CUMT-----Java课后第三章编程作业

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一、题1

1.1 题目描述

1.2 代码块

public class Book {private String name;private int pages;public String getname(){return name;}public void setname(String name){this.name=name;}public int getPages() {return pages;}public void setPages(int pages) {this.pages = pages;}public Book(){}public Book(String name,int pages){this.name = name;this.pages=pages;}
}

public class BookDemo {public static void main(String[] args) {Book book = new Book ("Java 8 基础应用与开发",339);System.out.println("这本书的名字是：" + book.getname());System.out.println("这本书的页码是：" + book.getPages());}
}

1.3 运行截图

二、题2

2.1 题目描述

2.2 代码块

public class Point {private double x;private double y;public double getX() {return x;}public double getY() {return y;}public void setX(double x) {this.x = x;}public void setY(double y) {this.y = y;}
}

import java.util.Scanner;
import static java.lang.Math.*;public class PointDemo {public static void main(String[] args){Scanner sc = new Scanner(System.in);System.out.println("请输入第一个点：");double x1 = sc.nextDouble();double y1 = sc.nextDouble();Point p1 = new Point();p1.setX(x1);p1.setY(y1);System.out.println("请输入第二个点：");double x2 = sc.nextDouble();double y2 = sc.nextDouble();Point p2 = new Point();p1.setX(x2);p1.setY(y2);double ans1 = (Math.pow(p1.getX(),2)- Math.pow(p2.getX(),2))+(Math.pow(p1.getY(),2)- Math.pow(p2.getY(),2));double ans2 = Math.sqrt(ans1);double ans3 = Math.abs(ans2);System.out.println("两点距离是："+ans3);}
}

2.3 运行截图

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