import java.util.*; public class bbb{ public static void main(String [] args){ List <aaa> c = null; aaa d = null; d.setNo(1); d.setName("test"); c.add(d); System.out.println(c.get(0).getNo()); System.out.println(c.get(0).getName()); } } class aaa { int no; String name; public aaa(){ } public int getNo(){ return no;} public void setNo(int newNo){no = newNo;} public String getName(){return name;} public void setName(String newName){ name = newName;} }