java - 如何打印袋子数据类型？

Question

Bag<String> wordFrequencies = getWordFrequencies(text);

我如何查看这个词频包包含的内容.. 我用过org.apache.commons.collections15.Bagorg.apache.commons.collections15.bag.HashBag 包

Answer 1

public static String bagToString(Bag<?> bag) {
    StringBuilder sb = new StringBuilder();
    for (Object o : bag.uniqueSet() {

        sb.append(o);
        sb.append(":");
        int nItems = bag.getCount(o);
        sb.append(nItems);
        sb.append(" ");
    }
    return sb.toString();
}