Practice with string and loop

StringParser.java 4.0KB

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  1. /**
  2. * An introduction to Strings and String methods.
  3. *
  4. * @author Wilhem Alcivar
  5. */
  6. public class StringParser
  7. {
  8. /**
  9. * Takes a String and returns that String with all characters uppercased.
  10. * E.G. cat would become CAT. dOnUt would become DONUT.
  11. *
  12. * @param s
  13. * @return String
  14. */
  15. public static String upperCaseString(String s)
  16. {
  17. return s.toUpperCase();
  18. }
  19. /**
  20. * Takes a String and returns that String with all characters lowercased.
  21. * E.G. MOUSE would become mouse. dOnUt would become donut.
  22. *
  23. * @param s
  24. * @return String
  25. */
  26. public static String lowerCaseString(String s) {
  27. return s.toLowerCase();
  28. }
  29. /**
  30. * Takes a String and returns the first character of that string.
  31. * E.G. cat would return c. Embark would return E.
  32. *
  33. * @param s
  34. * @return String
  35. */
  36. public static Character getFirstCharacter(String s) {
  37. return s.charAt(0);
  38. }
  39. /**
  40. * Takes a String and returns the character at index n of that string.
  41. * E.G. cat, 2 would return t. Embark, 4 would return r.
  42. *
  43. * @param s
  44. * @param n
  45. * @return String
  46. */
  47. public static Character getNthCharacter(String s, Integer n) {
  48. return s.charAt(n);
  49. }
  50. /**
  51. * Takes a String and returns that string with the first character uppercased.
  52. * E.G. cat would return Cat. cofFee would return CofFee.
  53. *
  54. * @param s
  55. * @return String
  56. */
  57. public static String upperCaseFirstCharacter(String s) {
  58. String t = s.substring(0, 1).toUpperCase() + s.substring(1);
  59. return t;
  60. }
  61. /**
  62. * Takes a String and returns that string with the first character of each word in it uppercased
  63. * and then joined.
  64. * E.G. dog whistle would return DogWhistle. adjuNCT pRoFessOR would return AdjuctProfessor.
  65. *
  66. * @param s
  67. * @return String
  68. */
  69. public static String camelCaseString(String s) {
  70. //MAKE ALL LOWER CASE
  71. String lowerCase = s.toLowerCase();
  72. //SPLIT BETWEEN FIRST WORD AND SECOND WORD
  73. String first = lowerCase.substring(0,(lowerCase.indexOf(" ")));
  74. String second = lowerCase.substring((lowerCase.indexOf(" ") + 1),lowerCase.length());
  75. //CAPITALIZE BOTH WORDS INDEX OF [0]
  76. String firstCap = first.substring(0, 1).toUpperCase() + first.substring(1,first.length());
  77. String secondCap = second.substring(0, 1).toUpperCase() + second.substring(1,second.length());
  78. //COMBINED BOTH WORDS
  79. return firstCap + secondCap;
  80. }
  81. /**
  82. * Takes a String and returns that string with each character lowercased
  83. * and then joined with an underscore
  84. * E.G. dog whistle would return dog_whistle. adjuNCT pRoFessOR would return adjuct_professor.
  85. *
  86. * @param s
  87. * @return String
  88. */
  89. public static String snakeCaseString(String s) {
  90. String underscore = s.toLowerCase().replaceAll(" ","_");
  91. return underscore;
  92. }
  93. /**
  94. * Takes a String and returns the length of that string
  95. * E.G. cat would return 3. extra would return 5.
  96. *
  97. * @param s
  98. * @return String
  99. */
  100. public static Integer getLength(String s) {
  101. return s.length();
  102. }
  103. /**
  104. * Takes in two strings and returns true if they are equal
  105. * E.G. example and shelf would return false.
  106. * cat and CaT would return false.
  107. * Dog and Dog would return true
  108. *
  109. * @param s1
  110. * @param s2
  111. * @return String
  112. */
  113. public static Boolean isEqual(String s1, String s2) {
  114. return s1.equals(s2);
  115. }
  116. /**
  117. * Takes in two strings and returns true if they are equal
  118. * E.G. example and shelf would return false.
  119. * cat and CaT would return true.
  120. * Dog and Dog would return true
  121. *
  122. * @param s1
  123. * @param s2
  124. * @return String
  125. */
  126. public static Boolean isEqualIgnoreCase(String s1, String s2) {
  127. return s1.equalsIgnoreCase(s2);
  128. }
  129. }