这java段代码什么意思

Question

public class Quadrangle{
private Quadrangle[] quest = new Quadrangle[6];
private int nextIndex = 0;
public void draw(Quadrangle q){
if(nextIndex<quest.length){ // 没看懂
quest[nextIndex]=q; // 没看懂
System.out.println(nextIndex);
nextIndex++; //没看懂
}
}
}

Answer 1

if(nextIndex<quest.length){ // 判断nextIndex是否超出了quest的元素范围
quest[nextIndex]=q; // 将q赋给quest容器的nextIndex位置上的元素
System.out.println(nextIndex);
nextIndex++; //将nextIndex的值加一
}