rui_demo.java

	@Test
	public void rui(){
		//HashSet Global
		//Poderia ser um HashTree caso você queira uma esturura de arvore
		HashSet<Set<String>> hs = new HashSet<>();
		
		HashSet<String> dset0 = new HashSet<String>();
		dset0.add("String 1");
		
		HashSet<String> dset1 = new HashSet<String>();
		dset1.add("String 2");
		
		HashSet<String> dset2 = new HashSet<String>();
		dset2.add("String 3");
		
		HashSet<String> dset3 = new HashSet<String>();
		dset3.add("String 4");
		
		hs.add(dset0);
		hs.add(dset1);
		hs.add(dset2);
		hs.add(dset3);
		
		Iterator<Set<String>> iterator = hs.iterator();
		while (iterator.hasNext()) {
			System.out.print(iterator.next() + " ");
		}
	}