student2.java

java课程的资料以及实验的代码

class Student2
{
   String name;
   int age;
   Student2(String name,int age)
   {
   	this.name=name;
   	this.age=age;
   }
   public void display()
   {
   	System.out.println("name="+name);
   	System.out.println("age="+age);
   }

}

class Llndergraduate extends Student2
{
	String specialty;
	Llndergraduate(String name,int age,String specialty)
	{
		super(name,age);
		this.specialty=specialty;
	}
	public void display()
	{
		super.display();
		System.out.println("Specialty="+specialty);
	}
}
class PostGraduate extends Student2
{
	String studyDirection;
	PostGraduate(String name,int age,String studyDirection)
    {
    	super(name,age);
    	this.studyDirection=studyDirection;
    	
    }
    public void display()
    {
    	super.display();
    	System.out.println("StudyDirection="+studyDirection);
    }
}
class TestDemo
{
	public static void main(String args[])
	{
	
	Student2 st=new Student2("Join",23);
	Llndergraduate lg=new Llndergraduate("Ron",22,"English");
	PostGraduate pg=new PostGraduate("Jack",18,"Iltelin computer");
	st.display();
	lg.display();
	pg.display();
	}
}