Sort

src/Mediana.java

@@ -0,0 +1,29 @@
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.ArrayList;
+import java.util.Random;
+
+public class Mediana{
+    public static void main(String [] args){
+
+        ArrayList<Integer> list =new ArrayList<Integer>();
+        Random rand = new Random();
+        for(int i=0; i<rand.nextInt(100); i++){
+            list.add(rand.nextInt(100));
+        }
+        Comparator<Integer> cmp=new IntComparator();
+        Collections.sort(list, cmp);
+
+        for(Integer item: list){
+            System.out.println(item);
+        }
+    
+    }
+
+}
+
+class IntComparator implements Comparator<Integer>{
+    public int compare(Integer i1, Integer i2){
+        return (-1)*i1.compareTo(i2);
+    }
+}

src/Nomi/Anagrafe.java

@@ -1,11 +1,15 @@
 import java.util.Scanner;
-import java.util.ArrayList;
+import java.util.Set;
+import java.util.TreeSet;
 import java.io.PrintStream;
+import java.util.ArrayList;
+import java.util.Comparator;
 
 public class Anagrafe{
 
     public Anagrafe(Scanner sc)throws Exception{
-        registro = new ArrayList<Persona>();
+        Comparator<Persona> cmp=new PersonaComparator();
+        registro = new TreeSet<Persona>(cmp);
         Persona p = Persona.read(sc);
         while(p!=null){
             registro.add(p);
@@ -14,7 +18,7 @@ public class Anagrafe{
     }
 
     private Anagrafe(ArrayList<Persona> registro){
-        this.registro=registro;
+        //this.registro=registro;
     }
 
     public void print(PrintStream ps){
@@ -43,6 +47,19 @@ public class Anagrafe{
         
     }
 
-    private ArrayList<Persona> registro;
+    private Set<Persona> registro;
 
 }
+
+class PersonaComparator implements Comparator<Persona>{
+    public int compare(Persona p1, Persona p2){
+        int cmp=p1.getDataDiNascita().compareTo(p2.getDataDiNascita());
+        if(cmp==0){
+            cmp=p1.getCognome().compareTo(p2.getCognome());
+            if(cmp==0){
+                cmp=p1.getNome().compareTo(p2.getNome());
+            }
+        }
+        return cmp;
+    }
+}

src/Nomi/Persona.java

@@ -49,6 +49,7 @@ public class Persona{
         ps.println(nome);
         ps.println(cognome);
         ps.println(sdf.format(dataDiNascita));
+        ps.println("*****");
 
     }
 

src/Nomi/Test.java

@@ -7,7 +7,5 @@ public class Test{
         Scanner sc = new Scanner(fl);
         Anagrafe an=new Anagrafe(sc);
         an.print(System.out);
-        System.out.println("*******");
-        an.filtroCognome("due").filtroNome("noemi").print(System.out);
     }
 }

src/Nomi/persone.dat

@@ -1,9 +1,18 @@
-pappa
-papsp
+Raffaele
+Mignone
 12/12/1999
-dffdfd
-dhdhdh
+Aaa
+Manganiello
 14/08/1990
+Salvatore
+Manganiello
+14/08/1990
+Francesco
+Martignetti
+15/08/1990
+Raffaele
+Mignone
+12/12/2000
 noemi
 dhhf
 13/05/1200