quiz

StringArrayUtils.java

@@ -9,7 +9,7 @@ public class StringArrayUtils {
      * @return first element of specified array
      */ // TODO
     public static String getFirstElement(String[] array) {
-        return null;
+        return array[0];
     }
 
     /**
@@ -17,7 +17,7 @@ public class StringArrayUtils {
      * @return second element in specified array
      */
     public static String getSecondElement(String[] array) {
-        return null;
+        return array[1];
     }
 
     /**
@@ -25,7 +25,16 @@ public class StringArrayUtils {
      * @return last element in specified array
      */ // TODO
     public static String getLastElement(String[] array) {
-        return null;
+        //String[] array = {"brown", "fox", "jumps", "over", "the", "lazy", "dog"};
+            String word = "";
+        for(int i = 0; i < array.length -1; i++){
+                
+            return word = array[array.length-1];
+            
+        
+    
+        }
+        return word;
     }
 
     /**
@@ -33,7 +42,12 @@ public class StringArrayUtils {
      * @return second to last element in specified array
      */ // TODO
     public static String getSecondToLastElement(String[] array) {
-        return null;
+          String word = "";
+        for(int i = 0; i < array.length -2; i++){
+                
+            return word = array[array.length-2];
+        }
+        return word;
     }
 
     /**
@@ -42,15 +56,29 @@ public class StringArrayUtils {
      * @return true if the array contains the specified `value`
      */ // TODO
     public static boolean contains(String[] array, String value) {
-        return false;
+        boolean hold = false;
+        for(String s:array){
+            if(s.equals(value)){
+            return hold = true;
+            }
+        }
+        
+        return hold;
     }
-
     /**
      * @param array of String objects
      * @return an array with identical contents in reverse order
      */ // TODO
     public static String[] reverse(String[] array) {
-        return null;
+        String [] t = new String [array.length]; 
+        for(int i = 0 ;i<array.length;i++){
+            t[i] = "";
+            for(int j = array[i].length()-1; j>= 0;j--){
+                t[i] +=array[i].substring(j,j+1);
+            }
+        }
+    
+        return t;
     }
 
     /**
@@ -58,6 +86,13 @@ public class StringArrayUtils {
      * @return true if the order of the array is the same backwards and forwards
      */ // TODO
     public static boolean isPalindromic(String[] array) {
+        String length = array.length;
+        
+        for(int i = 0;i<length;i++){
+            String start = array[0];
+            String end = array[length];
+        }
+        
         return false;
     }
 

package.bluej

@@ -0,0 +1,42 @@
+#BlueJ package file
+dependency1.from=StringArrayUtilsTest
+dependency1.to=StringArrayUtils
+dependency1.type=UsesDependency
+editor.fx.0.height=685
+editor.fx.0.width=1199
+editor.fx.0.x=50
+editor.fx.0.y=27
+objectbench.height=102
+objectbench.width=461
+package.divider.horizontal=0.6
+package.divider.vertical=0.7988929889298892
+package.editor.height=426
+package.editor.width=674
+package.editor.x=20
+package.editor.y=43
+package.frame.height=600
+package.frame.width=800
+package.numDependencies=1
+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=StringArrayUtilsTest
+target1.showInterface=false
+target1.type=UnitTestTargetJunit4
+target1.width=150
+target1.x=130
+target1.y=10
+target2.height=50
+target2.name=StringArrayUtils
+target2.showInterface=false
+target2.type=ClassTarget
+target2.width=120
+target2.x=70
+target2.y=70