嵌套LinkedList的.size（）

Question

I have a nested LinkedList that I need to run through a loop and need the .size() of the nested list. How can I access this nested list? The outer list only has 1 element and that element has the number of elements I need to run the for loop.

 LinkedList<LinkedList<Plan>> eligiblePlansList = new LinkedList<>(); LinkedList<String> planNames = new LinkedList<>(); String [] arr; /** * Creates new form ComparePlansGUI */ public ComparePlansGUI() { initComponents(); } public ComparePlansGUI(HealthCare hc, Customer c){ this.hc = hc; eligiblePlansList.add(p.eligiblePlans(c, hc.getPlans())); for (int i = 0; i < eligiblePlansList.size(); i++){ planNames.add(i, eligiblePlansList.get(i).get(i).planName); } arr = planNames.toArray(new String[planNames.size()]); planNames.clear(); initComponents(); } 

Answer 1

尝试这个：

eligiblePlansList.get(0).size()

Answer 2

eligiblePlansList.get(0).size()

Answer 3

You need to add additional loop:

for (int i = 0; i < eligiblePlansList.size(); i++) {
    LinkedList<Plan> planList = eligiblePlansList.get(i); // current list

    for (int j = 0; i < planList.size(); i++) {
        Plan plan = planList.get(j); // current plan
        planNames.add(i, plan.planName); 
    }
}

Answer 4

for(Linkedlist item:plans)

for(plan p:item)