How to import java.util.Scanner – eclipse?

Importing the java.util.Scanner class in Eclipse is straightforward. Here’s a step-by-step guide:

Steps to Import java.util.Scanner in Eclipse

1. Create a Java Project

• Open Eclipse.
• Click on File > New > Java Project.
• Give your project a name (e.g., ScannerExample) and click Finish.

2. Create a Java Class

• Right-click on the src folder in your project.
• Select New > Class.
• Provide a class name (e.g., ScannerDemo) and click Finish.

3. Write Code and Import java.util.Scanner

• At the top of your Java class, add the import statement for java.util.Scanner.
• Eclipse often suggests the correct import automatically. If you type Scanner and hover over it, Eclipse will prompt you to add the import.

Manually Add Import

Add this line at the top of your file:

import java.util.Scanner;

Example Code

import java.util.Scanner;

public class ScannerDemo {
    public static void main(String[] args) {
        // Create a Scanner object to read user input
        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter your name: ");
        String name = scanner.nextLine(); // Read user input

        System.out.println("Hello, " + name + "!"); // Display output

        // Close the scanner to release resources
        scanner.close();
    }
}

Shortcut to Import Scanner Automatically

1. Start typing Scanner in your code.
2. Hover over Scanner or press Ctrl + Shift + O (Windows/Linux) or Command + Shift + O (Mac). This will organize and automatically add imports for unresolved references.

Running the Program

1. Save the file (Ctrl + S or Command + S).
2. Right-click on the file in the Project Explorer and select Run As > Java Application.
3. Enter your input in the console when prompted.

Troubleshooting

• If Eclipse doesn’t recognize Scanner:
  • Ensure the Java Development Kit (JDK) is configured correctly in Eclipse.
  • Go to Window > Preferences > Java > Installed JREs and verify that a valid JDK is selected.
• “Cannot find symbol” error for Scanner:
  • Ensure import java.util.Scanner; is present.
  • Ensure you’re not accidentally overriding the Scanner class name.

Let me know if you need further help with Eclipse! 😊