How to Implement Autocomplete with JTextfield and JList?

AutoComplete with JTextfield and JList

Problem:
Implementing auto-completion using JTextfield and JList, where a list of suggestions appears as characters/strings are entered into the text field.

Solution:

1. Data Preparation:

   • Sort the list of suggestions for efficient performance.

2. Classes:

   • Utilize two classes:

     • Java2sAutoTextField for the text field with auto-completion functionality.
     • Java2sAutoComboBox for the combo box with auto-completion.

3. Initialization:

   • Set initial values for improved behavior and appearance.

Example Code:

// Import necessary libraries

public class AutoCompleteTextField {

    // Class members

    public static void main(String[] args) {
        // UI initialization

        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                // Create an instance of the AutoCompleteTextField class
            }
        });
    }
}

Output:

Additional Notes:

• Define a list of strings to provide suggestions.
• Set prototypes for the display value of the combo box to accommodate longer items.
• Adjust the font, color, and background for customization.
• Use getText() and setText() to set and retrieve the text in the text field.

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