Java字符串连接

Question

我的java代码有问题.我昨天问了同样的问题.我得到了答案,但对不起,这是我的错.我的问题不明确.

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();
        }
    }

以上三种方法都会给我一些价值.

我希望这些值以这种格式放置:

circle:long:lat:radius | circle:long:lat:radius | .....

任何人都可以帮我修复这段代码.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.

Answer 1

试试这个:

StringBuilder sb = new StringBuilder();
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 (sb.isEmpty()) {
        sb.append("circle:" + longitude + ":" + lat + ":" + radius);
    else {
        sb.append(" | circle:" + longitude + ":" + lat + ":" + radius);
    }
  }
}
String result = sb.toString();