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  1. import java.lang.*;
  2.  
  3. class Ideone {
  4. 	public static void main (String[] args) throws java.lang.Exception {
  5. 		System.out.println(PegaPrimirosDigitos(12345678, 4));
  6. 		System.out.println(PegaPrimirosDigitos(-12345678, 4));
  7. 		System.out.println(PegaPrimirosDigitos(123, 4));
  8. 		System.out.println(PegaPrimirosDigitos(-12, 4));
  9. 		System.out.println(PegaPrimirosDigitos(0, 0));
  10. 	}
  11. 	public static int PegaPrimirosDigitos(int valor, int digitos) {
  12. 		digitos = Math.max(1, digitos);
  13. 		int positivo = Math.abs(valor);
  14. 	    String texto = String.valueOf(positivo);
  15.         if(digitos > texto.length()) {
  16.             return valor;
  17.         }
  18. 		return Integer.parseInt(texto.substring(0, digitos)) * Integer.signum(valor);
  19. 	}
  20. }
Success #stdin #stdout 0.06s 380224KB
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stdin
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Standard input is empty
stdout
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1234
-1234
123
-12
0
https://ideone.com/uB3nrA
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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