java中如何一个类如何调用另一个类的方法和变量，最好讲个短点的例子？

"并使用对象调用方法，创建若干学生并显示他们的数据！"这句话我点问题哦，创建对象一般不是调用方法来创建的。是直接用构造方法来new 的。下面这个程序可以说明从一个类中调用另一个类的方法。

class Student {
int studentNo ;
String studentName;

public void setStudent (int studenteNo, String studentName) {
this.studentName = studentName;
this.studentNo = studenteNo;
}

public void show () {
System.out.println("学号：" + this.studentNo + " 姓名:" + this.studentName + "\n");
}
}

public class Test{
public static void main(String[] args) {
Student st1 = new Student ();
st1.setStudent(1,"小明");
Student st2 = new Student ();
st2.setStudent(2,"小强");

st1.show();
st2.show();

}
}

public class testStudent {
public static void main(String[] args) {
// TODO Auto-generated method stub
Student s=new Student();
s.setName("张三");
s.setAge(20);
System.out.println(s);
Student s1=new Student("王五",21);
System.out.println(s1);
}

}

class Student {

public Student(String name, int age) {
super();
this.name = name;
this.age = age;
}
public Student() {
}
private String name;
private int age;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

public int getAge() {
return age;
}

public void setAge(int age) {
this.age = age;
}
public String toString() {
return "学生的姓名是\t"+name+"学生的年龄是\t"+age;
}

}

1，二楼说的说的都对。想比较，二楼看起来更舒服，明白点！

太简单