用Java编写程序。(哪里错了)

public static void main(String[] args) {
Person s1 = new Person ();
Person s2 = new Person ();
s1.name ="张三";
s1.age =18;
s1.xuexiao ="湖南邮电";
s1.zhiye ="学生";
System.out.println(s1.name);
System.out.println(s1.age);
System.out.println(s1.xuexiao);
System.out.println(s1.zhiye);
s2.name ="李四";
s2.age =20;
s2.xuexiao ="湖南邮电";
s2.zhiye ="工人";
System.out.println(s2.name);
System.out.println(s2.age);
System.out.println(s2.xuexiao);
System.out.println(s2.zhiye);
}

得看看Person类怎么定义的

感觉没毛病呀，你有没有报错信息什么的，或者是不是person类有问题

建议题主用getter/setter的方式给对象属性赋值，这样一般都是不会出错的。