如何替换断言？

Question

如何用if代替断言？例：

public Wezel<Wartosc,Indeks> getWujek() 
    {
        assert rodzic != null; // Root node has no uncle
        assert rodzic.rodzic != null; // Children of root has no uncle
        return rodzic.getBrat();
    }

Answer 1

断言大致等于：

if (!condition) {
    throw new AssertionError();
}