ostringstream

[zhbcool]

so i have this code that i had used in c++, but i don't know what i should i use in java...

	public String getStringMessageID()
	{
		ostringstream temp;
		temp << messageId;
		return temp.str();
	}

These are the errors for the above:
ostringstream cannot be resolved to a type Assignment 10/src Messages.java line 114 1209617205928 8023
Syntax error on token "<<", invalid AssignmentOperator Assignment 10/src Messages.java line 115 1209617205929 8024


I also have another error which i dont know what to do about, but would love some help on

	static void sortArray(Message msg[], int size)
	{
		Message temp;
		boolean swapped = true;
		int count = 0;
		for(int index = 0; index < size && swapped; index ++) 
		{
			swapped = false;

			for(int i = 0; i < (size - 1) - count; i ++)
			{
				if (msg[i].getDate() > msg[i + 1].getDate())
				{
					swapped = true;
					temp = msg[i];
					msg[i] = msg[i + 1];
					msg[i + 1] = temp;
					
				}
			}count ++;
		}
	}

Here is the error i get for this one:
The operator > is undefined for the argument type(s) java.lang.String, java.lang.String Assignment 10/src Mailbox.java line 90 1209618068710 8102


If you would like to see the rest of the code just let me know and i will post it