vault.keystore values not visibles in java application

I want to use a password in my java app saved in the jboss vault.keystore. I add the value with vault.sh (or vault.bat in windows) and validating my key exists in the vault, and in my app I try to use it with:

KeyStore keyStore = KeyStore.getInstance("JCEKS");
KeyStore.load(new FileInputStream(JBOSSPATH+"/vault.keystore"),null);

but in the keyStore variable, I only obtain 1 key: vault and I can't get other values.