java 第二次作业

1.编写人类与测试类

package person;

public class person {
	String name;
	char sex;
	int age;
	String num;
	
	public person(String name,char sex,int age,String num) {
		this.name=name;
		this.sex=sex;
		this.age=age;
		this.num=num;
		
	}



    public static void main(String[] args) {
        person s1=new person("张三",'男',18,"430101010101010101");
        person s2=new person("李四",'女',18,"123456789009876543");
        System.out.println("姓名："+s1.name+",性别："+s1.sex+",年龄："+s1.age+",身份证号码："+s1.num);
        System.out.println("姓名："+s2.name+",性别："+s2.sex+",年龄："+s2.age+",身份证号码："+s2.num);
    }

}

2.编写“手机”类及测试类

package person;

public class Phone {
String brind;//手机品牌
String size;//手机型号
public Phone(String brind,String size) {
this.brind=brind;
this.size=size;
}

public static void main(String[] args) {
	// TODO Auto-generated method stub
	Phone s1=new Phone("华为","荣耀3C");
	Phone s2=new Phone("联想","A3600D");
	Phone s3=new Phone("小米","note");
	
	System.out.println("手机品牌；"+s1.brind+",手机型号；"+s1.size);
	System.out.println("手机品牌；"+s2.brind+",手机型号；"+s2.size);
	System.out.println("手机品牌；"+s3.brind+",手机型号；"+s3.size);

}

}

![](https://img2018.cnblogs.com/blog/1632974/201904/1632974-20190408194651494-1472230872.png)

3.编写书籍类及测试类

package person;

public class book {
	String name;
	String number;
	String editor;
	String publish;
	int year;
	int x;
	int price;
	
	public book(String name,String number,String editor,String publish,int year,int x,int price) {
		this.name=name;
		this.number=number;
		this.editor=editor;
		this.publish=publish;
		this.year=year;
		this.x=x;
		this.price=price;
	}

	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		book s1=new book("老人与海","003568","海明威","海明威出版社",1978,200,58);
		book s2=new book("假如给我三天光明","005800","海勒","hell出版社",1998,78,36);
		
		System.out.println("名字:"+s1.name+",书号:"+s1.number+",主编:"+s1.editor+",出版社:"+s1.publish+",出版日期:"+s1.year+",页码:"+s1.x+",价格:"+s1.price);
		System.out.println("名字:"+s2.name+",书号:"+s2.number+",主编:"+s2.editor+",出版社:"+s2.publish+",出版日期:"+s2.year+",页码:"+s2.x+",价格:"+s2.price);

	}

}

4.编写“圆柱体”类及测试类

package person;

public class round {
final float PI=3.14f;
float r;
float h;
public round(float r,float h) {
this.r=r;
this.h=h;

        System.out.println("圆底半径="+r+",高="+h+",底面积="+PI*r*r+",体积="+PI*r*r*h);
    }

public static void main(String[] args) {
	// TODO Auto-generated method stub
	
	round s1=new round(2.1f,3.5f);
    round s2=new round(2.3f,5.0f);

}

}

![](https://img2018.cnblogs.com/blog/1632974/201904/1632974-20190408194807218-2129173876.png)

作业总结：总体来说，这四题作业是属于较为基础的题目，可是我却花了很多时间才把它写完的，这和平时的练习是息息相关的，平时练习少导致了写程序时遇到各种基础的问题却没办法去解决。这次作业刚开始我是不知道怎么动笔的，是通过借鉴同学们的作业然后自己才开始慢慢尝试着写，所以我认识到了练习的重要性，之后一有时间我会尽量得去做些练习来让自己更加熟练。