如何在课外访问私有数据成员？

Question

I am trying to access the private data member of inner class outside the outer class.

Please help me?

Answer 1

You don't - that's the whole point of it being private.

The inner class can expose the data via a property, of course:

public class Outer {
    public class Inner {
        private final String name;

        public Inner(String name) {
            this.name = name;
        }

        public String getName() {
            return name;
        }
    }
}

public class Other {
    public void foo() {
        Outer outer = new Outer();
        Outer.Inner inner = outer.new Inner("Foo");
        // Can't access inner.name here...
        System.out.println(inner.getName()); // But can call getName
    }
}

... but if the inner class wants to keep it private, then you shouldn't try to access it.

Answer 2

Create public getter setter methods inside the inner class for private variables. Then create an object and call them to access private data. You can't directly access private data.

Answer 3

you cant access a private data. If ýou have other thoughts of accessing it use public getter method returning that private data.

Answer 4

you can access private data member using getter method ex

package pack;

import java.io.ObjectInputStream.GetField;

public class abc {
    private int num = 2;

    public int getNum() {
        return num;
    }

    public void setNum(int num) {
        this.num = num;
    }

}

class otherClass {
    public static void main(String[] args) {
        abc obj = new abc();
        System.out.println(obj.getNum());
    }
}