JAVA例8.1-8.15及实验32-38概述.docx

14网2第12组第七周上机报告 例8.1 //filename:App8_1.java class Person { private String name; private int age; public Person() { System.out.println(调用了个人类的构造方法Person()); } public void setNameAge(String name,int age) { this.name=name; this.age=age; } public void show() { System.out.println(姓名：+name+ ?年龄：+age); } } class Student extends Person { private String department; public Student() { System.out.println(调用了学生类的构造方法Student()); } public void setDepartment(String dep) { department=dep; System.out.println(我是+department+的学生); } } public class App8_1 { public static void main(String[] args) { Student stu=new Student(); stu.setNameAge(张小三,21); stu.show(); stu.setDepartment(计算机系); } } 例8.2 //filename:App8_2.java class Person { private String name; private int age; public Person() { System.out.println(调用了Person类的无参构造方法); } public Person(String name,int age) { System.out.println(调用了Person类的有参构造方法); this.name=name; this.age=age; } public void show() { System.out.println(姓名：+name+ ?年龄：+age); } } class Student extends Person { private String department; public Student() { System.out.println(调用了学生类的无参构造方法Student()); } public Student(String name,int age,String dep) { super(name,age); department=dep; System.out.println(我是+department+的学生); System.out.println(调用了学生类的有参构造方法Student(String name,int age,String dep)); } } public class App8_2 { public static void main(String[] args) { Student stu1=new Student(); Student stu2=new Student(李小四,23,信息系); stu1.show(); stu2.show(); } } 例8.3 //filename:App8_3.java class Person { protected int age; public Person() {} ?//定义Person类的“不做事”的无参构造方法 public Person(String name,int age) { this.name=name; this.age=age; } protected void show() { System.out.println(姓名：+name+ ?年龄：+age); } } class Student extends Person { private String department; int age=20; public Student(String xm,String dep) { name=xm; department=dep; super.age=25; System.out.println(之类Studetn中的成员变量age=+age); super.show(); System.out.println(系别：+department); } } public class App8_3 { public static vo