Question

如果list类型参数在java中具有int []，如何从列表对象中获取值。所以大家请帮忙解决这个问题。我试过自己。但我卡在了某个地方。

public class Stack {

public static int[] Varun = {94, 97, 21, 71, 80};
public static int[] Monti = {95, 90, 11, 80, 81};
public static int[] Shalini = {90, 91, 20, 71, 72};
public static int[] Kuldeep = {78, 77, 18, 90, 92};
public static int[] Arun = {71, 71, 21, 78, 98};
public static String[] performanceParameters = {"Creativity", "Communication", "TechnicalSkills", "PersonalHabits", "TakeInitiative"};
public static int[] attendenceList = {21, 11, 20, 18, 21};

public static ArrayList<int[]> parameters = new ArrayList<int[]>();

public String[] topPerformers(String[] listOfEmployees, List<int[]> parameters) {
    Arrays.sort(listOfEmployees);
    for(String a:listOfEmployees)
   {
        System.out.println(a);
    }
   Integer a[]=(Integer[]) parameters.toArray(new Integer[parameters.size()]);
    Iterator<int[]> it=parameters.iterator();
    for(int[] arr: parameters)
    {
       for(int item:arr)
       {
           System.out.println(item);
       }
   }

    Iterator<int[]> it = parameters.iterator();
    while (it.hasNext()) {
        int[] arr = it.next();
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }
    }
   // System.out.println(parameters.indexOf(this));

    String topPerformers[] = new String[3];
    Map m = new HashMap();
    // m.put(listOfEmployees, parameters);
    // write your code here.

    return topPerformers;
}

public static void main(String[] args) {
    parameters.add(Varun);
    parameters.add(Monti);
    parameters.add(Shalini);
    parameters.add(Kuldeep);
    parameters.add(Arun);
    Stack s = new Stack();
    s.topPerformers(performanceParameters, parameters);
}

请给我从列表对象中获取数组元素的方法。我尝试过，但我做错了什么。只是帮助完成这个。提前谢谢。

Answer 1

只需在迭代器next()中使用it方法获取int[]实例，然后像这样迭代它

while (it.hasNext()) {
  int[] arr = it.next();
  for (int i = 0; i < arr.length; i++) {
    System.out.println(arr[i]);
  }
}

Answer 2

试试这个，

for(int[] arr : parameters){
      for(int item:arr){
           System.out.println(item);
       }
 }

整数数组作为java中列表中的类型参数

2 个答案: