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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. 		System.out.println(">"+rowofStars(2,5)+"<");
  13. 		System.out.println(">"+rowofStars(3,5)+"<");
  14. 		System.out.println(">"+rowofStars(4,5)+"<");
  15. 		System.out.println(">"+rowofStars(5,6)+"<");
  16. 		System.out.println(">"+rowofStars(2,6)+"<");
  17. 		System.out.println(">"+rowofStars(6,5)+"<");
  18.  
  19. 	}
  20.  
  21. 	static String rowofStars(int nbStars, int size){
  22. 		if(nbStars>size) throw new IllegalArgumentException("nbStars>size");
  23. 		StringBuilder sb = new StringBuilder();
  24. 		int nbStarsOneSide = nbStars/2;
  25. 		int nbOneSide = size/2;
  26. 		for(int i=0; i<(nbOneSide-nbStarsOneSide); i++){
  27. 			sb.append(" ");
  28. 		}
  29. 		for(int i=0; i<nbStarsOneSide; i++){
  30. 			sb.append("*");
  31. 		}
  32. 		String secondSide = new StringBuilder(sb.toString()).reverse().toString();
  33. 		sb.append(nbStars%2 != 0 ? "*" : " ");
  34. 		sb.append(secondSide);
  35. 		return sb.toString();
  36. 	}
  37. }
Runtime error #stdin #stdout #stderr 0.06s 27856KB
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stdin
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Standard input is empty
stdout
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> * * <
> *** <
>** **<
> ***** <
>  * *  <
stderr
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Exception in thread "main" java.lang.IllegalArgumentException: nbStars>size
	at Ideone.rowofStars(Main.java:22)
	at Ideone.main(Main.java:17)
https://ideone.com/tOTQ0T
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
public

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