自我体重诊断java程序

package com.tzcs; import java.io.InputStreamReader; import java.io.BufferedReader; import java.io.IOException; public class WeightDiagnosis { // 用静态方法声明初始化参数 private static final double MAXHEIGHT=3.0;//身高最大值 private static final double MINHEIGHT=0.5;//身高最小值 private static final double MAXWEIGHT=200.0;//体重最大值 private static final double MINWEIGHT=20.0;//体重最小值 private static final String USERNAME="Admin"; //登陆的用户名Admin private static final String PASSWORD="123"; //登陆的密码123 // 定一个输入流 InputStreamReader in = new InputStreamReader(System.in); //定一个阅读器把输入流句装到阅读器中 BufferedReader rd = new BufferedReader(in); //登陆系统 public void Landing() { String UserName=null; String PassWord=null; for(int i=0;i<3;i++) { try { System.out.println("请输入用户名！"); UserName=rd.readLine(); System.out.println("请输入用户密码！"); PassWord=rd.readLine(); } catch(IOException e) { e.printStackTrace(); } if(UserName.equals(USERNAME)&& PassWord.equals(PASSWORD)) { System.out.println("登陆成功！"); break; } else if(i==2) { System.out.println("你输入错误超过三次,系统自动退出"); System.exit(0); } else { System.out.println("你输入的用户名或密码错误,您还有"+(2-i)+"次机会,请重新输入.."); } } } //系统诊断 public void Diagnose() { String chooser=null; System.out.println("是否开始自我诊断？请输入功能键："); while(true) { switch(0) { case 0 : System.out.print("1.开始诊断"); case 1 : System.out.println("2.退出诊断"); try { chooser = String.valueOf(rd.readLine());//输入字符强制转换为String } catch(IOException e) { e.printStackTrace(); } } if(chooser.equals("1")) { break; } else if(chooser.equals("2")) { System.out.println("退出诊断，谢谢使用！"); System.exit(0); } else { System.out.println("你的选择无效!,请重新选择："); } } } //判断体重 public void weight() { String chooser=null; // 定义初始化身高 float Height = 0.0f; //定义初始化体重 float Kg = 0.0f; while(true) { try { //在屏幕上提示用户输入身高 System.out.println("请输入身高（范围在0.5-3.0（m））："); Height = Float.parseFloat(rd.readLine()); System.out.println("请输入体重（范围在2-200（kg））："); Kg = Float.parseFloat(rd.readLine()); } catch(IOException e) { e.printStackTrace(); } if(Height>=MAXHEIGHT || Height<=MINHEIGHT) { System.out.println("你输入的范围无效，请重新输入："); continue; } else if(Kg>=MAXWEIGHT || Kg<=MINWEIGHT) { System.out.println("你输入的范围无效，请重新输入："); continue; } float result = Kg / (Height * Height); //判断结果 String strShow = "测试结果："; if (result < 18) { strShow = "偏瘦"; } else if (result >= 18 && result <= 25) { strShow = "体重标准"; } else if (result >25 && result <= 30) { strShow = "体重偏胖"; } else if (result >30 && result <= 35) { strShow = "中度偏胖"; } else if (result >35) { strShow = "重度肥胖"; } else { System.out.println("你的输入无效,请新输入"); continue; } System.out.println(strShow); break; } System.out.println("是否还要进行测试？请输入功能键："); while(true) { switch(0) { case 0 : System.out.print("1.开始测试"); case 1 : System.out.println("2.退出测试"); try { chooser = String.valueOf(rd.readLine()); } catch(IOException e) { e.printStackTrace(); } } if(chooser.equals("1")) { break; } else if(chooser.equals("2")) { System.out.println("退出测试，谢谢使用！"); System.exit(0); } else { System.out.println("你的选择无效!,请重新选择："); } } weight(); } public static void main(String[] args) { WeightDiagnosis wd = new WeightDiagnosis(); wd.Landing(); wd.Diagnose(); wd.weight(); } }