java实验报告Object and Inheritance
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Report
Class：Q120101 Name：QianjunLiu No.：Q12010102
Course
Java
Programming
Language
Experi
ment
Name
Object and
Inheritance
Type
Verify Demo Integrated Design
Teacher Weimin Wu Score
1. Goal of this experiment
I.Know how to use Object, inheritance in Java;
ing Class, Object, Interface;
III.U sing tools to construct and implement Java applications.
2.Procedures
I. A program using Final, Abstract and Package.
●Step 1: type the following code and try to get to know the usage of
Final, Abstract and Package.
●Step 2: Summary the function of this program and learn the
relationship between class and object.
●Step 3:Please tell the function of each line.
II.A program using Interface.
●Step 1: type the following code and try to get to know the usage of
Interface.
●Step 2: Summary the function of this program and learn how to
use Interface.
●Step 3: Please tell the function of each line.
III. A program using Data and Time
Step 1: type the following code and try to understand Data and Time in Java.
●Step 2: Modify the source code to make it output different time
format. Such as:
Tue Sep 08 9:08:04 CST 2009 //toString
2009-9-8 9:08:04 //toLocalString
8 Sep 2009 01:08:04:GMT //toGMTString
●Step 3: Think about the time gap between two Dates or two Data
Times. How to calculate. And trying to modify the source code to make it reality( extends or Interface can be used).
A program using inheritance.
●Step 1: Analyze the following code and give the running
result:
IV.Make a program which can represent student. This class have the following property: studentID, classID, name, sex and age.
3.Recording of original data or result
(1)a programme of circle
Source code:
class CCircle
{
double pi;
double radius;
double getRadius(){
return radius;
}
void setCircle(double r, double p){
pi=p;
radius=r;
}
}
public class Ex2_1
{
public static void main(String args[]) {
CCircle cir1=new CCircle();
cir1.setCircle(2.0,3.1416);
System.out.println("radius="+cir1.getRadius());
}
}
(2)A program using Interface
Source code:
interface Sittable{
void sit();
}
interface Lie{
void sleep();
}
interface HealthCare{
void massage();
}
class Chair implements Sittable{
public void sit(){
System.out.println("It is sittable!");
};
}
class Sofa extends Chair implements Lie,HealthCare{ public void sleep(){
System.out.println("It is sleep!");
};
public void massage(){
System.out.println("give a message!");
};
public static void main(String[] args) {