1. 编程创建一个person类,在其中包括域(姓名,性别,年龄,职业)和方法(获得姓名,性别,修改年龄,职业)。
2.将person类作为父类,创建子类student和teacher。
3.随机产生一组student与teacher的对象,并用person类型的数组进行管理,输出每个对象的姓名,性别,年龄以及职业。
public class J_person
{
public String m_name;
public String m_sex;
public int m_age;
public String m_job;
public J_person(String name,String sex,int age,String job)
{
getData(name,sex);
setData(age,job);
}
public void getData(String name,String sex)
{
m_name=name;
m_sex=sex;
}
public void setData(int age,String job)
{
m_age=age;
m_job=job;
}
}public class J_student extends J_person
{
public J_student()
{
super("Lily","Female",19,"Student");
{
J_student a=new J_student();
J_person c=a;
return(c);
}
}
}public class J_teacher extends J_person
{
public J_teacher()
{
super("John","Male",25,"Teacher");
J_teacher b=new J_teacher();
J_person d=b;
}
return(d);
}import static java.lang.Math.random;public class J_a
{
public double getnum()
{
double t;
t=random();
return(t);
}
}class J_run
{
public static void main(String args[])
{
J_person();
J_student();
J_teacher();
char person;
J_person [] person={c,d};
getnum();
if(t>=0.0&&t<0.5)
System.out.println(c);
else
System.out.println(d);
}
}这是我编的程序,有很多错,希望高人指点,多谢了!
2.将person类作为父类,创建子类student和teacher。
3.随机产生一组student与teacher的对象,并用person类型的数组进行管理,输出每个对象的姓名,性别,年龄以及职业。
public class J_person
{
public String m_name;
public String m_sex;
public int m_age;
public String m_job;
public J_person(String name,String sex,int age,String job)
{
getData(name,sex);
setData(age,job);
}
public void getData(String name,String sex)
{
m_name=name;
m_sex=sex;
}
public void setData(int age,String job)
{
m_age=age;
m_job=job;
}
}public class J_student extends J_person
{
public J_student()
{
super("Lily","Female",19,"Student");
{
J_student a=new J_student();
J_person c=a;
return(c);
}
}
}public class J_teacher extends J_person
{
public J_teacher()
{
super("John","Male",25,"Teacher");
J_teacher b=new J_teacher();
J_person d=b;
}
return(d);
}import static java.lang.Math.random;public class J_a
{
public double getnum()
{
double t;
t=random();
return(t);
}
}class J_run
{
public static void main(String args[])
{
J_person();
J_student();
J_teacher();
char person;
J_person [] person={c,d};
getnum();
if(t>=0.0&&t<0.5)
System.out.println(c);
else
System.out.println(d);
}
}这是我编的程序,有很多错,希望高人指点,多谢了!
public String name;
public String sex;
public int age; public Person(String name, String sex, int age) {
this.name = name;
this.sex = sex;
this.age = age;
}
}Student:
public class Student extends Person {
public String job; public Student(String name, String sex, int age, String job) {
super(name, sex, age);
this.job = job;
}
public String toString(){
return "name:" + name + "\nsex:" + sex + "\nage:" + age + "\njob:" + job;
}
}
Teacher:public class Teacher extends Person {
private String job; public Teacher(String name, String sex, int age, String job) {
super(name, sex, age);
this.job = job;
}
public String toString(){
return "name:" + name + "\nsex:" + sex + "\nage:" + age + "\njob:" + job;
}
}
Main:import static java.lang.Math.random;public class Main{
public static void main(String args[]) {
Student student = new Student("Lily", "Female", 19, "Student");
Teacher teacher = new Teacher("John", "Male", 25, "Teacher");
Person[] person = { teacher, student };
double t = random(); if (t >= 0.0 && t < 0.5)
System.out.println(person[0]);
else
System.out.println(person[1]);
}
}
{
public J_teacher() //有return方法必须有返回类型
{
super("John","Male",25,"Teacher");
J_teacher b=new J_teacher();
J_person d=b; //你这个赋值我看不太懂
}
return(d);
}
本人初学者·~希望没有误导你
{
public J_student()
{
super("Lily","Female",19,"Student");
{
J_student a=new J_student();
J_person c=a;
return(c); //c是一个实例
} }
public class J_teacher extends J_person
{
public J_teacher()
{
super("John","Male",25,"Teacher");
J_teacher b=new J_teacher();
J_person d=b;
}
return(d); //d是一个实例
} 个人观点:你的return方法都返回的是一个实例~~~可以这样用吗??是不是语法错误??
~希望有高人可以指点
/**
*
*//**
* @author liusk
*
*/
public class PersonTest { /**
* @param args
*/
public static void main(String[] args) {
student student = new student("Lily", "Female", 19, "Student");
teacher teacher = new teacher("John", "Male", 25, "Teacher");
Person[] person = { teacher, student };
double t = random(); if (t >= 0.0 && t < 0.5) {
System.out.println(person[0]);
}
else{
System.out.println(person[1]);
}
}}
/**
*
*//**
* @author liusk
*
*/
public class Person {
public String name;
public String sex;
public String age;
public String job;
/**
* @return age
*/
public String getAge() {
return age;
}
/**
* @param age 設定する age
*/
public void setAge(String age) {
this.age = age;
}
/**
* @return job
*/
public String getJob() {
return job;
}
/**
* @param job 設定する job
*/
public void setJob(String job) {
this.job = job;
}
/**
* @return name
*/
public String getName() {
return name;
}
/**
* @param name 設定する name
*/
public void setName(String name) {
this.name = name;
}
/**
* @return sex
*/
public String getSex() {
return sex;
}
/**
* @param sex 設定する sex
*/
public void setSex(String sex) {
this.sex = sex;
}}/**
*
*//**
* @author liusk
*
*/
public class student extends Person{
public String job; public student(String name, String sex, int age, String job) {
this.name = super.getName();
this.sex = super.getSex();
this.age = super.getAge();
this.job = job;
}
public String toString(){
return "name:" + name + "\nsex:" + sex + "\nage:" + age + "\njob:" + job;
}
}
/**
*
*//**
* @author liusk
*
*/
public class teacher extends Person{ private String job; public teacher(String name, String sex, int age, String job) {
this.name = super.getName();
this.sex = super.getSex();
this.age = super.getAge();
this.job = job;
}
public String toString(){
return "name:" + name + "\nsex:" + sex + "\nage:" + age + "\njob:" + job;
}}
{
private String name;
private String sex;
private int age;
private String job;
public Person(){}
public Person(String name,String sex,int age,String job)
{
this.name=name;
this.sex=sex;
this.age=age;
this.job=job;
}
public String getName()
{
return name;
}
public String getSex()
{
return sex;
}
public int getAge()
{
return age;
}
public String getJob()
{
return job;
}
public String toString()
{
return ("姓名:"+name+" 性别:"+sex+" 年龄:"+age+" 职业:"+job);
}
}
class Student extends Person
{
public Student(){}
public Student(String name,String sex,int age)
{
super(name,sex,age,"学生");
}
}
class Teacher extends Person
{
public Teacher(){}
public Teacher(String name,String sex,int age)
{
super(name,sex,age,"老师");
}
}
public class Test
{
public static void main(String args[])
{
Person p[]=new Person[2];
p[0]=new Student("王明","男",23);
p[1]=new Teacher("大王","女",45);
for(int i=0;i<p.length;i++)
{
System.out.println(p[i]);
}
}
}
你可以把前三个类的public修饰符去掉,把这 三个类的定义都放到J_a 这个类文件里面去测试:public class J_person {
private String m_name;
private String m_sex;
private int m_age;
private String m_job; public J_person(String name, String sex, int age, String job) {
m_name = name;
m_sex = sex;
m_age = age;
m_job = job;
} public void setM_age(int m_age) {
this.m_age = m_age;
} public void setM_job(String m_job) {
this.m_job = m_job;
} public String getM_name() {
return m_name;
} public String getM_sex() {
return m_sex;
}
public String toString(){
String str="姓名:"+m_name+"\n姓别:"+m_sex+"\n年龄:"+m_age+"\n职业:"+m_job;
return str;
}
}
public class J_student extends J_person {
public J_student() {
super("Lily", "Female", 19, "Student");
}
}
public class J_teacher extends J_person {
public J_teacher() {
super("John", "Male", 25, "Teacher");
}
}
import static java.lang.Math.random;public class J_a {
public static double getnum() {
double t;
t = random();
return (t);
} public static void main(String args[]) {
J_person[] person = new J_person[2];
person[0] = new J_student();
person[1] = new J_teacher(); double t = getnum(); if (t >= 0.0 && t < 0.5)
System.out.println(person[0]);
else
System.out.println(person[1]);
}
}
变量都是a,b,c的单字母风格颇有google之风啊!