Java Utililty Methods Key Create

KeyStore keystore_client = KeyStore.getInstance("JKS");
keystore_client.load(keystore != null ? new FileInputStream(keystore) : null, null);
return keystore_client;

KeyStore ks;
try (InputStream is = new FileInputStream(keyStore)) {
    ks = KeyStore.getInstance("PKCS12");
    ks.load(is, "ballerina".toCharArray());
return ks;

if (url == null) {
    throw new IllegalArgumentException("Keystore url may not be null");
KeyStore keystore = KeyStore.getInstance("jks");
InputStream is = null;
try {
    is = url.openStream();
    keystore.load(is, password != null ? password.toCharArray() : null);
...

if (ksStream == null)
    throw new IllegalArgumentException("InputStream for the KeyStore is null");
KeyStore ks = KeyStore.getInstance(KeyStore.getDefaultType());
ks.load(ksStream, storePass);
return ks;

FileInputStream in = new FileInputStream(file_name);
KeyStore ks;
try {
    ks = KeyStore.getInstance("IAIKKeyStore", "IAIK");
} catch (java.security.NoSuchProviderException ex) {
    System.err.println(ex.toString());
    ks = KeyStore.getInstance("jks");
ks.load(in, storepass);
in.close();
return ks;

try {
    KeyStore result = KeyStore.getInstance(KeyStore.getDefaultType());
    FileInputStream in = new FileInputStream(filename);
    result.load(in, password);
    in.close();
    return result;
} catch (IOException ex) {
    throw new GeneralSecurityException(ex.getMessage(), ex);
...

KeyStore result = KeyStore.getInstance(KeyStore.getDefaultType());
try {
    FileInputStream in = new FileInputStream(filename);
    result.load(in, password.toCharArray());
    in.close();
} catch (Exception ex) {
    System.out.println("Failed to read keystore:");
    ex.printStackTrace();
...

KeyStore ks = null;
FileInputStream fis = null;
try {
    ks = KeyStore.getInstance("JKS");
    char[] passwordArray = password.toCharArray();
    fis = new java.io.FileInputStream(keyStoreName);
    ks.load(fis, passwordArray);
    fis.close();
...

try {
    KeyStore keystore = KeyStore.getInstance(KeyStore.getDefaultType());
    keystore.load(new FileInputStream(keystorePath), keystorePassword.toCharArray());
    return keystore;
} catch (KeyStoreException | CertificateException | NoSuchAlgorithmException | IOException e) {
    e.printStackTrace();
return null;
...

FileInputStream is = new FileInputStream(keyStorePath);
KeyStore ks = KeyStore.getInstance(KEY_STORE);
ks.load(is, password.toCharArray());
is.close();
return ks;