Dostep do elementow tablicy przez char?

int[] tab = new int[256];
for (int i = 0; i < tab.length; i++) tab[i] = i;
System.out.println(tab['b']); // Wypisze '98'

Object obj = new Object();
Object obj2;
AsocTbl<Object> TabAsoc = new AsocTbl<Object>(dlugosc);
TabAsoc.setItem("Tekst",obj);
obj2 = TabAsoc.item("Tekst");

Map<String, Object> hm = new HashMap<String, Object>();

hm.put("element1", new Object());
hm.put("element2", new Object());
        
System.out.println(hm.get("element1"));
System.out.println(hm.get("element2"));