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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6. import java.lang.reflect.Constructor;
  7. import java.lang.reflect.InvocationTargetException;
  8.  
  9. class Strings{
  10. 	private String s;
  11. 	private Strings(){
  12. 		s=null;
  13. 	}
  14. 	private Strings(String s1){
  15. 		s=s1;
  16. 	}
  17. 	public String toString() {
  18.         return s;
  19.     }
  20. }
  21.  
  22. /* Name of the class has to be "Main" only if the class is public. */
  23. class Ideone
  24. {
  25. 	public static void main (String[] args) throws java.lang.Exception
  26. 	{
  27.  
  28. 		try {
  29.       Constructor c = Strings.class.getDeclaredConstructor();
  30.      // c.setAccessible(true); // solution
  31.       c.newInstance("abc");
  32.       System.out.println(c.newInstance("abc"));
  33.       // production code should handle these exceptions more gracefully
  34.     } catch (InvocationTargetException x) {
  35.       x.printStackTrace();
  36.     } catch (NoSuchMethodException x) {
  37.       x.printStackTrace();
  38.     } catch (InstantiationException x) {
  39.       x.printStackTrace();
  40.     } catch (IllegalAccessException x) {
  41.       x.printStackTrace();
  42.     }
  43.  
  44.  
  45. 	}
  46. }
Success #stdin #stdout #stderr 0.04s 4386816KB
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Standard input is empty
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Standard output is empty
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java.lang.IllegalAccessException: Class Ideone can not access a member of class Strings with modifiers "private"
	at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102)
	at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296)
	at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:413)
	at Ideone.main(Main.java:31)
https://ideone.com/ea7XUi
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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