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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.  
  8. class CellHelper<T> {
  9. 	final T[] mValues;
  10. 	final Class<T> cls;
  11. 	public CellHelper(T[] values, Class<T> c) {
  12. 		mValues = values;
  13. 		cls = c;
  14. 	}
  15. 	public T getCell(int index) {
  16. 		if (index < mValues.length ) {
  17.             return mValues[index];              
  18.         }
  19.         throw new IllegalArgumentException("Invalid " + cls.getSimpleName() + " value: " + index);
  20. 	}
  21. }
  22.  
  23. enum SomeEnumClass {
  24.     ONE(1), TWO(2), THREE(3);
  25.     SomeEnumClass(int n){}
  26.     private static  final CellHelper<SomeEnumClass> helper = new CellHelper(SomeEnumClass.values(), SomeEnumClass.class);
  27.     public static SomeEnumClass getCell(int i) {return helper.getCell(i);}
  28. }
  29.  
  30. enum OtherEnumClass {
  31.     Monday(1), Tuesday(2), Wednesday(3), Thrusday(4), Friday(5), Saturday(6), Sunday(7);
  32.     OtherEnumClass(int n){}
  33.     private static  final CellHelper<OtherEnumClass> helper = new CellHelper(OtherEnumClass.values(), OtherEnumClass.class);
  34.     public static OtherEnumClass getCell(int i) {return helper.getCell(i);}
  35.  
  36.  
  37. }
  38.  
  39. /* Name of the class has to be "Main" only if the class is public. */
  40. class Ideone
  41. {
  42. 	public static void main (String[] args) throws java.lang.Exception
  43. 	{
  44. 		System.out.println(SomeEnumClass.getCell(1));
  45. 		System.out.println(OtherEnumClass.getCell(1));
  46. 	}
  47. }
Success #stdin #stdout 0.04s 320576KB
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TWO
Tuesday
https://ideone.com/txAdvK
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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