key store of java security

KeyStoreTest.java

import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;


public class KeyStoreTest {

    public static void main(String[] args) {
        try {
            secretKeyStore();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void secretKeyStore() throws KeyStoreException, NoSuchAlgorithmException,
            CertificateException, IOException {
        char[] password = "123456".toCharArray();
        String fileName = System.getProperty("user.home") + File.separator + ".keystore";
        FileInputStream fis = new FileInputStream(fileName);
        KeyStore ks = KeyStore.getInstance("jceks");
        ks.load(fis, password);
        KeyGenerator kg = KeyGenerator.getInstance("DES");
        SecretKey key = kg.generateKey();

        ks.setKeyEntry("myKeyEntry", key, password, null);

        FileOutputStream fos = new FileOutputStream(fileName);
        ks.store(fos, password);
        System.out.println("store key in " + fileName);
    }

}