将 char 数组转换为字节数组并再次返回

I'm looking to convert a Java char array to a byte array without creating an intermediate String, as the char array contains a password. I've looked up a couple of methods, but they all seem to fail:

char[] password = "password".toCharArray();

byte[] passwordBytes1 = new byte[password.length*2];
ByteBuffer.wrap(passwordBytes1).asCharBuffer().put(password);

byte[] passwordBytes2 = new byte[password.length*2];
for(int i=0; i<password.length; i++) {
    passwordBytes2[2*i] = (byte) ((password[i]&0xFF00)>>8); 
    passwordBytes2[2*i+1] = (byte) (password[i]&0x00FF); 
}

String passwordAsString = new String(password);
String passwordBytes1AsString = new String(passwordBytes1);
String passwordBytes2AsString = new String(passwordBytes2);

System.out.println(passwordAsString);
System.out.println(passwordBytes1AsString);
System.out.println(passwordBytes2AsString);
assertTrue(passwordAsString.equals(passwordBytes1) || passwordAsString.equals(passwordBytes2));

断言总是失败(而且，关键的是，当代码在生产中使用时，密码被拒绝)，但打印语句打印出密码三次.为什么 passwordBytes1AsString 和 passwordBytes2AsString 与 passwordAsString 不同，但看起来相同?我错过了一个空终止符还是什么?我该怎么做才能使转换和取消转换工作?