「java优雅if」java优雅停机

博主:adminadmin 2022-12-23 23:27:12 57

本篇文章给大家谈谈java优雅if,以及java优雅停机对应的知识点,希望对各位有所帮助,不要忘了收藏本站喔。

本文目录一览:

Java If语句

看我写的注解部位,多了两个分号,现在程序可正常运行。

package test1;

import java.util.*;

public class A3T1 {

public static void main(String[] args)

{

String Package;

double hours;

double purchase;

//Create a Scanner object to read input

Scanner keyboard=new Scanner(System.in);

//Get the package which customers choice

System.out.print("Choice Package:");

Package = keyboard.nextLine();

//Get the hours that customers use

System.out.print("Enter hours of use:");

hours=keyboard.nextDouble();

//If customers choice PackageA, they should pay how much according to the hours of use

if(Package.equalsIgnoreCase("A"))

{

if(hours=10)

{purchase = 9.95;}

else

{purchase = 9.95 + 2*( hours - 10);}

System.out.println("$"+purchase);

}

//If customers choice PackageB, they should pay how much according to the hours of use

else if(Package.equalsIgnoreCase("B"))//这个位置你多了一个“;”

{

if(hours=20)

{purchase = 13.95;}

else

{purchase = 13.95+(hours-20)*1;}

System.out.println("$"+purchase);

}

//If customers choice PackageC, they should pay how much according to the hours of use

else if (Package.equalsIgnoreCase("C"))//这个位置你也多了一个“;”

{

purchase = 19.95;

System.out.println("$"+purchase);}

//it the users enters the other package letter except for A,B ,or C

else

System.out.println( "Invalid Package.Please Enter A, B,or C.");

}

}

JAVA if语句

if ("123".equals(username)"123".equals(password)){

request.setAttribute("username",username);

return mapping.findForward("LogSuccess");

}else if 你的条件那?很明确的这里有错!

request.setAttribute("password",password);

{

return mapping.findForward("LogFail");

}

else{

return mapping.findForward("Register");

}

你是想完成一个登陆:

if ("123".equals(username)"123".equals(password)){

request.setAttribute("username",username);

return mapping.findForward("LogSuccess");

}else if(!("123".equals(username)){//用户名错误

return mapping.findForward("Register");

}else{//密码错误

return mapping.findForward("LogFail");

}

java中的if语句的所有用法

(1)多个条件同时成立时才执行if:

if(条件1条件2条件3条件4条件5..............){

}

(2)多个条件,只有一个成立便执行if:

if(条件1||条件2||条件3||条件4||条件5||..............){

}

Java if语句

boolean s = year%4==0;

boolean a = year%100!=0;

booelan b = year%400==0;

if(s a || b){

................

}

关于java中的if语句

boolean是指布尔型的值,对于number10这个表达式,假设number=9,那么number10对应的布尔值就是true,假设number=11,那么number10对应的布尔值就是false,也就是说if后面的括号里只要是个布尔值就行,举个例子,说明两者的共同之处

if(number10){...}

等价于

boolean b;

b=number10;

if(b){...}

不明白的话继续问

java使用if语句怎么做

String sexd="男"

if(sexd.equals("男"))

{

if(areab.equals("深圳"))

{

if(t.equals("好人"))

{

System.out.println("给他300块");

}

else if(t.equals("坏人"))

{

System.out.println("罚他300块");

}

}

else if(areab.equals("永州"))

{

if(t.equals("好人"))

{

System.out.println("给他3万块");

}

else if(t.equals("坏人"))

{

System.out.println("罚他3万块");

}

}

}

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发布于:2022-12-23,除非注明,否则均为首码项目网原创文章,转载请注明出处。