Hi, I'm trying to start a class under eclipse that return en exception in
thread "main". I executed many codes without any broken message. How to fix
that ? Thanks in advance.

# The class :
//Polymorphisme 02

class Shape {

void draw() {}
void erase() {}

}

class Circle extends Shape {

void draw() {
 System.out.println("Circle.draw()");
}
void erase() {
 System.out.println("Circle.erase()");
}

}

class Square extends Shape {

void draw() {
 System.out.println("Square.draw()");
}
void erase() {
 System.out.println("Square.erase()");
}

}

class Triangle extends Shape {

void draw() {
 System.out.println("Triangle.draw()");
}
void erase() {
 System.out.println("Triangle.erase()");
}

}

public class Shapes {

public static Shape randShape() {

 switch((int) (Math.random()*3)) {

  default:
  case 0: return new Circle();
  case 1: return new Square();
  case 2: return new Triangle();

 }

}

public static void main(String[] args) {

 Shape[] s=new Shape[9];
 //Remplissage du tableau avec des formes [shapes]:
 for (int i= 0; i<s.length;i++)
  s[i]=randShape();
 //Appel polymorphe des méthodes
 for(int i=0;i<s.length;i++)
  s[i].draw();

}
}

# In the console :
java.lang.NoClassDefFoundError: shape (wrong name: Shape)

at java.lang.ClassLoader.defineClass0(Native Method)

at java.lang.ClassLoader.defineClass(Unknown Source)

at java.security.SecureClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.defineClass(Unknown Source)

at java.net.URLClassLoader.access$100(Unknown Source)

at java.net.URLClassLoader$1.run(Unknown Source)

at java.security.AccessController.doPrivileged(Native Method)

at java.net.URLClassLoader.findClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClass(Unknown Source)

at java.lang.ClassLoader.loadClassInternal(Unknown Source)

Exception in thread "main"