Added join method to StringUtil

src/zutil/StringUtil.java

@@ -27,6 +27,8 @@ package zutil;
 import zutil.converters.Converter;
 
 import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
 
 /**
  * This is a class whit utility methods.
@@ -128,6 +130,23 @@ public class StringUtil {
         return str.reverse().toString();
     }
 
+    /**
+     * @param   list        a list of object that toString() will be called on
+     * @param   delimiter   a String delimiter that will be added between every entry in the list
+     * @return a String containing all entries in the list with the specified delimiter in between entries
+     */
+	public static String join(Iterable<?> list, String delimiter){
+        StringBuilder str = new StringBuilder();
+        Iterator<?> it = list.iterator();
+        if(it.hasNext()) {
+            str.append(it.next());
+            while (it.hasNext()) {
+                str.append(delimiter).append(it.next());
+            }
+        }
+        return str.toString();
+    }
+
 	/**
 	 * Trims the given char and whitespace at the beginning and the end
 	 * 

src/zutil/db/DBUpgradeHandler.java

@@ -1,6 +1,6 @@
 package zutil.db;
 
-import com.sun.deploy.util.StringUtils;
+import zutil.StringUtil;
 import zutil.db.handler.ListSQLResult;
 import zutil.db.handler.SimpleSQLResult;
 import zutil.log.LogUtil;
@@ -18,7 +18,7 @@ import java.util.logging.Logger;
 /**
  * This class will take a reference DB and alter
  * the source DB to have the same structure.
- * NOTE: only works with sqllite
+ * NOTE: only works with SQLite
  *
  * Created by Ziver
  */
@@ -162,7 +162,7 @@ public class DBUpgradeHandler {
 
                     // Restoring data
                     logger.fine("Forced Upgrade: Restoring data for table: "+table);
-                    String cols = StringUtils.join(refStruct, ",");
+                    String cols = StringUtil.join(refStruct, ",");
                     target.exec(String.format(
                             "INSERT INTO %s (%s) SELECT %s FROM %s",
                             table, cols, cols, backupTable));

test/zutil/test/StringUtilTest.java

@@ -26,6 +26,9 @@ package zutil.test;
 import org.junit.Test;
 import zutil.StringUtil;
 
+import java.util.Arrays;
+import java.util.Collection;
+
 import static org.junit.Assert.assertEquals;
 
 public class StringUtilTest {
@@ -90,4 +93,12 @@ public class StringUtilTest {
                      "024  00 00 00 00 00 00 00 00  '........'",
                 StringUtil.formatBytesToString(data3));
     }
+
+	@Test
+	public void joinTest(){
+		assertEquals("", StringUtil.join(Arrays.asList(), ","));
+		assertEquals("1,2,3,4,5", StringUtil.join(Arrays.asList(1,2,3,4,5), ","));
+        assertEquals("animal,monkey,dog", StringUtil.join(Arrays.asList("animal", "monkey", "dog"), ","));
+        assertEquals("12345", StringUtil.join(Arrays.asList(1,2,3,4,5), ""));
+	}
 }