java – relleno derecho de una cadena con espacios y ceros

En este tutorial veremos cómo rellenar a la derecha una cadena con espacios y ceros:

1) Almohadilla derecha con espacios

public class PadRightExample1 {
  public static void main(String[] argv) {
    System.out.println("https://beginnersbook.com/2014/07/java-right-padding-a-string-with-spaces-and-zeros/#" + rightPadding("mystring", 10) + "@");
    System.out.println("https://beginnersbook.com/2014/07/java-right-padding-a-string-with-spaces-and-zeros/#" + rightPadding("mystring", 15) + "@");
    System.out.println("https://beginnersbook.com/2014/07/java-right-padding-a-string-with-spaces-and-zeros/#" + rightPadding("mystring", 20) + "@"); 
  }

  public static String rightPadding(String str, int num) {
    return String.format("%1$-" + num + "s", str);
  }
}

Producción:

#mystring  @
#mystring       @
#mystring            @

2) Pad derecho con ceros

public class PadRightExample2 {
  public static void main(String[] argv) {
    System.out.println("https://beginnersbook.com/2014/07/java-right-padding-a-string-with-spaces-and-zeros/#" + rightPadZeros("mystring", 10) + "@");
    System.out.println("https://beginnersbook.com/2014/07/java-right-padding-a-string-with-spaces-and-zeros/#" + rightPadZeros("mystring", 15) + "@");
    System.out.println("https://beginnersbook.com/2014/07/java-right-padding-a-string-with-spaces-and-zeros/#" + rightPadZeros("mystring", 20) + "@");
  }

  public static String rightPadZeros(String str, int num) {
    return String.format("%1$-" + num + "s", str).replace(' ', '0');
  }
}

Producción:

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