How to Resolve 'Cannot Resolve Method 'of' in 'ImmutableList' Error

How can I fix the 'Cannot resolve method 'of' in 'ImmutableList'' error when using ImmutableList in Java?

import com.google.common.collect.ImmutableList;

The 'Cannot resolve method 'of' in 'ImmutableList'' error typically occurs when the necessary library is not included in your project's dependencies or when the method is used incorrectly. By ensuring that the correct library is added and that the method is called properly, this issue can be resolved.

import com.google.common.collect.ImmutableList;

public class Example {
    public static void main(String[] args) {
        ImmutableList<String> list = ImmutableList.of("Hello", "World");
        System.out.println(list);
    }
}

Causes

• The Guava library is not included in the project.
• Incompatible version of Guava is being used that does not support the 'of' method.
• Incorrect usage syntax for the 'ImmutableList.of' method.

Solutions

• Add the Guava dependency to your project, for example in Maven: ` <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>31.0.1-jre</version> </dependency> `
• Ensure that you are using a version of Guava that includes the 'of' method (version 14.0 and above).
• Correctly call the method with the appropriate parameters: `ImmutableList.of(item1, item2, item3);`.

Mistake: Not adding the Guava library to the project's dependencies.

Solution: Add the Guava library to your build configuration.

Mistake: Using an outdated version of Guava that lacks the 'of' method.

Solution: Update Guava to at least version 14.0 or later.

Mistake: Incorrect method usage syntax.

Solution: Ensure you are using `ImmutableList.of(...)` with the correct parameters.