Tests whether JCE is installed or not

TestJCE.java

public class TestJCE {

   public static void main(String[] args) {
        try {
            int maxKeyLen = javax.crypto.Cipher.getMaxAllowedKeyLength("AES");
            System.out.println(maxKeyLen);
        } catch (Exception e) {
            e.printStackTrace();
        }
        
   }
}

// Then run:
// javac TestJCE.java
// java -cp . TestJCE
// Returns 2147483647 if installed. Otherwise it is not installed.