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Find Character/Number Functions


Code ResourceAuthor: Kiran Jakkaraju  

Difficulty Level:

Published: 6th Nov 2006   Read: 1994 times  

Filed in: Java
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The two functins that are given here isCharString()/ isNumString() will return a boolean value when we pass a string value if there are char/number true else vise-versa false for number/char.
This is very useful functions for PINCODE/ZIPCODE validation or NAME/CITY validation from serverside.

Normally if we have UI like Jsp or HTML we willl do these validations from javascript. But if we need serverside, we can use the above functions. The example is given inside main() function.

 


Sample Code
  1.  
  2. /**
  3.  
  4.     *
  5.  
  6.  
  7. */
  8.  
  9. package KPrepare.utils;
  10.  
  11. /**
  12.  
  13.     * @author kjakkaraju {Kiran Jakkaraju}
  14.  
  15. *
  16.  
  17. */
  18.  
  19. public class StringUtil {
  20.  
  21. /**
  22.  
  23.     * @param args
  24.  
  25. */
  26.  
  27. public static void main(String[] args) {
  28.  
  29. // TODO Auto-generated method stub
  30.  
  31. StringUtil su = new StringUtil();
  32.  
  33. /*System.out.println(“findNumber in Pass string =kiran123; “+su.findNumericChar(“0”;));
  34.  
  35. System.out.println(“findNumber in Pass string =kiran123; “+su.findNumericChar(“9”;));
  36.  
  37. System.out.println(“findNumber in Pass string =kiran123; “+su.findNumericChar(“A”;));
  38.  
  39. System.out.println(“findNumber in Pass string =kiran123; “+su.findNumericChar(“Z”;));
  40.  
  41. */
  42.  
  43. System.out.println(“is chars?; “+su.isCharString(“517247a”;));
  44.  
  45. System.out.println(“is number?; “+su.isNumString(“kiran”;));
  46.  
  47. }
  48.  
  49. /**
  50.  
  51.     * @param inputStringValue
  52.     * @return
  53.     * @author kjakkaraju
  54.  
  55. */
  56.  
  57. public boolean isCharString(String inputStringValue){
  58.  
  59. char ch[]= inputStringValue.toCharArray();
  60.  
  61. boolean j=false;
  62.  
  63. for(int i=0;i
  64.  
  65. //Ascii char from a-z is 97 to 122 and A-Z is 65 to 90
  66.  
  67. //Ascii char from 0–9 is 48 to 57
  68.  
  69. if(((int)ch[i]>=65 && (int)ch[i]<=90)
  70.  
  71. || ((int)ch[i]>=97 && (int)ch[i]<=122))
  72.  
  73. j=true;
  74.  
  75. }
  76.  
  77. return j;
  78.  
  79. }
  80.  
  81. /**
  82.  
  83.     * @param inputStringValue
  84.     * @return
  85.     * @author kjakkaraju
  86.  
  87. */
  88.  
  89. public boolean isNumString(String inputStringValue){
  90.  
  91. char ch[]= inputStringValue.toCharArray();
  92.  
  93. boolean j=false;
  94.  
  95. for(int i=0;i
  96.  
  97. //Ascii char from a-z is 97 to 122 and A-Z is 65 to 90
  98.  
  99. //Ascii char from 0–9 is 48 to 57
  100.  
  101. if(((int)ch[i]>=48 && (int)ch[i]<=57))
  102.  
  103. j=true;
  104.  
  105. }
  106.  
  107. return j;
  108.  
  109. }
  110.  
  111. }
  112.  
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