The private attribute of this class can be used directly? New() in use!!!

The following are known Test Class description , In this category main At the horizontal line of the method , Which of the following statements is true ？（）

public class Test

{

private float f = 1.0f;

int m = 12;

static int n = 1;

public static void main (String args[])

{

Test t = new Test();

————————

}

}

---

t.f = 1;   correct 

this.n = 1;

Test.m = 1;

Test.f = 1;

If in the same class , Just like this problem, construct an instance object to Direct access to private member variables or private methods is possible , The premise is that you must new() Only an object can call these private properties , Never use it alone , Otherwise, it still reports an error ！

however , Even if there are different classes under the same package , for example ：B Class has private properties , you are here A Create another B class , At this point, you can't directly call private properties , You have to pass get()、set() Operate it