How to Optimize JTable Synchronization with Backend Data Structures While Maintaining Data Integrity?

Optimizing JTable Synchronization with Backend Data Structure

The task at hand involves maintaining synchronization between a JTable and a structured data structure, specifically a NavigableMap. A potential concern arises when allowing user edits to the JTable: either keep the data structure constantly updated or recreate it upon user action completion.

Balancing Synchronization

While maintaining real-time synchronization with the data structure can provide immediate updates, it introduces a potential performance overhead. On the other hand, recreating the data structure only after user input is complete eliminates ongoing synchronization but potentially slows down processing.

Optimal Approach: Deferred Recreation

Upon careful consideration, we recommend recreating the data structure after the user completes editing. This approach offers several advantages:

• Efficiency: Reduces processing overhead by avoiding constant synchronization.
• Controlled Precision: Allows for a clean and controlled recreation process.
• Robustness: Eliminates potential synchronization errors or data inconsistencies.

Data Validation: Range Control

To ensure data integrity, we can implement data validation for user edits. For your specific use case, this involves limiting user input to values within specified ranges (e.g., between 12.1 and 45.6).

We suggest using a custom editor that prompts the user with a dialog featuring separate text fields for each range value. This enables precise input control within the specified boundaries.

Custom Editor

Here's a sample implementation of a custom editor that supports range validation:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;

class RangeEditor extends AbstractCellEditor implements TableCellEditor {
  private final double MIN = 12.1;
  private final double MAX = 45.6;

  private JTextField textField;
  private Double value;

  @Override
  public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
    if (value instanceof Double) value = (Double) value;
    double dValue = (value != null && value instanceof Double) ? (Double) value : null;
    String textValue = (dValue != null) ? dValue.toString() : "";

    textField = new JTextField(textValue, 10);
    textField.setInputVerifier(new InputVerifier() {
      @Override
      public boolean verify(JComponent input) {
        String text = ((JTextField) input).getText();
        try {
          double dText = Double.parseDouble(text);
          return (dText >= MIN && dText <= MAX);
        } catch(NumberFormatException e) {
          return false;
        }
      }
    });
    return textField;
  }

  @Override
  public Object getCellEditorValue() {
    String text = textField.getText();
    double dValue = (text != null && !text.isEmpty()) ? Double.parseDouble(text) : null;
    return dValue;
  }
}

This editor enforces the specified range limits, ensuring data integrity and avoiding potential data corruption.

The above is the detailed content of How to Optimize JTable Synchronization with Backend Data Structures While Maintaining Data Integrity?. For more information, please follow other related articles on the PHP Chinese website!