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  1. public class Sample
  2. {
  3.     public static void main(String[] args)
  4.     {
  5.         Demo d = new Demo(20);
  6.         System.out.println(d.num);
  7.     }
  8. } class Demo
  9. {
  10.     final int num;
  11.  
  12.     public Demo(int n)
  13.     {
  14.         num = n;
  15.     }
  16.  
  17. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:1: error: class Sample is public, should be declared in a file named Sample.java
public class Sample
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/xxxXap
language:
Java (HotSpot 12)
created:
9 years ago
visibility:
public

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