java - Manipulate n instance of the same one inner class

Question

I want to make n instance of one class and manipulate its variables. For example I have Class A that contain variables and i have n instance of this class with b as an object and c as variable d as value

    A b_1 = new A()
    A b_2 = new A()
    A b_n = new A()

I want to make a loop that do this:

    for ( int i=1; i<n; i++) {
        b_n.c =d 
    }

Answer 1

你想要一个数组。创建一个大小为 的数组n：

A objects = new A[n];

遍历数组，初始化对对象的每个引用，并设置变量。

for (int i = 0; i < objects.length; ++i) {
    objects[i] = new A();
    objects[i].setC(b);
}

顺便说一句，您应该public为 field 创建一个 getter c，而不是直接访问它。并作场private。

Answer 2

您应该使用数组或 A 的集合。

列表示例：

List<A> myAs = new ArrayList<A>();
myAs.add(new A());
...

for(A a: myAs) {
 a.doSomething()
}