关于搜索条件的正则表达式（来自之前和以后）

Question

我的下拉值为＆＃34;来自＆＃34;和＃34;之前＆＃34;用于搜索我输入的文本框中的文本。 例如，在文本框中，我有sam beach center，aloe beach和center of pearl等值。在Java中，我已经实现了

public static List<Reference> getComesAfterList(List<Reference> items, String searchField){
        ArrayList<Reference> matchingList = new ArrayList<Reference>(items.size());
            Iterator<Reference> refDataItems = items.iterator();
        String searchFieldLower = searchField.trim().toLowerCase();
        while (refDataItems.hasNext()) {
                 reference = refDataItems.next();
             try {
                     description = (String)reference.getValue(Reference.USERDESCRIPTION);
             }
        catch (Exception exc) {                          
                    throw new RuntimeException(exec);
             }
        if (description.matches("searchFieldLower(?=description)"))     
        //comes after scenerio->A(?=B)Find expression A where expression B follows 
        {
                    matchingList.add(reference);
                }
    }
}

//comes before case

public static List<Reference> getComesBeforeList(List<Reference> items, String searchField){
        ArrayList<Reference> matchingList = new ArrayList<Reference>(items.size());
            Iterator<Reference> refDataItems = items.iterator();
        String searchFieldLower = searchField.trim().toLowerCase();
        while (refDataItems.hasNext()) {
                 reference = refDataItems.next();
             try {
                     description = (String)reference.getValue(Reference.USERDESCRIPTION);
             }
        catch (Exception exc) {                          
                    throw new RuntimeException(exec);
             }
        if (description.matches("(?<=searchFieldLower)description"))    
        //comes before scenerio->(?<=B)A Find expression A where expression B precedes
        {
                    matchingList.add(reference);
                }
    }
}

如何搜索此类文字条件？除了正则表达式之外还有其他方法吗？帮我解决这个问题。