中旬左右:哪个java高手帮我做几道小题啊?
来源:百度文库 编辑:高校问答 时间:2024/05/21 21:25:27
2、 第一题抽象类改写为接口。并实现其功能。
3、 把网络专业这一类的学生与计算机专业这一类的学生打包放在student学生这个包中。并引用自 己的类,输出自己是哪个专业的学生
1.
abstract class Student
{
public abstract void study();
}
class NetStu extends Student
{
public void study()
{
System.out.println("Internet");
}
}
class ProStu extends Student
{
public void study()
{
System.out.println("Programming");
}
}
public class StuDemo
{
public static void main(String[] args)
{
new NetStu().study();
new ProStu().study();
}
}
2.
interface StuStudy
{
public void study();
}
class NetStu implements StuStudy
{
public void study()
{
System.out.println("Internet");
}
}
class ProStu implements StuStudy
{
public void study()
{
System.out.println("Programming");
}
}
public class StuDemo
{
public static void main(String[] args)
{
new NetStu().study();
new ProStu().study();
}
}
3.
// Student.java
package StudentStudy;
public abstract class Student
{
public abstract void study();
}
// StuDemo.java
import StudentStudy.*;
class NetStu extends Student
{
public void study()
{
System.out.println("Internet");
}
}
class ProStu extends Student
{
public void study()
{
System.out.println("Programming");
}
}
public class StuDemo
{
public static void main(String[] args)
{
new NetStu().study();
new ProStu().study();
}
}