Java 数组列表错误？

Question

// ArrayList
import java.io.*; 
import java.util.*;

public class ArrayList
{
    public static void main (String [] args)
    {
        Integer obj1 = new Integer (97);
        String obj2 = "Lama";
        CD obj3 = new CD("BlahBlah", "Justin Bieber", 25.0, 13);

        ArrayList objects = new ArrayList();

        objects.add(obj1);
        objects.add(obj2);
        objects.add(obj3);
    }
}

我正在尝试使用这三个对象创建一个数组列表，为什么会收到此错误？

ArrayList.java:15: cannot find symbol
symbol  : method add(java.lang.Integer)
location: class ArrayList
objects.add(obj1);
       ^
ArrayList.java:16: cannot find symbol
symbol  : method add(java.lang.String)
location: class ArrayList
objects.add(obj2);
       ^
ArrayList.java:17: cannot find symbol
symbol  : method add(CD)
location: class ArrayList
objects.add(obj3);
       ^
3 errors

Answer 1

因为，您的类名称是ArrayList。更改您的类(class)名称，例如，

 public class ArrayListTest{
     .....
 }

或者，使用完全限定类名java.util.ArrayList

public class ArrayList{


public static void main (String [] args)
{
  ....
  java.util.ArrayList objects = new java.util.ArrayList();
  ...
}