Can one object access a private variable?

最新推荐文章于 2024-12-01 23:53:54 发布

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最新推荐文章于 2024-12-01 23:53:54 发布

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分类专栏：关于SCJP的学习文章标签： object access recursion class string

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本文通过一个Java示例程序展示了如何在一个类的对象中访问另一个同类对象的私有变量。示例中定义了一个名为Test1的类，该类包含一个私有整型变量i，并在构造函数中通过创建新的同类对象并直接访问其私有变量来展示这一特性。

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Q. Can one object access a private variable of another object of the same class?
A:
Yes! One object can access a private variable of another object of the same class. The private field can be accessed from static method of the class through an instance of the same class too.
Here is an example:
//****************
public class Test1 {
private int i;
Test1(int ii) {
i = ii;
System.out.println("Self: " + i);
// to avoid infinite recursion
if (i != 3) {
Test1 other = new Test1(3);
other.i++;
System.out.println("Other: " + other.i);
}
}
public static void main(String[] args) {
Test1 t = new Test1(5);
// The private field can be accessed from
// static method of the same class
// through an instance of the same class
System.out.println(t.i);
}
}
//****************