java实验程序

class Person {

public String name; public char sex; public int age;

public Person(String name,char sex,int age) {

this.name=name; this.sex=sex; this.age=age; } }

class Student extends Person {

public String sno; public String classno;

public void updateAge (int age) {

this.age=age ; }

public String toString() {

System.out.println(\"姓名:\"+name+ \" 性别:\"+sex + \" 年龄:\"+age+

\" 学号:\"+sno+ \" 班级:\"+classno+\" \");

return \"Name:\"+name+ \"Sex:\"+sex + \"Age:\"+age+ \"Sno:\"+sno+ \"Classno:\"+classno+\" \"; }

Student(String name,char sex,int age,String sno,String classno) {

super(name,sex,age); this.sno=sno;

this.classno=classno; } }

public class TestStudent {

public static void main(String args[]) {

Student a[]=new Student [4];

a[0]=new Student(\"周攀\",'男',20,\"201012135055\",\"1002\"); a[1]=new Student(\"徐炎\",'男',19,\"201012135068\",\"1002\"); a[2]=new Student(\"嘉炬\",'男',20,\"201012135071\",\"1002\");

a[3]=new Student(\"刘孟薇\",'男',19,\"201012135081\",\"1002\"); for(int i=0;i<4;i++) {

a[i].toString(); } } }

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

源程序如下：

class Circle extends Shape {

void draw(){System.out.println(\"Draw Circle\");} }

class Line extends Shape {

void draw(){System.out.println(\"Draw Line\");} }

class Shape {

void draw() {

System.out.println(\"Shape Drawing\"); } }

public class TestVirtualInvoke {

static void doStuff(Shape s) {

s.draw(); }

public static void main(String args[]){ Circle c = new Circle(); Triangle t = new Triangle(); Line l = new Line(); doStuff(c); doStuff(t); doStuff(l); } }

class Triangle extends Shape {

void draw(){System.out.println(\"Draw Triangle\");} }

用抽象类：

class Circle extends Shape{

void draw(){System.out.println(\"Draw Circle\");} }

class Line extends Shape{

void draw(){System.out.println(\"Draw Line\");} }

abstract class Shape{ abstract void draw(); }

public class TestVirtualInvoke{

public static void main(String args[]){ Shape c = new Circle(); Shape t = new Triangle(); Shape l = new Line(); c.draw(); t.draw(); l.draw(); } }

class Triangle extends Shape{

void draw(){System.out.println(\"Draw Triangle\");} }

用接口：

class Circle implements Shape{ public void draw(){

System.out.println(\"Draw Circle\"); } }

class Line implements Shape {

public void draw(){

System.out.println(\"Draw Line\"); } }

public interface Shape { }

public class TestVirtualInvoke{

public static void main(String args[]){ Shape c = new Circle(); Shape t = new Triangle(); Shape l = new Line(); c.draw();

public void draw();

t.draw(); l.draw(); } }

class Triangle implements Shape{ public void draw(){

System.out.println(\"Draw Triangle\"); } }

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 源程序如下：

/*抽象员工类*/

public abstract class Person {

private static int personNO;//员工编号 static{

personNO=1000;//初始化员工编号 }

private String name; private int wage;

public void setWage(int wage) { this.wage = wage; }

public Person(String name) {

this.name=name; personNO++; }

public abstract int getPay();//将工资计算方法定义为抽象的，具体实现在子类中

public String toString() {

System.out.println(\"****公司员工基本信息*****\");

return \"员工姓名:\"+name+\"\\n员工编号:\"+personNO+\"\\n月薪水:\"+wage; } }

/*经理类*/

public class Manerger extends Person{

public Manerger(String name) {

super(name);

System.out.println(\"经理创建成功\");

}

public int getPay() { super.setWage(8000); return 8000; } }

/*技术员类*/

public class TechPerson extends Person{

private int hours;//当月的工作时（以小时计数） public TechPerson(String name,int hours) {

super(name); this.hours=hours;

System.out.println(\"技术员创建成功\"); }

public int getPay() {

super.setWage(100*hours); return 100*hours; } }

public class Salesman extends Person{

private int saleSum;//销售总额 private float wagePercent;//提成比例

public Salesman(String name,int saleSum,float wagePercent) { super(name);

this.saleSum=saleSum;

this.wagePercent=wagePercent; System.out.println(\"销售员创建成功\"); }

public int getPay() { int temp;

temp=(int)(this.wagePercent*this.saleSum); super.setWage(temp); return temp; } }

/*测试类*/

public class Test {

/**测试公司所有员工类 * @param args */

public static void main(String[] args) {

Manerger manergerOne=new Manerger(\"嘉炬\"); TechPerson techOne=new TechPerson(\"王丽\ Salesman saleOne=new Salesman(\"廖小明\

//调用getWage()方法

int manergeWage=manergerOne.getPay(); int techWage=techOne.getPay(); int saleWage=saleOne.getPay();

System.out.println(\"经理月薪:\"+manergeWage+\"技术员月薪:\"+techWage+\"销售员月薪:\"+saleWage);

//打印员工具体信息

System.out.println(manergerOne.toString()); System.out.println(techOne.toString()); System.out.println(saleOne.toString()); }

}