public IntList copyRange(int start, int end) {
        int j=0;
        IntList a= new IntList(this.get(start).info,null);

        for(IntList p = this.get(start+1); p!=null; p=p.next) {
            a.append(p.info);
            System.out.print(p.info);
        }
        
        IntList b= this.get(end);
        b.next= null;
        
        return a;
    }

public IntList clone(){
        IntList b = new IntList(this.info, null);
        
        while(this.next != null){
            b.append(this.next.info);
            next = next.next;
        }       
        return b;
    }