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diff --git a/server/tesi/src/com/company/suString.java b/server/tesi/src/com/company/suString.java
new file mode 100644
index 0000000..666febe
--- /dev/null
+++ b/server/tesi/src/com/company/suString.java
@@ -0,0 +1,96 @@
+package com.company;
+
+import java.util.ArrayList;
+import java.util.Collections;
+
+public class suString
+{
+	suString()
+	{}
+
+	
+	public static ArrayList<String> stringToArrayList(String string)
+	{
+		ArrayList<String> returnValue=new ArrayList<String>();
+		int j=0;
+		for(int i=0;i<string.length();i++)
+		{
+			if(string.charAt(i)=='/')
+			{
+					returnValue.add(string.substring(j,i));
+					j=i+1;
+			}
+			else if(i==string.length()-1)
+				returnValue.add(string.substring(j));
+		}
+		return returnValue;
+	}
+	
+	public static ArrayList<String> vectorStringToArrayList(String[] vectorString)
+	{
+		ArrayList<String> returnValue=new ArrayList<String>();
+		Collections.addAll(returnValue, vectorString);
+		return returnValue;
+	}
+	
+	public static String arrayListToString (ArrayList<String> arraylist)
+	{
+		String returnValue= "";
+		for(int i=0;i<arraylist.size();i++)
+		{
+			if(i<arraylist.size()-1)
+				returnValue=returnValue+arraylist.get(i)+"/";
+			else
+				returnValue=returnValue+arraylist.get(i);
+		}
+		return returnValue;
+	}
+	
+	public static String vectorStringToString(String[] vectorString)
+	{
+		return arrayListToString(vectorStringToArrayList(vectorString));
+	}
+	
+	public static String[] arrayListToVectorString (ArrayList<String> arraylist)
+	{
+		String[] returnValue=new String[arraylist.size()];
+		for(int i=0;i<arraylist.size();i++)
+			returnValue[i]=arraylist.get(i);
+		return returnValue;
+	}
+	
+	public static String[] stringToVectorString(String string)
+	{
+		return arrayListToVectorString(stringToArrayList(string));
+	}
+
+	public static String multiToString(ArrayList<String> input)
+	{
+		String returnValue=null;
+		int size=input.size();
+		for(int i=0;i<size;i++)
+		{
+			if(i==0)
+				returnValue=input.get(i);
+			else
+				returnValue=returnValue+"//"+input.get(i);
+		}
+		return returnValue;
+	}
+
+	public static ArrayList<String> stringToMultiArray(String input)
+	{
+		ArrayList<String> result=new ArrayList<String>();
+		int j=0;
+		for(int i=0;i<input.length();i++)
+		{
+			if(input.charAt(i)=='/') {
+				if (input.charAt(i + 1) == '/') {
+					result.add(input.substring(j, i));
+					j=i+2;
+				}
+			}
+		}
+		return result;
+	}
+}