help with some code lines

Hi, I have a problem, I need to understand some lines of the code for my exam, which is soon. But ont understand some codes lines or why they use it which are:

if ((xPos<p[i].xPos+10&&xPos>p[i].xPos-10)&&(yPos<p[i].opening-100||yPos>p[i].opening+100)) { end=false;

alfombra b = new alfombra(); columnas[] p = new columnas[3];

thats all. If you can reply me as soon as you can it would be great. thanks