How to Resolve the 'Cannot Resolve Symbol NameValuePair' Error in Java?

What does 'Cannot resolve symbol NameValuePair' mean in Java and how can I fix it?

The error message 'Cannot resolve symbol NameValuePair' typically indicates that the Java compiler cannot find the definition for the NameValuePair class. This often occurs due to missing dependencies or incorrect import statements in your code.

// Example usage of NameValuePair
import org.apache.http.NameValuePair;
import org.apache.http.message.BasicNameValuePair;

public class Main {
    public static void main(String[] args) {
        NameValuePair pair = new BasicNameValuePair("key", "value");
        System.out.println(pair.getName() + " = " + pair.getValue());
    }
}

Causes

• The Apache HttpComponents library is not included in your project dependencies.
• The correct import statement for NameValuePair is missing.
• Typographical errors in the class name or package.

Solutions

• Ensure that you have added the Apache HttpComponents library to your project. You can include it using Maven or Gradle.
• Add the missing import statement: ```java import org.apache.http.NameValuePair; ```
• Check for typos in the class name and package.

Mistake: Not including the necessary Apache HttpComponents library.

Solution: Add the dependency in your `pom.xml` for Maven or `build.gradle` for Gradle.

Mistake: Forgetting to import the NameValuePair class.

Solution: Add the appropriate import statement at the beginning of your Java file.

Mistake: Using the wrong version of the library that does not contain NameValuePair.

Solution: Ensure you are using the correct version of Apache HttpComponents that includes the class.