Java作业大全

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• Java作业答案大全（持续更新ing）

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Java作业答案大全（持续更新ing）

试题（1）

import java.util.Scanner;

public class Main {
	
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		double futureInvestmentValue,investmentAmount,monthlyInterestRate,numOfYears;
		investmentAmount = sc.nextDouble();
		monthlyInterestRate = sc.nextDouble() / (100 * 12);
		numOfYears = sc.nextDouble();
		double temp1 = 1 + monthlyInterestRate;
		double temp2 = numOfYears*12;
		futureInvestmentValue = investmentAmount * Math.pow(temp1 ,temp2);
		futureInvestmentValue = (int)(futureInvestmentValue * 100) / 100.0;
		System.out.println(futureInvestmentValue);
	}

}

试题（2）

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		double x , y;
		x = sc.nextDouble();
		y = sc.nextDouble();
		x = Math.abs(x);
		y = Math.abs(y);
		x = (int)(x * 10) / 10.0;
		y = (int)(y * 10) / 10.0;
		if((x < 5 || x == 5 )&&( y <2.5 || y == 2.5) ) {
			System.out.println("Point ("+ x + ", " + y + ") is in the rectangle");
		}else {
			System.out.println("Point ("+ x + ", " + y + ") is not in the rectangle");
		}
	}

}

试题（3）

import java.util.Scanner;

public class LockerQue {
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int stuNum = sc.nextInt();
		boolean[] lockers = new boolean[stuNum];
		for (int j = 1; j <= stuNum; j++) {
		      for (int i = j - 1; i < stuNum; i += j) {
		        lockers[i] = !lockers[i];
		      }
		}
		for (int i = 0; i < stuNum; i++) {
			if(lockers[i]) {
				System.out.println("Locker " + (i + 1) + " is open");
			}
		}
	}

	

}

试题（4）

这题做了9.90/10.0，做到10.0的dl务必私聊教我www。

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		long cardId = sc.nextLong();
		long c1 = cardId / 10;
		int sum1 = 0 , sum2 = 0;
		long temp = 0;
		while(c1 > 0) {
			temp = 2*(c1 % 10);
			if(temp >= 10) {
				temp = temp%10 + temp/10;
			}
			sum1 += temp;
			c1 /= 100;
		}
		c1 = cardId;
		while(c1 > 0) {
			temp = c1 % 10;
			sum2 += temp;
			c1 /= 100;
		}
		int sum = sum1 + sum2;
		if(sum % 10 == 0) {
			System.out.println(cardId + " is valid");
		}else {
			System.out.println(cardId + " is invalid");
		}
	}

}

试题（5）

public class Bod {

	private int age;
	private String name;
	public Bod(String name , int age) {
		this.age = age;
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public void growOlder(int nYear) {
		this.age += nYear;
	}
	
	public static void main(String[] args) {
		Bod bod = new Bod("James", 23);
		System.out.println(bod.getName() + " " + bod.getAge());
		bod.growOlder(13);
		System.out.println(bod.getName() + " " + bod.getAge());
	}
}

试题（6）

public class Product {
	
	private String code;
	private String decription;
	private double price;
	
	public String getCode() {
		return code;
	}

	public void setCode(String code) {
		this.code = code;
	}

	public String getDecription() {
		return decription;
	}

	public void setDecription(String decription) {
		this.decription = decription;
	}

	public double getPrice() {
		return price;
	}

	public void setPrice(double price) {
		this.price = price;
	}

	public static void main(String[] args) {
		Product p = new Product();
		p.setCode("PP20201011");
		p.setDecription("good");
		p.setPrice(199.98);
		System.out.println(p.getCode() + " " + p.getDecription()+ " " + p.getPrice());
	}
	
}

试题（7）

public class Box {
	
	private double length = 3.0;
	private static double width = 4.0;
	private static double height = 5.0;
	
	public Box() {
		
	}
	
	public Box(double length, double width, double height) {
		this.length = length;
		this.width = width;
		this.height = height;
	}


	public double getLength() {
		return length;
	}


	public void setLength(double length) {
		this.length = length;
	}


	public static double getWidth() {
		return width;
	}


	public static void setWidth(double width) {
		Box.width = width;
	}


	public static double getHeight() {
		return height;
	}


	public static void setHeight(double height) {
		Box.height = height;
	}

	public double getVolume() {
		double volume = (int)(length * width * height * 10) / 10.0;
		return volume;
	}
	
	public static void main(String[] args) {
		Box b = new Box();
		System.out.println(b.getLength()+" "+getWidth()+" "+getHeight());
		System.out.println(b.getVolume());
	}
	
}

试题（8）

public class Rectangle {
	
	private double length ;
	private double width ;
	
	public double getLength() {
		return length;
	}

	public void setLength(double length) {
		this.length = length;
	}

	public double getWidth() {
		return width;
	}

	public void setWidth(double width) {
		this.width = width;
	}

	public double getArea() {
		double area = (int)(length * width * 10) / 10.0;
		return area;
	}
	
	public double getPerimeter() {
		double perimeter = (int)(2*(length + width) *10) / 10.0;
		return perimeter;
	}

	public static void main(String[] args) {
		Rectangle r = new Rectangle();
		r.setLength(5.0);
		r.setWidth(6.0);
		System.out.println(r.getLength()+" "+r.getWidth());
		System.out.println(r.getArea()+ " "+ r.getPerimeter());
	}
	
}

试题（9）