Java tutorial
//package com.java2s; public class Main { /** * for input */ private static String[] FIXED_FIELD = { "transaction_name", "user_id", "log_id", "function_name", "system_timestamp", "function_id" }; private static boolean isCommonInput(Object key) { if (key == null) return false; for (int i = 0; i < FIXED_FIELD.length; i++) { if (key.equals(FIXED_FIELD[i])) { return true; } } return false; } }