方法（构造方法）与方法重载

01：设计一个Dog类，有名字、颜色和年龄属性，提供无参的构造方法和一个有参的构造方法，定义输出方法show()显示其信息。

使用有参构造方法创建一个对象，并输出该对象的信息。

package cn.bdqn.Lianxi;
 
public class Dog {
			private String name;
			private String colour;
			private int age;
			public Dog() {
			}
			public Dog(String name, String colour, int age) {
				this.name = name;
				this.colour = colour;
				this.age = age;
			};
			public void show(){
				System.out.println("宠物信息：名字："+this.name+"，颜色："+this.colour+"，年龄："+this.age);
			}
}
 
 
 
 
 
 
 
 
 
 
package cn.bdqn.Lianxi;
 
public class DogTest {
 
	public static void main(String[] args) {
			Dog dog = new Dog("tony","粉色",5);
			dog.show();
				
			}
}

02：写一个人的类

属性：名字，性别，年龄；提供无参的构造方法和一个有参的构造方法

使用有参构造方法创建一个对象：姓名为“张三”，性别为“男”，年龄25.

package cn.bdqn.Lianxi;
 
package cn.bdqn.Lianxi;
 
public class Person {
	private String name;
	private char gender;
	private int age;
 
	public Person() {
	}
 
	public Person(String name, char gender, int age) {
		super();
		this.name = name;
		this.gender = gender;
		this.age = age;
	}
    public void printInfo() {
		System.out.println("姓名是：" + this.name + "，性别是：" +this.gender + "，年龄是："
				+ this.age);
	}
}
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
package cn.bdqn.Lianxi;
 
public class PersonTest {
 
	public static void main(String[] args) {
			Person person = new Person("张三",'男',25);
			person.printInfo();
	}
 
}

03：写一个汽车类：

属性：品牌；车长；颜色；价格；

提供无参的构造方法和一个有参的构造方法

使用有参构造方法创建五个对象：“捷达”，“宝马”，“劳斯莱斯”，“科鲁兹”，“迈锐宝”

package cn.bdqn.Lianxi;
 
public class Car {
	private String paizi;
	private double length;
	private String colour;
	private int price;
	public Car() {
	}
	public Car(String paizi, double length, String cloro, int price) {
		this.paizi = paizi;
		this.length = length;
		this.colour = colour;
		this.price = price;
	}
	public void printInfo(){
		System.out.println("品牌是："+this.paizi+"，车长是："+this.length+"，颜色是："+this.colour+"，价格是："+this.price);
	}
}
 
 
 
 
 
 
 
 
 
package cn.bdqn.Lianxi;
 
public class CarTest {
 
	public static void main(String[] args) {
			Car car1 = new Car("捷达",500,"粉色",1000000);
			Car car2 = new Car("宝马",500,"粉色",1000000);
			Car car3 = new Car("劳斯莱斯",500,"粉色",1000000);
			Car car4 = new Car("科鲁兹",500,"粉色",1000000);
			Car car5 = new Car("迈锐宝",500,"粉色",1000000);
		    car1.printInfo();
		    car2.printInfo();
		    car3.printInfo();
		    car4.printInfo();
		    car5.printInfo();
	}
}

04：写一个课程类：

属性：课程名；学时；任课老师；

提供无参的构造方法和一个有参的构造方法

使用有参构造方法创建五个对象：“c语言”，“Java编程”，“php网络编程”，“c++”，“数据结构”

package cn.bdqn.Lianxi;
 
public class School {
	private String course;
	private int hour;
	private String teacher;
	public School() {
	}
	
	public School(String course, int hour, String teacher) {
		this.course = course;
		this.hour = hour;
		this.teacher = teacher;
	}
	public void printInfo(){
		System.out.println("课程名是："+this.course+"，学时："+this.hour+"，任课老师："+this.teacher);
	}
}
 
 
 
 
 
 
 
 
 
 
package cn.bdqn.Lianxi;
 
public class SchoolTest {
 
	public static void main(String[] args) {
			School school1 = new School("c语言",10,"张三");
			School school2 = new School("Java编程",10,"张三");
			School school3 = new School("php网络编程",10,"张三");
			School school4 = new School("c++",10,"张三");
			School school5 = new School("数据结构",10,"张三");
			school1.printInfo();
			school2.printInfo();
			school3.printInfo();
			school4.printInfo();
			school5.printInfo();
	}
 
}
 

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