Do you need to explicity close a Java KeyStore input stream?

Question

When reading in a KeyStore using a FileInputStream as follows, does one need to explicitly close the input-steam to stop system resources being wasted ?

File         


        

Answer 1

Yes, try this test

    FileInputStream fin = new FileInputStream("keystore.jks") {
        public void close() throws java.io.IOException {
            System.out.println("close");
        }
    };
    KeyStore keystore = KeyStore.getInstance("JKS");
    keystore.load(fin, "changeit".toCharArray());

and you will see that close() is not called