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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.Modifier;
  8.  
  9.  
  10. abstract class Foo {
  11. 	protected int x;
  12.  
  13. 	protected Foo(int x) {
  14. 		this.x = x;
  15. 	}
  16.  
  17. 	public abstract void bar();
  18. }
  19. /* Name of the class has to be "Main" only if the class is public. */
  20. class Ideone
  21. {
  22. 	public static void main (String[] args) throws java.lang.Exception
  23. 	{
  24. 		Foo foo = new Foo(123) { // <<== This works because of "compiler magic"
  25. 			public void bar() {
  26. 				System.out.println("hi " + x);
  27. 			}
  28. 		};
  29. 		foo.bar();
  30.  
  31. 		Class<?> clazz = foo.getClass();
  32. 		for (Constructor<?> c : clazz.getDeclaredConstructors()){
  33. 			System.out.println(c);
  34. 			System.out.println("public? "+Modifier.isPublic(c.getModifiers()));
  35. 			System.out.println("protected? "+Modifier.isProtected(c.getModifiers()));
  36. 			System.out.println("private? "+Modifier.isPrivate(c.getModifiers()));
  37. //			System.out.println("default? "+Modifier.isProtected(c.getModifiers()));
  38. 		}
  39. 	}
  40. }
Success #stdin #stdout 0.06s 380160KB
comments (?)
stdin 
Standard input is empty
stdout 
hi 123
Ideone$1(int)
public? false
protected? false
private? false
https://ideone.com/tiLaMg
language:
Java (12.0.1)
created:
10 years ago
visibility:
secret

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