Ajout de la couleur lors du clique

src/main/View.java

@@ -3,7 +3,10 @@ package main;
 import javax.imageio.ImageIO;
 import javax.swing.*;
 import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
 import java.io.File;
+import java.util.Collection;
 
 public class View extends JFrame {
 
@@ -28,6 +31,7 @@ public class View extends JFrame {
         panimg.setLayout(new GridLayout(5,4));
         for (int i=0;i<20;i++){
             JButton button = new JButton();
+            button.setBackground(Color.RED);
             button.setSize(new Dimension(200,200));
             try {
                 ImageJul julImg =  new ImageJul(new Jul());
@@ -37,6 +41,11 @@ public class View extends JFrame {
             } catch (Exception ex) {
                 ex.printStackTrace();
             }
+            button.addActionListener(e -> {
+                Color bg = button.getBackground().equals(Color.GREEN) ? Color.RED: Color.GREEN;
+                button.setBackground(bg);
+
+            });
             panimg.add(button);
         }