Eclipse Generic Warning : Type safety: Unchecked cast from T to E -

how can avoid generic warnings in following code? eclipse generic warning : type safety: unchecked cast t e

is there way improve code. putting , removing values stack.

public static <t, k, e> void genericstack(t a, k b) {     stack<e> st = new stack<e>();     st.push((e) a);     st.push((e) b);     b = (k) st.pop();     = (t) st.pop(); }