Scriptella:使用集合和for each循环

Question

我如何用scriptella编写下面的代码？看起来它认为我正在尝试比较Set和String，它不像最后一个for循环。写逻辑表达式的方法是什么。谢谢。

<connection id="java" driver="scriptella.driver.janino.Driver"/>

<script connection-id="java>

//some code

if(finalOrderCounter &lt; numberOfEntries){
    Set &lt;String> set = new HashSet &lt;String>();
    for(int i = 0; i &lt; fieldNames.length; i++){
        set.add(fieldNames[i]);
    }
    for(int i = 0; i &lt; fieldNamesFromXML.length; i++){
        set.remove(fieldNamesFromXML[i]);
    }
    String exception = "";
    for(String element:set)
        exception += element +"\n";
    throw new IOException("Field(s)\n" + exception + "do(es) not exits in the source database");
}

​

Answer 1

也许你可以试试“经典的”'for‘循环语法？

StringBuffer exception = new StringBuffer();
for (int i = 0; i < set.size(); ++i) {
    String element = (String) set.get(i);
    exception.append(element);
    exception.append("\n");
}
throw new IOException("Field(s)\n" + exception.toString() + "do(es) not exits in the source database");

顺便说一句，你得到了什么错误？