Modfier la couleur d'une ligne dans jtable selon la condition if.

import java.awt.*;
import javax.swing.*;
import javax.swing.table.TableCellRenderer;
import java.time.LocalDate;

public class Test {
    public static void main(String[] args) {
        Object[][] rowData = { //
                { "Mars", LocalDate.of(2020, 3, 1) }, // Rouge
                { "Avril", LocalDate.of(2020, 4, 1) }, // Rouge
                { "Mai", LocalDate.of(2020, 5, 1) }, // Vert
                { "Juin", LocalDate.of(2020, 6, 1) }, // Vert
                { "Juillet", LocalDate.of(2020, 7, 1) }, // Rouge
        };
        Object[] columnNames = { "Label", "Date" };

        JTable table = new JTable(rowData, columnNames) {
            @Override
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
                Component result = super.prepareRenderer(renderer, row, column);
                result.setBackground(isGreenRow(row) ? Color.GREEN : Color.RED);
                return result;
            }

            private boolean isGreenRow(int row) {
                LocalDate minimumAllowed = LocalDate.now().minusMonths(1);
                LocalDate maximumAllowed = LocalDate.now().plusMonths(1);
                LocalDate date = (LocalDate) getValueAt(row, 1);
                return date.isAfter(minimumAllowed) && date.isBefore(maximumAllowed);
            }
        };

        JFrame frame = new JFrame();
        frame.add(table, BorderLayout.CENTER);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}