[Java-player-users] Problems with laserinterface

[kevinl <liu...@gm...>]

Hi all,
I don't know how to use the laserInterface, so I run the following code for
a try:
lsri = robot.requestInterfaceLaser (0, PlayerConstants.PLAYER_OPEN_MODE);
while(lsri.isDataReady());
	lnum=lsri.getData().getRanges_count();
	lsri.getData().getRanges();
	ldata=lsri.getData().getRanges();

I get the error of "NullPointerException". Could you advise me on how to use
the laserInterface? And I am confused with the method "public void
readData(PlayerMsgHdr header)" , how can I get a PlayerMsgHdr variable?

Thanks a lot,
kevin.

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