Java String Concatenation

Question

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.

Answer 1

Try this:

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();

Answer 2

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;