java定义一个测试类 java写一个类并测试它

《Java程序设计》实验5

1、定义一个表示圆的Circle类，其中有表示半径的double型的属性radius，计算圆周长的perimeter方法和计算面积的area方法。在Circle类的基础上，定义圆柱体Cylinder类和球体Sphere类，它们分别具备计算表面积的area方法和体积的volume方法，编写测试类进行测试。

package homework.test;
public class Circle {
	double radius;
	public Circle(double radius) {
		this.radius = radius;
	}
	public double perimeter() {
		return 2 * 3.14 * radius;
	}
	public double area() {
		return 3.14 * radius * radius;
	}
	public double getRadius() {
		return radius;
	}
	public void setRadius(double radius) {
		this.radius = radius;
	}
}
package homework.test;
public class Cylinder extends Circle {
	double height;
	public Cylinder(double radius,double height) {
		super(radius);
		this.height = height;
	}
	void areaCy() {
		double a = 2 * (3.14 * radius * radius) + (2 * 3.14 * radius) * height;
		System.out.println("圆柱体表面积为："+a);
	}
	void volumeCy() {
		double v = super.area() * height;
		System.out.println("圆柱体体积为："+v);
	}
	public double getHeight() {
		return height;
	}
	public void setHeight(double height) {
		this.height = height;
	}
}
package homework.test;
public class Sphere extends Circle {
	public Sphere(double radius) {
		super(radius);
	}
	void areaS() {
		double a = 4 * 3.14 * radius * radius;
		System.out.println("该球体表面积为："+a);
	}
	void volumeS() {
		double v = (4.0 / 3) * 3.14 * radius * radius * radius;
		System.out.println("该球体体积为："+v);
	}
}
package homework.test;
public class CylinderSphereTest {
	public static void main(String[] args) {
		Cylinder cy = new Cylinder(2,3);
		cy.areaCy();
		cy.volumeCy();
		Sphere s = new Sphere(3);
		s.areaS();
		s.volumeS();
	}
}

2、编写程序，模拟某网站在线人数场景。 比如，张三登录系统后，输出：张三上线了，目前在线人数为4，李四下线了，目前在线人数为3。

package homework.test;
public class WebSystem {
	String name;
	int number;
	public void number1() {
		number = 3;
		number++;
		System.out.println("目前在线人数为"+number+"人");
	}
	public void number2() {
		number--;
		System.out.println("目前在线人数为"+number+"人");
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getNumber() {
		return number;
	}
	public void setNumber(int number) {
		this.number = number;
	}
}
package homework.test;
import java.util.Scanner;
public class WebSystemTest {
	public static void main(String[] args) {
		WebSystem ws = new WebSystem();
		while (true) {
			System.out.println("登陆系统");
			System.out.println("请输入您的名称：");
			Scanner sc = new Scanner(System.in);
			String s = sc.nextLine();
			
			ws.number1();
			System.out.println("1.继续在线\t2.下线");
			System.out.println("请选择您需要的操作对应的数字1-2：");
			int choice = sc.nextInt();
			
			switch(choice) {
			case 1:
				break;
			case 2:
				ws.number2();
				break;
			}
		}
	}
}

3、编写程序，模拟城市天气预报。从控制台输入若干个城市的天气数据，并在控制台打印输出。比如：城市：北京，天气状况：晴，最高温度：20摄氏度，最低温度：8摄氏度，风向：西北风，风力：3级。

package homework.test;

public class WeatherPrediction {
	private String city;
	private String condition;
	private String MAX_temperature;
	private String MIN_temperature;
	private String wind_direction;
	private String wind_power;
	
	
	public WeatherPrediction(String city, String condition, String mAX_temperature, String mIN_temperature,
			String wind_direction, String wind_power) {
		super();
		this.city = city;
		this.condition = condition;
		this.MAX_temperature = mAX_temperature;
		this.MIN_temperature = mIN_temperature;
		this.wind_direction = wind_direction;
		this.wind_power = wind_power;
	}

	public String getCity() {
		return city;
	}
	public void setCity(String city) {
		this.city = city;
	}
	public String getCondition() {
		return condition;
	}
	public void setCondition(String condition) {
		this.condition = condition;
	}
	public String getMAX_temperature() {
		return MAX_temperature;
	}
	public void setMAX_temperature(String mAX_temperature) {
		MAX_temperature = mAX_temperature;
	}
	public String getMIN_temperature() {
		return MIN_temperature;
	}
	public void setMIN_temperature(String mIN_temperature) {
		MIN_temperature = mIN_temperature;
	}
	public String getWind_direction() {
		return wind_direction;
	}
	public void setWind_direction(String wind_direction) {
		this.wind_direction = wind_direction;
	}
	public String getWind_power() {
		return wind_power;
	}
	public void setWind_power(String wind_power) {
		this.wind_power = wind_power;
	}
	void show() {
		System.out.println("城市："+city);
		System.out.println("天气情况："+condition);
		System.out.println("最高温度："+MAX_temperature);
		System.out.println("最低温度："+MIN_temperature);
		System.out.println("风向："+wind_direction);
		System.out.println("风力："+wind_power);
	}
	
}
package homework.test;

public class WeatherPredictionTest {
	public static void main(String[] args) {
		WeatherPrediction w = new WeatherPrediction("北京","晴","20摄氏度","8摄氏度","西北风","3级");
		w.show();
		
	}
}

4、编写一个银行账户类，类的构成包括： （1）数据成员：用户的账号名称、用户的账户余额；
（2）方法包括：开户（设置账户名称及余额），利用构造方法完成； （3）查询余额。

package homework.test;
public class Account {
	private String name;
	private double money;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public double getMoney() {
		return money;
	}
	public void create(String name) {
		this.name = name;
		System.out.println("您创建的账号名称是："+name);
	}
	public void setMoney(double money) {
		this.money = money;
	}
	public void deposit(int a) {
		this.money += a;
		System.out.println("您存入了"+a+"元。");
	}
	public void withdraw(int b) {
		this.money -= b;
		System.out.println("您取出了"+b+"元。");
	}
	public void getBalance() {
		System.out.println("当前您的余额为："+money+"元。");
	}
	
	public static void main(String[] args) {
		Account a = new Account();
		a.create("张三");
		a.deposit(100);
		a.withdraw(50);
		a.getBalance();
	}
}