This is from Keystore javadoc:
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 Before a keystore can be accessed, it must be loaded.

    KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());

    // get user password and file input stream
    char[] password = getPassword();
    java.io.FileInputStream fis =
        new java.io.FileInputStream("keyStoreName");
    ks.load(fis, password);
    fis.close();
 

To create an empty keystore using the above load method, pass null as the InputStream argument.

Once the keystore has been loaded, it is possible to read existing entries from the keystore, or to write new entries into the keystore:

    // get my private key
    KeyStore.PrivateKeyEntry pkEntry = (KeyStore.PrivateKeyEntry)
        ks.getEntry("privateKeyAlias", password);
    PrivateKey myPrivateKey = pkEntry.getPrivateKey();

    // save my secret key
    javax.crypto.SecretKey mySecretKey;
    KeyStore.SecretKeyEntry skEntry =
        new KeyStore.SecretKeyEntry(mySecretKey);
    ks.setEntry("secretKeyAlias", skEntry, password);

    // store away the keystore
    java.io.FileOutputStream fos =
        new java.io.FileOutputStream("newKeyStoreName");
    ks.store(fos, password);
    fos.close();
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In the example code, there is a call to setEntry(String, KeyStore.Entry, char[]), which does not exist.