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  1. import java.util.*;
  2.  
  3. interface Foo { void foo(); }
  4. interface Bar { void bar(); }
  5.  
  6. class Humpty implements Foo, Bar {
  7.   public void foo() { System.out.println("Humpty.foo()"); }
  8.   public void bar() { System.out.println("Humpty.bar()"); }
  9. }
  10.  
  11. class Dumpty implements Foo, Bar {
  12.   public void foo() { System.out.println("Dumpty.foo()"); }
  13.   public void bar() { System.out.println("Dumpty.bar()"); }
  14. }
  15.  
  16. public class Main {
  17.   @SuppressWarnings("unchecked")
  18.   public static <FooBar extends Foo & Bar> void main(String[] args) {
  19.     // I actually have no idea what the syntax should be.
  20.     Random random = new Random();
  21.     // Fix: I previously used <? extends Foo, Bar>, thanks Jon Skeet and vijucat
  22.     FooBar foobar;
  23.     if (random.nextBoolean())
  24.       foobar = (FooBar) new Humpty();
  25.     else
  26.       foobar = (FooBar) new Dumpty();
  27.     foobar.foo();
  28.     foobar.bar();
  29.   }
  30. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
spoj: The program compiled successfully, but main class was not found.
      Main class should contain method: public static void main (String[] args).
stdout
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Standard output is empty
https://ideone.com/o9wmFJ
language:
Java (12.0.1)
created:
10 years ago
visibility:
public

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