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   | class Epoint 
{ public Epoint(int x, int y) throws ErrConst 
	{if((x<0) || (y<0)) throw new ErrConst();
     this.x=x ; this.y=y;}
 
	 public void deplace(int dx, int dy) throws ErrDepl
	{ if((x+dx)<0 || (y+dy)<0) throw new ErrDepl();
	 x+=dx; y=+dy;}
 
	 public void affiche()
		{System.out.println("coordonnée "+x+" , "+y);}
 
	 class ErrConst extends Exception
	 {
	 }
 
	 class ErrDepl extends Exception
	 {
	 }
 private int x, y;
}
public class Except1{
 
	public static void main(String[] args) 
	{
		try
		{
			Epoint a= new Epoint(1, 4);
			a.affiche();
			a.deplace(-3,5);
			a= new Epoint(-3,5);
			a.affiche();
 
		}
		catch (ErrConst e)
		{ System.out.println("Erreur de construction");
		System.exit(-1);}
 
		catch(ErrDepl e)
		{System.out.println("Erreur de deplacement");
		System.exit(-1);}
	}
}
 
 
========================Voici le message :================
 
C:\revision>javac Except1.java
Except1.java:39: error: cannot find symbol
                catch(ErrDepl e)
                      ^
  symbol:   class ErrDepl
  location: class Except1
1 error | 
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