?? nmeatokenizer.java
字號:
/***********************************************************************
* J a v a G P S - GPS access library and Java API *
* Copyright (C) 2001 Ulrich Walther *
* *
* This program is free software; you can redistribute it and/or *
* modify it under the terms of the GNU General Public License as *
* published by the Free Software Foundation; either version 2 of *
* the License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* You should have received a copy of the GNU General Public *
* License along with this program; if not, write to the Free *
* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
* MA 02111-1307 USA *
***********************************************************************/
package org.iu.gps;
/**
* Takes a NMEA-0183 message to tokenize.
*
*@author walther
*/
class NMEATokenizer {
private String msg;
NMEATokenizer( String _msg )
{
msg = _msg;
}
boolean hasMoreTokens()
{
return getPos() >= 0;
}
// return next token (filters delimiter)
String nextToken()
{
String t = msg.substring( 0, getPos() );
msg = msg.substring( getPos() + 1 );
return t;
}
// return position of next delimiter (, or *), -1 means no more delimiters
// available
private int getPos()
{
int p1 = msg.indexOf( "," );
int p2 = msg.indexOf( "*" );
if ( p1 == -1 && p2 == -1 )
{
return -1;
}
if ( p1 == -1 )
{
p1 = msg.length() - 1;
}
if ( p2 == -1 )
{
p2 = msg.length() - 1;
}
return Math.min( p1, p2 );
}
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -