Create 10b. Middle character or nothing

Week 2: Methods, strings and lists/10b. Middle character or nothing

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+Write the method
+
+char middleChar(String str)
+
+...which returns the middle character of the string.
+
+However, if the string contains an even number of characters (i.e. there is no middle character), 
+the method returns an empty line (i.e. a minus sign).
+
+
+
+An example of a method call:
+public static void main(String[] args) {
+    System.out.println(middleChar("abcde"));
+    System.out.println(middleChar("123"));
+    System.out.println(middleChar("wxyz"));
+}
+Program outputs:
+c
+2
+-
+
+
+
+
+
+
+
+import java.util.Random;
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+
+        // String - elements have dtype String
+        // [] means an array containing elements of the SAME TYPE
+        // s = string variable
+        String[] s = "first second third fourth donald test alphabet hello programming choochooo".split(" ");
+        // from string 's'
+        // iterate over every sub-string 'pa'
+        for (String pa : s) {
+            System.out.println("Testing with parameter " + pa);
+            System.out.println("Middle character: " + middleChar(pa));
+            System.out.println("");
+        }
+    }
+
+
+    //ADD
+    public static char middleChar(String str) {
+        int length = str.length();
+        if (length % 2 == 0) {
+            return '-';
+        } else {
+            return str.charAt(length / 2);
+        }
+    }
+    
+    
+}
+
+
+
+
+Testing with parameter first
+Middle character: r
+
+Testing with parameter second
+Middle character: -
+
+Testing with parameter third
+Middle character: i
+
+Testing with parameter fourth
+Middle character: -
+
+Testing with parameter donald
+Middle character: -
+
+Testing with parameter test
+Middle character: -
+
+Testing with parameter alphabet
+Middle character: -
+
+Testing with parameter hello
+Middle character: l
+
+Testing with parameter programming
+Middle character: a
+
+Testing with parameter choochooo
+Middle character: c
+
+