import java.util.Arrays;
public class MuilInterfaceTest
{
public static void main(String[] args)
{
Student[] staff = new Student[3];
staff[0] = new Student("Tom", "20031020");
staff[1] = new Student("Jack", "20031022");
staff[2] = new Student("Rose", "20021023");
Arrays.sort(staff); ××××需要实现接口 Comparable;
for(int i = 0; i < staff.length; i++)
{
System.out.println((Student)staff[i]);
}
}
}
interface Person
{
String getName();
String getSex();
String getBirthday();
String getAddress();
void setAddress(String strAddress);
}
class Student implements Person, Comparable
{
private String strName = "";//学生姓名
private String strNumber = "";//学号
private String strSex = "";//性别
private String strBirthday = "";//出生年月
private String strSpeciality = "";//专业
private String strAddress = "";//地址
public Student(String name, String number)
{
strName = name;
strNumber = number;
}
public int compareTo(Object otherObject)
{
Student other = (Student)otherObject;
int otherNumber = Integer.parseInt(other.strNumber);
int thisNumber = Integer.parseInt(this.strNumber);
if(thisNumber > otherNumber)
return 1;
else if (thisNumber == otherNumber)
return 0;
else
return -1;
}
public String getName()
{ ....................
. .................
}
public String toString()
{
String information = "学生姓名=" + strName + ", 学号=" + strNumber;
if( !strSex.equals("") )
information += ", 性别=" + strSex;
if( !strBirthday.equals(""))
information += ", 出生年月=" + strBirthday;
if( !strSpeciality.equals("") )
information += ", 专业=" + strSpeciality;
if( !strAddress.equals("") )
information += ", 籍贯=" + strAddress;
return information;
}
}
compareTo 个方法是怎么实现的?并没有变量调用它呀?
也没有声明为abstract类呀??
不懂。
谢谢。