View difference between Paste ID: JMrHZYV3 and 09Cf3zc5

 import java.util.Iterator;
 import java.util.Scanner;
 import java.util.Vector;
 /**
  *
  * @author Tibi
  */
-public class DataSet extends Vector {
+public class DataSet {
 
-    Vector vector;
+    public Vector vector;
 
     public DataSet() {
-        super();
+	vector = new Vector();
     }
 
     public DataSet( DataSet obj ) {
-        super(obj);
+        vector = obj.vector;
     }
 
     public void fill() {
         Scanner sc = new Scanner( System.in );
         System.out.println( "Adja meg az input hosszat!" );
         int num = sc.nextInt();
-        int x;
+        int x;
-        vector = new Vector();
+
         for( int i = 0; i < num; i++ ) {
             x = sc.nextInt();
             vektor.add( new Data( x ) );
-            this.add( new Data( x ) );
+
     }
     @Override
     public String toString() {
         String s = new String();
         Iterator it = iterator();
 
         while( it.hasNext() ) {
             s += ( (Data)it.next() ).a + " ";
-            s += ( (Data)it.next() ).a+" ";
+
         return s;
     }
 
 }
 
 
 /**
  *
  * @author Tibi
  */
 public class Data implements Comparable {
     public Integer a;
 
     public Data(){
         a = 0;
     }
 
     public Data( Integer aa ) {
         a = aa;
     }
 
     public Data( Data obj ) {
         a = obj.a;
     }
 
     @Override
     public int compareTo( Object obj ) {
         Data tmp = (Data) obj;
 
         if( a > tmp.a ) {
             return 1;
         }
         if( a < tmp.a ) {
             return -1;
         }
         return 0;
     }
 
     @Override
     public String toString() {
         return "a: " + a;
     }
 }
 
 
 
 import java.util.Collections;
 import java.util.Scanner;
 
 public class SortAndSearch {
     public static void main( String[] args ) {
         DataSet ds = new DataSet();
         ds.fill();
 
         System.out.println( ds.toString() );
         //Rendezzük a ds obejektumunkat.
         Collections.sort( ds );
         System.out.println( ds.toString() );
     }
 }