String values to boolean check

String values to boolean check

I have four string falgs get these values as string a[].
falg1 = Y or N
falg2= Y or N
falg3= Y or N
falg4= Y or N
Based on above falgs ,i am checking the below cases.Is it correct way of
doing it or do you have any better appraoch?
if (falg1.equals("Y")) {
if (falg2.equals("Y")) {
if (falg3.equals("Y") && falg4.equals("Y")) {
condition = true;
} else
condition = flase;
} else
return null;
} else
return null;