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);
}}
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);
}}
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。
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