Java - 如何访问另一个类的ArrayList？

Question

你好,我是Java的初学者,这是我的问题:我的第一堂课有以下变量:

import java.util.ArrayList;

public class numbers {
    private int number1 = 50;
    private int number2 = 100;
}

我也有这门课:

import java.util.ArrayList;

public class test {
    private numbers number;
}

我的问题是:我想将number1和number2变量存储到ArrayList中,然后从类test中访问这个ArrayList.我怎样才能做到这一点？

Answer 1

import java.util.ArrayList;
public class numbers {
   private int number1 = 50;
   private int number2 = 100;
   private List<Integer> list;

   public numbers() {
       list = new ArrayList<Integer>();
       list.add(number1);
       list.add(number2);
   }

   public List<Integer> getList() {
       return list;
   }
}

和测试类:

import java.util.ArrayList;
public class test {
   private numbers number;

   //example
   public test() {
     number = new numbers();
     List<Integer> list = number.getList();
     //hurray !
   }
}