in-class activities

src/edu/macalester/comp124/stringtransformer/VowelBleeper.java

@@ -0,0 +1,31 @@
+package edu.macalester.comp124.stringtransformer;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Created by Kim eng on 2/27/14.
+ */
+public class VowelBleeper extends StringTransformer{
+
+    @Override
+    public String transform(String s) {
+        for (int i = 0; i < s.length(); i++) {
+            char ch = s.charAt(i);
+            List<Character> charList = Arrays.asList('a', 'e', 'i', 'o', 'u', 'A', 'E', 'I', 'O', 'U');
+            if (charList.contains(ch)) {
+                s = s.replace(ch, '*');
+            }
+        }
+        return s;
+    }
+
+
+
+    public String replace(char oldChar, char newChar) {return String.valueOf(newChar);}
+
+    @Override
+    public String toString() {
+        return "Bleeps out all the vowels!";
+    }
+}

test/edu/macalester/comp124/stringtransformer/VowelBleeperTest.java

@@ -0,0 +1,23 @@
+package edu.macalester.comp124.stringtransformer;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Created by Kim eng on 2/27/14.
+ */
+public class VowelBleeperTest {
+    private final StringTransformer capitalizer = new VowelBleeper();
+
+    @Test
+    public void handlesEmptyString() {
+        assertEquals("", capitalizer.transform(""));
+    }
+
+    @Test
+    public void capitalizesAll() {
+        assertEquals("*", capitalizer.transform("a"));
+        assertEquals("*", capitalizer.transform("A"));
+    }
+}