关于一个数组函数的问题

Question

这是我写的一个测试程序，想像people数组写入数据，可是却出现空指针一场，希望有人帮解答下，急 
public class test { /**
 * @param args
 */
public static void main(String[] args) {
People people[] = new People[1];
people[0].state="不在线";
people[0].icon = "1.gif";
System.out.println(people[0].state+people[0].icon);
}}
public class People{ public String name; public Integer number; public String password; public String icon;

public String state;}

Answer 1

People people[] = new People[1]; 
people[0]=new People();//对象数组中的对象默认为NULL，必须显示初始化。
people[0].state="不在线"; 

Answer 2

public class test {/**
* @param args
*/
public static void main(String[] args) {
People people[] = new People[1];
people[0] = new People("lili",123,"12346","1.gif","不在线");
System.out.println(people[0].state+people[0].icon);
}}
public class People{public String name;public Integer number;public String password;public String icon;public String state;public People(String name,Integer number,String password,String icon,String state){
   this.name = name;
   this.number = number;
   this.password = password;
   this.icon = icon;
   this.state = state;
}}