Java字符串串联 [英] Java String Concatenation
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问题描述
我的Java代码有问题。我昨天问了同样的问题。我得到了答案,但是很抱歉这是我的错。我的问题不清楚。
我的代码看起来像这样:
for(i = 0; i< geo.getTargets()。length; i ++)
{
if(geo.getTargets(i).getTargetType()。equalsIgnoreCase( ProximityTarget))
{
final ProximityTarget prox =(ProximityTarget)geo.getTargets(i);
prox.getGeoPoint()。getLatitudeInMicroDegrees();
prox.getGeoPoint()。getLongitudeInMicroDegrees();
prox.getRadiusDistanceUnits();
}
}
以上三种方法将给我一些价值。 / p>
我希望这些值以这种格式放置:
circle :long:lat:radius |圆:长:纬:半径| .....
任何人都可以帮助我修复此代码。我希望将这些值连接在一个字符串中,以便将其插入到我的数据库字段中。
解决方案
使用String +
运算符进行操作的基本方式。
字符串结果=;
for(i = 0; i< geo.getTargets()。length; i ++){
if(geo.getTargets(i).getTargetType()。equalsIgnoreCase( ProximityTarget)){
final ProximityTarget prox =(ProximityTarget)geo.getTargets(i);
float经度= prox.getGeoPoint()。getLatitudeInMicroDegrees());
float lat = prox.getGeoPoint()。getLongitudeInMicroDegrees());
浮动半径= prox.getRadiusDistanceUnits();
if(!result.isEmpty()){
结果+ = |;
}
结果+ =(圆圈: +经度+: +纬度+: +半径);
}
}
返回结果;
I have a issue with my java code. i asked the same question yesterday. I got answer but sorry it was my fault. My question is not clear.
I have code looks like this:
for(i = 0; i < geo.getTargets().length ; i++ )
{
if(geo.getTargets(i).getTargetType().equalsIgnoreCase("ProximityTarget"))
{
final ProximityTarget prox = (ProximityTarget)geo.getTargets(i);
prox.getGeoPoint().getLatitudeInMicroDegrees();
prox.getGeoPoint().getLongitudeInMicroDegrees();
prox.getRadiusDistanceUnits();
}
}
The above three method will give me some values.
I want these values to be place in this format:
circle:long:lat:radius | circle:long:lat:radius | .....
Can any one help me in fixing this code. I would like these value to be concatenated in a single string in order to insert it into my database field.
解决方案
This is the basic way of doing what you asked for with String +
operator.
String result = "";
for(i = 0; i < geo.getTargets().length ; i++ ){
if(geo.getTargets(i).getTargetType().equalsIgnoreCase("ProximityTarget")){
final ProximityTarget prox = (ProximityTarget)geo.getTargets(i);
float longitude = prox.getGeoPoint().getLatitudeInMicroDegrees());
float lat = prox.getGeoPoint().getLongitudeInMicroDegrees());
float radius = prox.getRadiusDistanceUnits();
if (!result.isEmpty()) {
result += "|";
}
result += ("circle:" + longitude + ":" + lat + ":" + radius);
}
}
return result;
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