Java tutorial
//package com.java2s; import java.util.HashMap; import java.util.Map; public class Main { private static final Map KEYSIZES = new HashMap(); static int getKeySize(String algorithm) { if (!KEYSIZES.containsKey(algorithm)) { throw new IllegalStateException("no key size for algorithm: " + algorithm); } return ((Integer) KEYSIZES.get(algorithm)).intValue(); } }