string methods

StringParser.java

  *
  * @author Wilhem Alcivar
  */
+
 public class StringParser
 {
     /**
      */
     public static String upperCaseString(String s)
     {
-        return null;
+        return s.toUpperCase();
     }
 
     /**
      * @return String
      */
     public static String lowerCaseString(String s) {
-        return null;
+        return s.toLowerCase();
     }
 
     /**
      * @return String
      */
     public static Character getFirstCharacter(String s) {
-        return null;
+        return s.charAt(0);  
     }
 
     /**
      * @return String
      */
     public static Character getNthCharacter(String s, Integer n) {
-        return null;
+        return s.charAt(n);
     }
 
     /**
      * @return String
      */
     public static String upperCaseFirstCharacter(String s) {
-        return null;
+        String str=s.toUpperCase();
+
+        return ""+str.charAt(0)+s.substring(1,s.length());
     }
 
     /**
      * @return String
      */
     public static String camelCaseString(String s) {
-        return null;
+        //String slowerCase = s.toLowerCase ();
+        String [] list = s.split (" ");
+        String str1 = list[0];
+        String str2 = list[1];
+        return (""+str1.toUpperCase().charAt(0)+str1.toLowerCase().substring(1,str1.length())+str2.toUpperCase().charAt(0)+str2.toLowerCase().substring(1,str2.length()));
     }
 
     /**
      * @return String
      */
     public static String snakeCaseString(String s) {
-        return null;
+        String [] list = s.split (" ");
+        String str1 = list[0].toLowerCase();
+        String str2 = list[1].toLowerCase();
+        
+        return str1+"_"+str2;
     }
 
     /**
      * @return String
      */
     public static Integer getLength(String s) {
-        return null;
+        return s.length();
     }
 
     /**
      * @return String
      */
     public static Boolean isEqual(String s1, String s2) {
-        return null;
+
+        return s1.contentEquals(new StringBuffer (s2));
     }
 
     /**
      * @return String
      */
     public static Boolean isEqualIgnoreCase(String s1, String s2) {
-        return null;
+
+        return s1.equalsIgnoreCase(s2);
     }
 }