Created
October 12, 2009 21:16
-
-
Save simaofreitas/208757 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/** | |
* Classe que abstrai a utilização da classe Scanner, escondendo todos os | |
* problemas relacionados com excepções, e que oferece métodos simples e | |
* robustos para a leitura de valores de tipos simples. | |
* | |
* @author F. Mário Martins | |
* @version 1.0 (6/2006) | |
*/ | |
import static java.lang.System.out; | |
import static java.lang.System.in; | |
import java.util.Scanner; | |
import java.util.InputMismatchException; | |
public class Input { | |
/** | |
* Métodos de Classe Teste | |
*/ | |
public static String lerString() { | |
Scanner input = new Scanner(in); | |
boolean ok = false; | |
String txt = ""; | |
while(!ok) { | |
try { | |
txt = input.nextLine(); | |
ok = true; | |
} | |
catch(InputMismatchException e) | |
{ out.println("Texto Inválido"); | |
out.print("Novo valor: "); | |
input.nextLine(); | |
} | |
} | |
input.close(); | |
return txt; | |
} | |
public static int lerInt() { | |
Scanner input = new Scanner(in); | |
boolean ok = false; | |
int i = 0; | |
while(!ok) { | |
try { | |
i = input.nextInt(); | |
ok = true; | |
} | |
catch(InputMismatchException e) | |
{ out.println("Inteiro Inválido"); | |
out.print("Novo valor: "); | |
input.nextLine(); | |
} | |
} | |
input.close(); | |
return i; | |
} | |
public static double lerDouble() { | |
Scanner input = new Scanner(in); | |
boolean ok = false; | |
double d = 0.0; | |
while(!ok) { | |
try { | |
d = input.nextDouble(); | |
ok = true; | |
} | |
catch(InputMismatchException e) | |
{ out.println("Valor real Inválido"); | |
out.print("Novo valor: "); | |
input.nextLine(); | |
} | |
} | |
input.close(); | |
return d; | |
} | |
public static float lerFloat() { | |
Scanner input = new Scanner(in); | |
boolean ok = false; | |
float f = 0.0f; | |
while(!ok) { | |
try { | |
f = input.nextFloat(); | |
ok = true; | |
} | |
catch(InputMismatchException e) | |
{ out.println("Valor real Inválido"); | |
out.print("Novo valor: "); | |
input.nextLine(); | |
} | |
} | |
input.close(); | |
return f; | |
} | |
public static boolean lerBoolean() { | |
Scanner input = new Scanner(in); | |
boolean ok = false; | |
boolean b = false; | |
while(!ok) { | |
try { | |
b = input.nextBoolean(); | |
ok = true; | |
} | |
catch(InputMismatchException e) | |
{ out.println("Booleano Inválido"); | |
out.print("Novo valor: "); | |
input.nextLine(); | |
} | |
} | |
input.close(); | |
return b; | |
} | |
public static short lerShort() { | |
Scanner input = new Scanner(in); | |
boolean ok = false; | |
short s = 0; | |
while(!ok) { | |
try { | |
s = input.nextShort(); | |
ok = true; | |
} | |
catch(InputMismatchException e) | |
{ out.println("Short Inválido"); | |
out.print("Novo valor: "); | |
input.nextLine(); | |
} | |
} | |
input.close(); | |
return s; | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment