java - 循环清空arraylist

每次attributeList将值“添加”到largeAttributeList时，如何清空？我已经尝试过.clear（），但是largeAttributeList会丢失所有值。

ArrayList<String> attributeList = new ArrayList<String>();
ArrayList<ArrayList<String>> largeAttributeList = new
ArrayList<ArrayList<String>>();

for (int i = 0; i < attribute.getLength(); i++) {
        String current = attribute.item(i).getTextContent();
        if(current.equals("Identifier")){
            largeAttributeList.add(attributeList);
        }
        else{
            attributeList.add(current);
        }
    }

最佳答案

您可以在循环中初始化数组：

....
ArrayList<String> attributeList;
for (int i = 0; i < attribute.getLength(); i++) {
    String current = attribute.item(i).getTextContent();
    if (current.equals("Identifier")) {
        largeAttributeList.add(attributeList);
        attributeList = new ArrayList<>();//<<<-------------
    } else {
        attributeList.add(current);
    }

}

关于java - 循环清空arraylist，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44282599/