json injection with Gson

"gson" injection

    class User{
    	public String name;
    	private Boolean havePermissions;
    };
    
    public static void main(String[] args) {
    	String input = "{name:hacker, havePermissions:true}";
    	
    	Gson gson = new Gson();
    	User user = gson.fromJson(JsonSanitizer.sanitize(input), User.class);
    	
    	if (user.name.equals("admin"))
    		user.havePermissions = true;
    	
    	if (b.havePermissions)
    		System.out.println("OMFG");
	}