英文:
Is there anyway to shorten this Java code by validating name and weight using only one do...while?
问题
以下是您要翻译的内容：
有没有办法在一个 do while 循环中同时验证姓名（String）和重量（double）？如何添加可选的正则表达式，例如 [./ ]，除了 [a-zA-Z]+ 之外？
do {
System.out.print("姓名：");
name = input.nextLine();
if (Pattern.matches("[a-zA-Z]+", name)) {
isValid = true;
} else {
System.out.println("无效输入\n请重试\n");
isValid = false;
}
} while (!(isValid));
do {
System.out.print("身高（厘米）：");
input.nextLine();
if (input.hasNextDouble()) {
height = input.nextDouble();
if (height > 5 && height <= 500) {
isValid = true;
} else {
System.out.println("无效输入\n请重试\n");
isValid = false;
}
} else {
System.out.println("无效输入\n请重试\n");
isValid = false;
}
} while (!(isValid));
英文:
Is there any way to validate name(String) and weight(double) in only one do while?
How to add optional regex such as [./ ] besides [a-zA-Z]+ ?
do {
System.out.print("Name: ");
name = input.nextLine();
if (Pattern.matches("[a-zA-Z]+", name)) {
isValid = true;
} else {
System.out.println("Invalid input\nPlease try again\n");
isValid = false;
}
} while (!(isValid));
do {
System.out.print("Height(cm): ");
input.nextLine();
if (input.hasNextDouble()) {
height = input.nextDouble();
if (height > 5 && height <= 500) {
isValid = true;
} else {
System.out.println("Invalid input\nPlease try again\n");
isValid = false;
}
} else {
System.out.println("Invalid input\nPlease try again\n");
isValid = false;
}
} while (!(isValid));
答案1
得分: 1
你可以将可选的正则表达式 [./ ] 添加到相同的模式中，用 | 分隔开。可以像这样在单个 do-while 中执行验证：
import java.util.regex.*;
import java.util.*;
public class StackOverflow
{
public static void main(String[] args)
{
Boolean isNameValid = false, isHeightValid = false;
String name = null; double height = 0;
Scanner input = new Scanner(System.in);
Pattern pattern = Pattern.compile("[a-zA-Z]+|[./ ]");
do
{
if(!isNameValid)
{
System.out.print("Name: ");
name = input.nextLine();
Matcher match = pattern.matcher(name);
if (match.find())
isNameValid = true;
else
{
System.out.println("Invalid input\nPlease try again\n");
isNameValid = false;
}
}
if(isNameValid && !isHeightValid)
{
System.out.print("Height(cm): ");
if (input.hasNextDouble())
{
height = input.nextDouble();
if (height > 5 && height <= 500)
isHeightValid = true;
else
{
System.out.println("Invalid input\nPlease try again\n");
isHeightValid = false;
}
}
else
{
System.out.println("Invalid input\nPlease try again\n");
isHeightValid = false;
}
}
}while(!(isNameValid)||!(isHeightValid));
input.close();
}
}
英文:
You can add the optional regular expression [./ ] into the same pattern separated by |. Validation in a single do-while can be performed like this:
import java.util.regex.*;
import java.util.*;
public class StackOverflow
{
public static void main(String[] args)
{
Boolean isNameValid = false, isHeightValid = false;
String name = null; double height = 0;
Scanner input = new Scanner(System.in);
Pattern pattern = Pattern.compile("[a-zA-Z]+|[./ ]");
do
{
if(!isNameValid)
{
System.out.print("Name: ");
name = input.nextLine();
Matcher match = pattern.matcher(name);
if (match.find())
isNameValid = true;
else
{
System.out.println("Invalid input\nPlease try again\n");
isNameValid = false;
}
}
if(isNameValid && !isHeightValid)
{
System.out.print("Height(cm): ");
if (input.hasNextDouble())
{
height = input.nextDouble();
if (height > 5 && height <= 500)
isHeightValid = true;
else
{
System.out.println("Invalid input\nPlease try again\n");
isHeightValid = false;
}
}
else
{
System.out.println("Invalid input\nPlease try again\n");
isHeightValid = false;
}
}
}while(!(isNameValid)||!(isHeightValid));
input.close();
}
}
答案2
得分: 0
你可以这样做：
validName = False
validWeight = False
while True:
if not validName:
# 获取并验证姓名
# 当找到正确的姓名时，将 validName 设置为 True
pass
if validName and not validWeight:
# 获取并验证重量
pass
if validName and validWeight:
break
如果有多于两个这样的验证步骤，你可以将每个读取和验证的过程封装在一个函数中。
英文:
You can do something like this:
Boolean validName = false, validWeight = false;
do {
if(!validName) {
//get and validate weight
// when found the correct name; set validName to true
}
if(validName && !validWeight) {
//get and validate weight
}
}while(validName && validWeight);
If there are more than two such validations you can wrap each read-validate in a function.
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论