Added files and updated config.

config.json

@@ -136,6 +136,11 @@
       "topics": []
     },
     {
+      "slug": "run-time-encoding",
+      "difficulty": 5,
+      "topics": []
+    },
+    {
       "slug": "word-count",
       "difficulty": 5,
       "topics": []

exercises/run-length-encoding/build.gradle

@@ -0,0 +1,17 @@
+apply plugin: "java"
+apply plugin: "eclipse"
+apply plugin: "idea"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testCompile "junit:junit:4.12"
+}
+test {
+    testLogging {
+        exceptionFormat = 'full'
+        events = ["passed", "failed", "skipped"]
+    }
+}

exercises/run-length-encoding/src/example/java/RunLengthEncoding.java

@@ -0,0 +1,9 @@
+public class RunLengthEncoding {
+    public String encode(String input) {
+        throw new UnsupportedOperationException("Method has not been implemented yet.");
+    }
+
+    public String decode(String input) {
+        throw new UnsupportedOperationException("Method has not been implemented yet.");
+    }
+}

exercises/run-length-encoding/src/main/java/RunLengthEncoding.java

@@ -0,0 +1,9 @@
+public class RunLengthEncoding {
+    public String encode(String input) {
+        throw new UnsupportedOperationException("Method has not been implemented yet.");
+    }
+
+    public String decode(String input) {
+        throw new UnsupportedOperationException("Method has not been implemented yet.");
+    }
+}

exercises/run-length-encoding/src/test/java/RunLengthEncodingTest.java

@@ -0,0 +1,79 @@
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Ignore;
+import org.junit.Test;
+
+public class RunLengthEncodingTest {
+    private RunLengthEncoding runLengthEncoding;
+
+    @Before
+    public void setUp() {
+        runLengthEncoding = new RunLengthEncoding();
+    }
+
+    @Test
+    public void encodeEmpty() {
+        Assert.assertEquals("", runLengthEncoding.encode(""));
+    }
+
+    @Test
+    public void decodeEmpty() {
+        Assert.assertEquals("", runLengthEncoding.decode(""));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void encodeWithOnlySingleValues() {
+        Assert.assertEquals("XYZ", runLengthEncoding.encode("XYZ"));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void decodeWithOnlySingleValues() {
+        Assert.assertEquals("XYZ", runLengthEncoding.decode("XYZ"));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void encodeWithMixedValues() {
+        Assert.assertEquals("12WB12W3B24WB", runLengthEncoding.encode("WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB"));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void decodeWithMixedValues() {
+        Assert.assertEquals("WWWWWWWWWWWWBWWWWWWWWWWWWBBBWWWWWWWWWWWWWWWWWWWWWWWWB", runLengthEncoding.decode("12WB12W3B24WB"));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void encodeWithWhitespaceValues() {
+        Assert.assertEquals("2 hs2q q2w2 ", runLengthEncoding.encode("  hsqq qww  "));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void decodeWithWhitespaceValues() {
+        Assert.assertEquals("  hsqq qww  ", runLengthEncoding.decode("2 hs2q q2w2 "));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void encodeWithLowercaseValues() {
+        Assert.assertEquals("2a3b4c", runLengthEncoding.encode("aabbbcccc"));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void decodeWithLowercaseValues() {
+        Assert.assertEquals("aabbbcccc", runLengthEncoding.decode("2a3b4c"));
+    }
+
+    @Ignore("Remove to run test")
+    @Test
+    public void encodeThenDecode() {
+        String inOut = "zzz ZZ  zZ";
+        String encoded = runLengthEncoding.encode(inOut);
+        Assert.assertEquals(inOut, runLengthEncoding.decode(encoded));
+    }
+}