How to check if my string is equal to null?

To check if a string is equal to null in Java, you can use the == operator.

Here is an example of how you can check if a string is null:

String str = null;
if (str == null) {
    // The string is null
}

Alternatively, you can use the Objects.isNull() method from the java.util.Objects class, like this:

import java.util.Objects;

String str = null;
if (Objects.isNull(str)) {
    // The string is null
}

Note that you should not use the equals() method to check if a string is null, because this will result in a NullPointerException if the string is indeed null.

Here is an example of what not to do:

String str = null;
if (str.equals(null)) {  // This will throw a NullPointerException
    // The string is null
}