Check if JCE is installed in Java / JRE / JDK

TestJCE.java

import javax.crypto.Cipher;

class Test {
  public static void main(String[] args) {
    try {
      int maxKeyLen = Cipher.getMaxAllowedKeyLength("AES");
      System.out.println("JCE installed: ".concat(String.valueOf(maxKeyLen >= 256)));
    } catch (Exception e){
      System.out.println(e);
    }
  }
}