignore Java Lang NullPointerException?

Answer: Some of the best practices to avoid NullPointerException are:

1. Use equals() and equalsIgnoreCase() method with String literal instead of using it on the unknown object that can be null.
2. Use valueOf() instead of toString() ; and both return the same result.
3. Use Java annotation @NotNull and @Nullable.

How do you handle null point exception?

The NullPointerException can be avoided using checks and preventive techniques like the following:

1. Making sure an object is initialized properly by adding a null check before referencing its methods or properties.
2. Using Apache Commons StringUtils for String operations e.g. using StringUtils.

How do you handle NullPointerException in Java explain with an example?

Java NullPointerException

1. 3.1. Use Ternary Operator.
2. 3.2. Use Apache Commons StringUtils for String Operations.
3. 3.3. Fail Fast Method Arguments.
4. 3.4. Consider Primitives instead of Objects.
5. 3.5. Carefully Consider Chained Method Calls.
6. 3.6. Use valueOf() in place of toString()
7. 3.7. Avoid Returning null from Methods.
8. 3.8.

What is Java lang?

Provides classes that are fundamental to the design of the Java programming language. The most important classes are Object , which is the root of the class hierarchy, and Class , instances of which represent classes at run time.

How do you handle null values in a dataset?

This article covers 7 ways to handle missing values in the dataset:

1. Deleting Rows with missing values.
2. Impute missing values for continuous variable.
3. Impute missing values for categorical variable.
4. Other Imputation Methods.
5. Using Algorithms that support missing values.
6. Prediction of missing values.

Can we handle error in Java?

Yes, we can catch an error. The Throwable class is the superclass of all errors and exceptions in the Java language. Only objects that are instances of this class (or one of its subclasses) are thrown by the Java Virtual Machine or can be thrown by the throw statement.