FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
Class.newInstance() give InstantiationException where it should create object for inner class.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1. Create Outer class
2. Inner class inside Outer.
3. Create test() method, in this method as below :
public class Outer {

public void test() {

ObjCreator it = new ObjCreator();
Inner obj = it.start(Inner.class);
System.out.println(obj);
}

public class Inner {
public Inner() {
System.out.println("Initializing");
}
}

}
3. Create ObjCreator class as below:
public class ObjCreator {

public <T> T start(Class<T> clazz) {
T newObj = null;
try {
newObj = clazz.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
e.printStackTrace();
}

return newObj;
}

}

4. Create Main Class as below :

public class Main {

/**
* @param args
*/
public static void main(String[] args) {
Outer outer = new Outer();
outer.test();

}

}

5. Run the main program.


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Should create object of class Inner when Outer class is already created
ACTUAL -
null
java.lang.InstantiationException: model.Outer$Inner
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at test.ObjCreator.start(ObjCreator.java:8)
at model.Outer.test(Outer.java:10)
at main.Main.main(Main.java:12)


ERROR MESSAGES/STACK TRACES THAT OCCUR :
java.lang.InstantiationException: model.Outer$Inner
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at test.ObjCreator.start(ObjCreator.java:8)
at model.Outer.test(Outer.java:10)
at main.Main.main(Main.java:12)


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package model;

import test.ObjCreator;

public class Outer {

public void test() {

ObjCreator it = new ObjCreator();
Inner obj = it.start(Inner.class);
System.out.println(obj);
}

public class Inner {
public Inner() {
System.out.println("Initializing");
}
}

}




package test;

public class ObjCreator {

public <T> T start(Class<T> clazz) {
T newObj = null;
try {
newObj = clazz.newInstance();
} catch (InstantiationException | IllegalAccessException e) {
e.printStackTrace();
}

return newObj;
}

}





package main;

import model.Outer;

public class Main {

/**
* @param args
*/
public static void main(String[] args) {
Outer outer = new Outer();
outer.test();

}

}

---------- END SOURCE ----------

SUPPORT :
YES