demosuper.java

压缩包内是近180多个针对Java初学者编写的简单实例

class Person {
    public String name;
    public char sex;
    public int age;
        //设置默认值
    Person(){
    	name = "wangliangliang";
    	sex  = 'm';
    	age  = 18;
    }
    //对象作为构造函数的参数
    Person(Person p){
    	name = p.name;
    	sex = p.sex;
    	age =p.age;
    }
    //指定值初始化对象
    Person(String name,char sex,int age){
    	this.name = name;
    	this.sex = sex;
    	this.age = age;
    }
    //输出person的基本信息
    public void info(){
    	System.out.println("The Person "+name+" is a "+sex+", aged "+age);
    }
}
 //实现所有超类的构造函数
class Country extends Person{
	public String nation;
	 //设置默认值
	Country(){
		super();
		nation = "China";
	}
   //对象作为构造函数的参数
	Country(Country ch){
		super(ch);
		nation = ch.nation;
	}
   //指定值初始化类Chinese的对象
	Country(String n,char s,int a,String na){
		super(n,s,a);
		nation = na;
	}
	
}
public class DemoSuper {
   public static void main(String []args){
	   Country cou1 = new Country("zhanghua",'m',22,"China");
	   Country cou2 = new Country("chenyan",'f',21,"China");
	   Country cou3 = new Country();
	   Country cou4 = new Country(cou1);
	   System.out.print("The base info of the person is：");
	   cou1.info();
	   System.out.println("The nationality of the person is:"+cou1.nation);
	   System.out.print("The base info of the person is");
	   cou2.info();
	   System.out.println("The nationality of the person is:"+cou2.nation);
	   System.out.print("The base info of the person is：");
	   cou3.info();
	   System.out.println("The nationality of the person is:"+cou3.nation);
	   System.out.print("The base info of the person is");
	   cou4.info();
	   System.out.println("The nationality of the person is:"+cou2.nation);
   }
}