Just practicing

StringParser.java

@@ -1,4 +1,5 @@
-
+import java.lang.*;
+import java.util.*;
 /**
  * An introduction to Strings and String methods.
  *
@@ -15,7 +16,7 @@ public class StringParser
      */
     public static String upperCaseString(String s)
     {
-        return null;
+        return s.toUpperCase();
     }
 
     /**
@@ -26,7 +27,7 @@ public class StringParser
      * @return String
      */
     public static String lowerCaseString(String s) {
-        return null;
+        return s.toLowerCase();
     }
 
     /**
@@ -37,7 +38,7 @@ public class StringParser
      * @return String
      */
     public static Character getFirstCharacter(String s) {
-        return null;
+        return s.charAt(0);
     }
 
     /**
@@ -49,7 +50,7 @@ public class StringParser
      * @return String
      */
     public static Character getNthCharacter(String s, Integer n) {
-        return null;
+        return s.charAt(n);
     }
 
     /**
@@ -60,7 +61,7 @@ public class StringParser
      * @return String
      */
     public static String upperCaseFirstCharacter(String s) {
-        return null;
+        return s.substring(0,1).toUpperCase() + s.substring(1);
     }
 
     /**
@@ -72,7 +73,8 @@ public class StringParser
      * @return String
      */
     public static String camelCaseString(String s) {
-        return null;
+        int x = s.indexOf(' ');
+        return s.substring(0,1).toUpperCase() + s.substring(1,x).toLowerCase() + s.substring(x+1,x+2).toUpperCase() + s.substring(x+2).toLowerCase();
     }
 
     /**
@@ -84,7 +86,8 @@ public class StringParser
      * @return String
      */
     public static String snakeCaseString(String s) {
-        return null;
+        int x = s.indexOf(' ');
+        return s.substring(0,x).toLowerCase() + "_" + s.substring(x+1).toLowerCase();
     }
 
     /**
@@ -95,7 +98,7 @@ public class StringParser
      * @return String
      */
     public static Integer getLength(String s) {
-        return null;
+        return s.length();
     }
 
     /**
@@ -109,7 +112,8 @@ public class StringParser
      * @return String
      */
     public static Boolean isEqual(String s1, String s2) {
-        return null;
+        Boolean z = s1.equals(s2) ? true : false;
+        return z;
     }
 
     /**
@@ -123,6 +127,7 @@ public class StringParser
      * @return String
      */
     public static Boolean isEqualIgnoreCase(String s1, String s2) {
-        return null;
+        Boolean z = s1.equalsIgnoreCase(s2) ? true : false;
+        return z;
     }
 }

package.bluej

@@ -1,3 +1,39 @@
 #BlueJ package file
-#Wed Oct 17 09:06:47 EDT 2018
+editor.fx.0.height=722
+editor.fx.0.width=1025
+editor.fx.0.x=392
+editor.fx.0.y=35
+objectbench.height=101
+objectbench.width=776
+package.divider.horizontal=0.6
+package.divider.vertical=0.8007380073800738
+package.editor.height=427
+package.editor.width=674
+package.editor.x=0
+package.editor.y=23
+package.frame.height=600
+package.frame.width=800
+package.numDependencies=0
+package.numTargets=2
+package.showExtends=true
+package.showUses=true
 project.charset=UTF-8
+readme.height=58
+readme.name=@README
+readme.width=47
+readme.x=10
+readme.y=10
+target1.height=50
+target1.name=StringParser
+target1.showInterface=false
+target1.type=ClassTarget
+target1.width=100
+target1.x=10
+target1.y=80
+target2.height=50
+target2.name=StringParserTest
+target2.showInterface=false
+target2.type=UnitTestTargetJunit4
+target2.width=130
+target2.x=120
+target2.y=90