java0614-homework

java0614-homework

1 定义狗类

题目
定义狗类
属性：昵称，品种，健康值（int）
方法：吃，玩飞盘
定义测试类 实例化对象，调用方法

代码

//HomeDog类
public class HomeDog {
	String name;
	String breed;
	int health;
	
	public void eat() {
		System.out.println(this.health
		+"健康值的"+this.breed
		+this.name+"在吃狗粮");
	}
	
	public void play() {
		System.out.println(this.name+"玩飞盘");
	}
}

//测试
public class TestHomeDog {
	public static void main(String[] args) {
		HomeDog dog = new HomeDog();
		dog.name = "柯基";
		dog.breed = "纯种";
		dog.health = 100;
		
		dog.eat();
		dog.play();
	}
}

结果

2 求矩形面积

题目
定义矩形类
属性：宽、高
方法：计算周长、面积（返回结果）
定义测试类：实例化两个矩形对象，求出周长和面积

代码

//Rectangle类
public class Rectangle {
	int height;
	int weight;
	
	public int getPerimeter() {
		int perimeter = 0;
		perimeter = 2*(height+weight);
		return perimeter;
	}
	
	public int getArea() {
		int area = 0;
		area = height*weight;
		return area;
	}
}

//测试
public class TestRectangle {
	public static void main(String[] args) {
		//实例化一
		Rectangle rec1 = new Rectangle();
		rec1.height = 56;
		rec1.weight = 48;
		System.out.println(rec1.getPerimeter()+"m");
		System.out.println(rec1.getArea()+"m^2");
		
		//实例化二
		Rectangle rec2 = new Rectangle();
		rec2.height = 89;
		rec2.weight = 67;
		System.out.println(rec2.getPerimeter()+"m");
		System.out.println(rec2.getArea()+"m^2");
	}
}

结果

3 实现级联菜单

题目
一级菜单

*******欢迎进入银行系统*********
1、注册
2、登录
3、退出
*******************************
请选择：2

二级菜单

*******************************
1、查询余额
2、存款
3、取款
*******************************
请选择（输入0返回上一级）：

代码

//Menu类
public class Menu {
	public void menu1(){
		Scanner input = new Scanner(System.in);
		
		
		do {
			System.out.println("*****欢迎进入银行系统*****");
			System.out.println("\t1、注册");
			System.out.println("\t2、登陆");
			System.out.println("\t3、退出");
			System.out.println("**************************");
			System.out.print("请选择：");

			int select = input.nextInt();
			
			switch(select) {
			case 1:
				System.out.println("注册");
				break;
			case 2:
				System.out.println("登陆");
				menu2();
				break;
			case 3:
				System.out.println("退出");
				break;
			}
		}while(true);
	}
	
	public void menu2() {
		Scanner input = new Scanner(System.in);
		
		do {
			System.out.println("*****欢迎进入银行系统*****");
			System.out.println("\t1、查询余额");
			System.out.println("\t2、存款");
			System.out.println("\t3、取款");
			System.out.println("**************************");
			System.out.print("请选择（输入0返回上一级）：");

			int select = input.nextInt();
			
			switch(select) {
			case 1:
				System.out.println("查询余额");
				break;
			case 2:
				System.out.println("存款");
				break;
			case 3:
				System.out.println("取款");
				break;
			default:
				menu1();
				break;
			}
		}while(true);
	}
}

//测试
public class TestMenu {
	public static void main(String[] args) {
		Menu m1 = new Menu();
		m1.menu1();
	}
}

结果

4 模拟计算器

题目
定义一个计算器，实现两个数的加减乘除

代码

//Calculator01类
public class Calculator01 {
	int num1;
	int num2;
	
	public int add() {
		int sum = num1+num2;
		return sum;
	}
	
	public int subtract() {
		int sum = num1-num2;
		return sum;
	}
	
	public int mul() {
		int sum = num1*num2;
		return sum;
	}
	
	public int division() {
		int sum = num1/num2;
		return sum;
	}
	
}

//测试
public class TestCalculator01 {
	public static void main(String[] args) {
		Calculator01 cal = new Calculator01();
		cal.num1 = 45;
		cal.num2 = 67;
		System.out.println(cal.num1+"+"+cal.num2+"="+cal.add());
		System.out.println(cal.num1+"/"+cal.num2+"="+cal.division());
		System.out.println(cal.num1+"*"+cal.num2+"="+cal.mul());
		System.out.println(cal.num1+"-"+cal.num2+"="+cal.subtract());
	}
}

结果

5 用户登录

题目
账户类
属性：用户名、密码
方法：登陆验证，要求返回验证结果
正确账号信息为admin/123456

代码

//Login类
import java.util.Scanner;
public class Login {
	String user = "admin";
	String passward = "123456";
	String userInput;
	String passwardInput;
	
	public boolean getLogin() {
		Scanner input = new Scanner(System.in);
		System.out.print("请输入用户名：");
		userInput = input.next();
		System.out.print("请输入密码：");
		passwardInput = input.next();
		
		if(user.equals(userInput)&&passward.equals(passwardInput)) {
			System.out.println("登陆成功");
			return true;
		}else {
			System.out.println("账号或密码错误");
			return false;
		}
	}
	
}

//测试
public class TestLogin {
	public static void main(String[] args) {
		Login log = new Login();
		
		System.out.println(log.getLogin());
	}
}

结果