diff --git a/test/020-string/src/Main.java b/test/020-string/src/Main.java
new file mode 100644
index 0000000..bb8ce1f
--- /dev/null
+++ b/test/020-string/src/Main.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Simple string test.
+ */
+public class Main {
+    public static void main(String args[]) {
+        basicTest();
+        indexTest();
+    }
+
+    public static void basicTest() {
+        String baseStr = "*** This is a very nice string!!!";
+        String testStr;
+        int i;
+
+        testStr = baseStr.substring(4, baseStr.length() - 3);
+        System.out.println("testStr is '" + testStr + "'");
+
+        /* sloppy for loop */
+        for (i = 0; i < testStr.length(); i++)
+            System.out.print(testStr.charAt(i));
+        System.out.print("\n");
+
+        String testStr2 = "This is a very nice strinG";
+        if (testStr.length() != testStr2.length())
+            System.out.println("WARNING: stringTest length mismatch");
+
+        System.out.println("Compare result is " + testStr.compareTo(testStr2));
+
+        // expected: -65302
+        String s1 = "\u0c6d\u0cb6\u0d00\u0000\u0080\u0080\u0080\u0000\u0002\u0002\u0002\u0000\u00e9\u00e9\u00e9";
+        String s2 = "\u0c6d\u0cb6\u0d00\u0000\u0080\u0080\u0080\u0000\u0002\u0002\u0002\u0000\uffff\uffff\uffff\u00e9\u00e9\u00e9";
+        System.out.println("Compare unicode: " + s1.compareTo(s2));
+
+        try {
+            testStr.charAt(500);
+            System.out.println("GLITCH: expected exception");
+        } catch (StringIndexOutOfBoundsException sioobe) {
+            System.out.println("Got expected exception");
+        }
+    }
+
+    public static void indexTest() {
+        String baseStr = "The quick brown fox jumps over the lazy dog!";
+        String subStr;
+
+        subStr = baseStr.substring(5, baseStr.length() - 4);
+        System.out.println("subStr is '" + subStr + "'");
+
+        System.out.println("Indexes are: " +
+            baseStr.indexOf('T') + ":" +
+            subStr.indexOf('T') + ":" +
+            subStr.indexOf('u') + ":" +
+            baseStr.indexOf('!') + ":" +
+            subStr.indexOf('y') + ":" +
+            subStr.indexOf('d') + ":" +
+            baseStr.indexOf('x') + ":" +
+            subStr.indexOf('x', 0) + ":" +
+            subStr.indexOf('x', -1) + ":" +
+            subStr.indexOf('x', 200) + ":" +
+            baseStr.indexOf('x', 17) + ":" +
+            baseStr.indexOf('x', 18) + ":" +
+            baseStr.indexOf('x', 19) + ":" +
+            subStr.indexOf('x', 13) + ":" +
+            subStr.indexOf('x', 14) + ":" +
+            subStr.indexOf('&') + ":" +
+            baseStr.indexOf(0x12341234));
+    }
+}