variable-names inside an array

[bateman23]

Hi,
i wonder if there is a way of storing and accessing variables inside an array.
To make things a little more clear, i used coding PHP and the following construct has been one of my favourite ones:

$checkarray=array("name", "street");
	foreach($checkarray as $value) {
		if(trim(${"$value"})=="") {
			${"error_"."$value"}="Error";
			$error++;
		} // end if
	} // end foreach

So "name" and "street" are variable-names, which i can access by ${"$value"}.
This was a wonderful way, of checking if forms have been completely filled out.
Is there any possibility doing this in java/jsp?

Thanks in advance,
Daniel

 

[sedj]

Never done PHP, but from the looks of it, and guessing, a direct conversion would be :

String[] checkArray = new String[] {"name", "street"};
String error = "";
int numErrors = 0;
for (int i = 0; i < checkArray.length; i++) {
	if (checkArray[i].trim().equals("")) {
		numErrors++;
		error += ("Error : " +checkArray[i]);
	}
}

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[bateman23]

Thanks for the hints sedj. An Array of objects did the job... - nearly

Object check[]= new Object[] {name, street}; // Array initialisieren
	for(int i=0;i<check.length;i++) {
		if(check[i].equals("")) {
			write=false;
			out.println("Error");
			// ** HERE ** here occured another problem **
		} // end if
	} // end for

Another problem, which occured is, that i'm not able to build a variable out of strings... At the line marked with ** HERE ** i want to fill an error-variable which is named "error_"+the name of the object.
For example. If the object is "name", the variable should be named "error_name",
if the object is "street" it should be called "error_street".
In PHP it's done that way:

${"error_"."$value"}="Error";

The Java code for each object would be:

error_name = "Error"; and
error_street = "Error";

so the problem is, that i have to build the variable names at runtime out of strings. (at least i think so)

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