java 类

1.class  类

    classStudent {

  intid;// field or data member or instance variable

   Stringname;

   publicstaticvoidmain(Stringargs[]) {

        Students1=newStudent();      // creating an object of Student

        System.out.println(s1.id);      // 0

        System.out.println(s1.name);    // null

    }

}