diff -r c9bd3298669d -r 5554cdeb2854 Lib/test/test_StringIO.py
--- a/Lib/test/test_StringIO.py	Thu Mar 21 18:34:45 2013 -0700
+++ b/Lib/test/test_StringIO.py	Thu Mar 21 22:09:16 2013 -0700
@@ -128,7 +128,6 @@
 class TestcStringIO(TestGenericStringIO):
     MODULE = cStringIO
 
-    @unittest.skipIf(test_support.is_jython, "FIXME #1862: not working in Jython")
     def test_array_support(self):
         # Issue #1730114: cStringIO should accept array objects
         a = array.array('B', [0,1,2])
diff -r c9bd3298669d -r 5554cdeb2854 src/org/python/modules/cStringIO.java
--- a/src/org/python/modules/cStringIO.java	Thu Mar 21 18:34:45 2013 -0700
+++ b/src/org/python/modules/cStringIO.java	Thu Mar 21 22:09:16 2013 -0700
@@ -12,6 +12,7 @@
 package org.python.modules;
 
 import org.python.core.Py;
+import org.python.core.PyArray;
 import org.python.core.PyIterator;
 import org.python.core.PyList;
 import org.python.core.PyObject;
@@ -51,6 +52,15 @@
         return new StringIO(buffer);
     }
 
+    /**
+     * Create a StringIO object, initialized by an array's byte stream.
+     * @param array       The initial value, from an array.
+     * @return          a new StringIO object.
+     */
+    public static StringIO StringIO(PyArray array) {
+        return new StringIO(array);
+    }
+
 
     /**
      * The StringIO object
@@ -73,6 +83,10 @@
             buf = new StringBuilder(buffer);
         }
 
+        public StringIO(PyArray array) {
+            buf = new StringBuilder(array.tostring());
+        }
+
         private void _complain_ifclosed() {
             if (closed)
                 throw Py.ValueError("I/O operation on closed file");