📦 NEW: add Geometrie.java

Signed-off-by: Jonas Sulzer <jonas@violoncello.ch>

src/Ex_06/Geometrie.java

+package Ex_06;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Scanner;
+
+public class Geometrie {
+
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        Triangle triangle = new Triangle();
+        for (int i = 0; i < 3; i++) {
+            System.out.println("Construction d'un nouveau point");
+            System.out.print("Veuillez entrer x : ");
+            double x = scanner.nextDouble();
+            System.out.print("Veuillez entrer y : ");
+            double y = scanner.nextDouble();
+
+            triangle.addPoint(x, y);
+        }
+
+        System.out.println("Périmètre : " + triangle.getPerimeter());
+        if (triangle.isIsocele()) {
+            System.out.println("Le triangle est isocèle");
+        }
+
+    }
+
+
+}
+
+class Triangle {
+    private ArrayList<Point> points = new ArrayList<Point>();
+
+    public void addPoint(double x, double y) {
+        points.add(new Point(x, y));
+    }
+
+    public double getPerimeter() {
+        double perimeter = 0.0;
+
+        for (int i = 0; i < 3; i++) {
+            double x1 = points.get(i).getX();
+            double y1 = points.get(i).getY();
+            double x2 = points.get((i < 2 ? i+1 : 0)).getX();
+            double y2 = points.get((i < 2 ? i+1 : 0)).getY();
+
+            perimeter += Math.sqrt(Math.abs((x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2)));
+        }
+
+        return perimeter;
+    }
+
+    public boolean isIsocele() {
+        double[] distances = new double[3];
+        for (int i = 0; i < 3; i++) {
+            double x1 = points.get(i).getX();
+            double y1 = points.get(i).getY();
+            double x2 = points.get((i < 2 ? i+1 : 0)).getX();
+            double y2 = points.get((i < 2 ? i+1 : 0)).getY();
+
+            distances[i] = Math.sqrt(Math.abs((x1 - x2)*(x1 - x2) + (y1 - y2)*(y1 - y2)));
+        }
+
+        if (distances[0] == distances[1] && distances[1] == distances[2]) {
+            return true;
+        }
+        return false;
+    }
+
+
+}
+
+class Point {
+    private double x;
+    private double y;
+
+    public Point(double x, double y) {
+        this.x = x;
+        this.y = y;
+    }
+
+    public double getX() {
+        return x;
+    }
+    public double getY() {
+        return y;
+    }
+}
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