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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.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. public static void main (String[] args) throws java.lang.Exception
  11. {
  12. Double boxedPrimitive = 4.0;
  13. System.out.println("Boxed into::"+boxedPrimitive.getClass().getSimpleName()+" , Value::"+boxedPrimitive);
  14.  
  15. double unboxedPrimitive = boxedPrimitive;
  16. System.out.println("Un-Boxed into::"+double.class+" , Value::"+unboxedPrimitive);
  17.  
  18. }
  19.  
  20.  
  21. }
Success #stdin #stdout 0.09s 320576KB
stdin
Standard input is empty
stdout
Boxed into::Double , Value::4.0
Un-Boxed into::double , Value::4.0