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DEV2.1/CM1/Exercice4/Debut.java

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+//MELIANI SAMY (TP1)
+import java.awt.*;
+import javax.swing.*;
+import java.awt.event.*;
+
+public class Debut {
+    public static void main(String[] args) {
+        JFrame fenetre = new JFrame("");
+        fenetre.setSize(650,650);
+        fenetre.setLocation(0, 0);
+        fenetre.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+        Debut2 appel1 = new Debut2();
+        Debut3 appel2 = new Debut3(appel1);
+        fenetre.addMouseListener(appel2);
+        fenetre.add(appel1);
+        fenetre.setVisible(true);
+    }
+}

DEV2.1/CM1/Exercice4/Debut2.java

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+//MELIANI SAMY (TP1)
+import java.awt.Color;
+import java.awt.Graphics;
+import javax.swing.JComponent;
+
+public class Debut2 extends JComponent {
+    private int rayon;
+    public Debut2(){
+        super();
+        rayon = 60;
+    }
+
+    public void getrayon(int radius){
+        this.rayon=radius;
+        this.repaint();
+    }
+
+    @Override
+    public void paintComponent(Graphics pinceau){
+        Graphics secondPinceau=pinceau.create();
+        if(this.isOpaque()){
+            secondPinceau.setColor(this.getBackground());
+            secondPinceau.fillRect(0, 0, this.getWidth(), this.getHeight());
+        }
+        secondPinceau.setColor(new Color(115,194,251));
+        secondPinceau.fillRect(0,0,this.getWidth(),this.getHeight());
+        secondPinceau.setColor(Color.YELLOW);
+        secondPinceau.fillOval((this.getWidth()/2)-(this.rayon/2), (this.getHeight())-(this.rayon/2), this.rayon, this.rayon);    
+    }
+}

DEV2.1/CM1/Exercice4/Debut3.java

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+//MELIANI SAMY (TP1)
+import java.awt.*;
+import javax.swing.*;
+import java.awt.event.*;
+
+public class Debut3 implements MouseListener{
+    private int rayon;
+    private Debut2 ref;
+    public Debut3(Debut2 appel){
+        super();
+        this.rayon=60;
+        this.ref=appel;
+    }
+    public void mouseEntered(MouseEvent evenement){}
+    public void mousePressed(MouseEvent evenement){}
+    public void mouseReleased(MouseEvent evenement){}
+    public void mouseExited(MouseEvent evenement){}
+    public void mouseClicked(MouseEvent evenement){
+        this.rayon+=20;
+        ref.getrayon(this.rayon);
+    }   
+
+    }