java实验报告

实验一、集成环境及语言基础 一、实验目的：熟悉集成环境，通过一个简单的类来完成编码编译及运行的全过程。 二、实验要求： 熟悉Eclipse（或Jcreator等）集成环境的使用；学习Java程序的基本结构，类的定义及对象的创建；学习变量、达式、控制使用。 三、实验 1、 对editplus进行设置，配置用户工具。（使用Eclipse 可略） 2、 Write a static double calculateArea (String shape ,double radius, double width, double height) function which computes and returns the area of a shape based on the following criteria: 1. if the shape is  “circle”, the formula to calculate area is 3.14*radius*radius. 2. if the shape is “rectangle”, the formula to calculate area is width * height. 3. if the shape is “square”, the formula to calculate area is width * width. 4. if the shape is any other String value, the formula to calculate area is return -1. 3、 编写一个程序用以设置和输出员工属性，员工属性包括工号，姓名和工资（经理是一类特殊的员工，除了员工的基本属性另外还具有奖金）； 参考程序 计算面积 一、 import java.io.*; public class calculatearea1 { /** * @param args */ public static void main(String[] args)throws IOException { // TODO Auto-generated method stub BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); final double PI=3.14; String shape; double radius; double weight; double heigth; double area; shape=br.readLine(); if (shape.equals("circle")){ System.out.println("input radius："); radius=Double.parseDouble(br.readLine()); area=PI*radius*radius;  System.out.println("the area of circle is"+area); } else if(shape.equals("rectangle")){ System.out.println("input weight："); weight=Double.parseDouble(br.readLine()); System.out.println("input height："); heigth=Double.parseDouble(br.readLine()); area=weight*heigth;  System.out.println("the area of rectangle is"+area); } else if(shape.equals("squre")){ System.out.println("input wigth："); weight=Double.parseDouble(br.readLine()); area=weight*weight;  System.out.println("the area of rectangle is"+area); } else System.out.println("the input is wrong"); } } 二、import java.io.*; public class calculatearea2 { /** * @param args */ public void calculate()throws IOException{ BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); final double PI=3.14; String shape; double radius; double weight; double heigth; double area; shape=br.readLine(); if (shape.equals("circle")){ System.out.println("input radius："); radius=Double.parseDouble(br.readLine()); area=PI*radius*radius;  System.out.println("the area of circle is"+area); } else if(shape.equals("rectangle")){ System.out.println("input weight："); weight=Double.parseDouble(br.readLine()); System.out.println("input height："); heigth=Double.parseDouble(br.readLine()); area=weight*heigth;  System.out.println("the area of rectangle is"+area); } else if(shape.equals("squre")){ System.out.println("input wigth："); weight=Double.parseDouble(br.readLine()); area=weight*weight;  System.out.println("the area of rectangle is"+area); } else System.out.println("the input is wrong"); } public static void main(String[] args) { // TODO Auto-generated method stub calculatearea2 c=new calculatearea2(); try{ c.calculate(); } catch (Exception e){ System.out.println("there is an exception"); } finally { System.out.println("it must be excuted"); } } } 三、import java.util.*; public class calculatearea3 { /** * @param args */ public void calculate(){ Scanner sc=new Scanner(System.in); final double PI=3.14; String shape; double radius; double weight; double heigth; double area; shape=sc.next(); if (shape.equals("circle")){ System.out.println("input radius："); radius=sc.nextDouble(); area=PI*radius*radius;  System.out.println("the area of circle is"+area); } else if(shape.equals("rectangle")){ System.out.println("input weight："); weight=sc.nextDouble(); System.out.println("input height："); heigth=sc.nextDouble(); area=weight*heigth;  System.out.println("the area of rectangle is"+area); } else if(shape.equals("squre")){ System.out.println("input wigth："); weight=sc.nextDouble(); area=weight*weight;  System.out.println("the area of rectangle is"+area);