Re: [Lejos-discussion] drawString method and memory

Eric Dalquist Mon, 22 Oct 2007 10:14:40 -0700

I use static variables for all of my strings to ensure they aren't created multiple times. Also beware that using the final keyword with a String will cause a memory leak as well.


-Eric


Lawrie Griffiths wrote:

Hi Carlos,

You just declare a string variable outside the loop. It is not LCD.drawString that is the problem, but any use of a string literal:


String miRobot = "miRobot";
while (!Button.ESCAPE.isPressed()) {
  LCD.clear();
  LCD.drawString(miRobot, 0,0);
  LCD.drawInt( (int)(Runtime.getRuntime().freeMemory()),0,1);
  LCD.refresh();
}

Lawrie

----- Original Message ----- From: "Carlos Agüero" <[EMAIL PROTECTED]>

To: "leJOS Discussion List" <[email protected]>
Sent: Monday, October 22, 2007 3:31 PM
Subject: [Lejos-discussion] drawString method and memory

Hi everybody,

as you know, every time we do a call to drawString() mehod, a new String
is created and we loose some bytes of memory.

Is there any way or trick to avoid this loss of memory in case of we
need to use several calls to drawString().

Imagine a simple loop:

while (!Button.ESCAPE.isPressed()) {
LCD.clear();
LCD.drawString("miRobot", 0,0);
LCD.drawInt( (int)(Runtime.getRuntime().freeMemory()),0,1);
LCD.refresh();
}

Is there any way to execute this kind of code without loosing all the
memory?

Thanks,
Carlos

--
Carlos E. Agüero Durán  |  Grupo de Sistemas y Comunicacines (GSyC)
http://gsyc.es/~caguero |  Universidad Rey Juan Carlos


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Re: [Lejos-discussion] drawString method and memory

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