看你题号前有个1,第二题呢?
本题答案:
public class Person {
private String name;
private String sex;
private int age;
public String getName() {
return name;
}
public String getSex() {
return sex;
}
public int getAge() {
return age;
}
public Person(String name, String sex, int age) {
super();
this.name = name;
this.sex = sex;
this.age = age;
}
}
————————————————————————————————
public class Student extends Person{
private int num;
private int grade;
private String job;
public Student(String name, String sex, int age, int num, int grade,
String job) {
super(name,sex,age);
this.num = num;
this.grade = grade;
this.job = job;
}
public int getNum() {
return num;
}
public int getGrade() {
return grade;
}
public String getJob() {
return job;
}
}
——————————————————————————————
public class PStudent {
public static void main(String[] args) {
Student s1=new Student("成龙","male",18,1002,3,"影视");
System.out.println("姓名:"+s1.getName());
System.out.println("性别:"+s1.getSex());
System.out.println("年龄:"+s1.getAge());
System.out.println("学号:"+s1.getNum());
System.out.println("年级:"+s1.getGrade());
System.out.println("专业:"+s1.getJob());
}
}
结果:姓名:成龙
性别:male
年龄:18
学号:1002
年级:3
专业:影视
public class Person{
String name;
String sex;
int age;
}
public class Student extends Person{
String sid;
String grade;
String subject;
}
public class PStudent{
public static void main(String[] args) {
Student stu = new Student();
System.out.println("学号----"+stu.sid);
System.out.println("姓名----"+stu.name);
System.out.println("性别----"+stu.sex);
System.out.println("年龄----"+stu.age);
System.out.println("年级----"+stu.grade);
System.out.println("专业----"+stu.subject);
}
}
class Person{
String name="XXX";
String sex="男";
int age=00;
public void go1(){
}
}
class student extends Person{
int num=9090950;
int gr=1;
String spe="软件";
public void go2(){
}
}
public class PStudent{
public static void main(String args[]){
System.out.println("学号:"+new student().num);
System.out.println("姓名:"+new student().name);
System.out.println("性别:"+new student().sex);
System.out.println("年龄:"+new student().age);
System.out.println("年级:"+new student().gr);
System.out.println("专业:"+new student().spe);
}
}