Ê®¶þ javaÃæÏò¶ÔÏó³ÌÐòÉè¼Æ(ÀàµÄ¼Ì³Ð)
Ê®¶þ javaÃæÏò¶ÔÏó³ÌÐòÉè¼Æ(ÀàµÄ¼Ì³Ð)
/**
* ÀàµÄ¼Ì³Ð
*/
class Person
{
private String name;
private int age;
public String setName(String name){this.name = name;return name;}
public int setAge(int age){this.age = age;return age;}
public void getInfo()
{
System.out.println("name = " + name + ", age = " + age);
}
}
/*
class Student //StudentÀàÖØ¸´¶¨ÒåÁËPersonÀàµÄ·½·¨ºÍ³ÉÔ±±äÁ¿
{
private String name;
private int age;
public String setName(String name){this.name = name;return name;}
public int setAge(int age){this.age = age;return age;}
public void getInfo()
{
System.out.println("name = " + name + ", age = " + age);
}
private String school;
public String setSchool(String school){this.school = school; return school;}
public void study()
{
System.out.println("study in " + school);
}
}
*/
/**
* 1,ͨ¹ý¼Ì³Ð¿ÉÒÔ¼ò»¯ÀàµÄ¶¨Òå ¡£
*/
class Student extends Person //ͨ¹ý¼Ì³Ð,ÕâÐ©ÖØ¸´µÄ¶¨Ò彫±»Ê¡ÂÔ.
{
private String school;
public String setSchool(String school){this.school = school; return school;}
public void study()
{
System.out.println("study in " + school);
}
public static void main(String[] args)
{
Person p1 = new Person();
p1.setName("unknown");p1.setAge(0);
//p1.setSchool("unknown");´íÎó,¸¸À಻ÄÜ·ÃÎÊ×ÓÀàµÄ³ÉÔ±.
p1.getInfo();
//p1.study();´íÎó,¸¸À಻ÄÜ·ÃÎÊ×ÓÀàµÄ³ÉÔ±.
Person p2 = new Student();
p2.setName("mike");
p2.setAge(23);
((Student)p2).setSchool("Cambridge");
p2.getInfo();
((Student)p2).study();
//¸¸ÀàµÄ¶ÔÏó¿ÉÒÔÏòÏÂתÐÍ.
Student s1 = new Student();
s1.setName("jackson");
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public class Factory {
private static Factory factory;
private static Object classLock=Factory.class;
private Factory(){}
public static Factory getFactory(){
synchronized(classLock){
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