new helper class: StringHelper

src/org/hwo/StringHelper.java

@@ -0,0 +1,23 @@
+package org.hwo;
+
+import java.util.Collection;
+import java.util.Iterator;
+
+public class StringHelper {
+
+	public static String join(Collection<?> c,String del)
+	{
+		StringBuilder sb = new StringBuilder();
+		Iterator<?> iter = c.iterator();
+		while (iter.hasNext())
+		{
+			sb.append(iter.next());
+			if (!iter.hasNext())
+				break;
+			sb.append(del);
+		}
+		return sb.toString();
+	}
+	
+	
+}