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methodscallprivateinvoke
user2052015
user2052015

Reputation: 303

How to call private method by other methods?

I am confused of calling a private method by another method(public) belonging to the same class.Once I have been told I gotta create an object of that class and then call the private method via this object but in one of my questions in this forum I have been told that I dont need to use object.

public class Train() {

    private void method1{......method definition..... }

    public void method2{......how to invoke method1??}

}

Can I simply call the first method inside the second method by using method1(); or should I invoke it by creating an object of the class and Object_of_Train.method1();.

Which one should I use?

Upvotes: 0

Views: 18517

Answers (3)

B_Ali
B_Ali

Reputation: 54

You can access the private methods of a class using java reflection package.

**Step1 − Instantiate the Method class of the java.lang.reflect package by passing the method name of the method which is declared private.

Step2 − Set the method accessible by passing value true to the setAccessible() method.

Step3 − Finally, invoke the method using the invoke() method.**

Example

import java.lang.reflect.Method;

public class DemoTest {
   private void sampleMethod() {
      System.out.println("hello");
   }
}

public class SampleTest {
   public static void main(String args[]) throws Exception {
      Class c = Class.forName("DemoTest");
      Object obj = c.newInstance();
      Method method = c.getDeclaredMethod("sampleMethod", null);
      method.setAccessible(true);
      method.invoke(obj, null);
   }
}

Source : Tutorialpoint

Upvotes: -1

scott
scott

Reputation: 974

Use this.method1(); to call from method2() or any other non-static method in the class.

Upvotes: 0

mika
mika

Reputation: 1451

Within the class you should be able to call method1();

Outside the class you will need to call it from an instance of that class and will have access to public methods only

Upvotes: 2

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