java - 在 Java 的 ArrayLists 输出中大写名称

Question

我对 Java 还比较陌生(几个星期)，我正在使用 ArrayLists 摆弄一个员工输入系统。无论如何，我想确保无论用户输入什么，输出中的名称都是相同的格式。

例子:

输入 --> 输入员工姓名:SAMANTHA

输出 --> 员工姓名:Samantha

这是我正在运行的代码，我只是不确定我可以在哪里设置格式。

import java.util.ArrayList;
import java.util.Scanner;
public class EmployeeTester_v5
{
   public static void main (String[] args)
   {

//ASSIGN VARIABLES

      String c = "";
      String newEmployee = "";
      double yearToDate = 0.0;
      double increase = 0.025;
      double newSalary = 0.0;


//ARRAY LISTS 

      ArrayList<String>first = new ArrayList<String>();
      ArrayList<String>last = new ArrayList<String>();
      ArrayList<Double>salary = new ArrayList<Double>();
      ArrayList<Integer>months = new ArrayList<Integer>();

//SCANNER INPUT

      //create a new scanner
      Scanner input = new Scanner(System.in);


//WHILE LOOP - to keep asking for user input until "No" is entered

      do{

          //USER INPUT
            System.out.println ("Enter employee first name: ");
            first.add(input.next());

            System.out.println ("Enter employee last name: ");
            last.add(input.next());

            System.out.println ("Enter employee salary: ");
            salary.add(input.nextDouble());

            System.out.println ("Number of months worked this year: ");
            months.add(input.nextInt());

            System.out.println("Enter another employee in the system?");
            c = input.next();


        }while(c.equalsIgnoreCase("Yes"));
            System.out.println();


//ARRAY OUTPUT

             for(int i=0; i < first.size(); i++)
                 {
                 yearToDate = months.get(i) * salary.get(i)/12;
                 newSalary = (increase * salary.get(i)) + salary.get(i);

                 System.out.print("Employee Name: " + first.get(i) + " ");
                 System.out.print(last.get(i)+"\n");
                 System.out.printf("Current Salary: $%.2f\n", salary.get(i));
                 System.out.printf("Year to Date: $%.2f\n", yearToDate);
                 System.out.printf("New Salary: $%.2f\n", newSalary);



                 System.out.println("----------------------");
                 }

    }

}

Answer 1

您应该做的第一件事是查看 String API https://docs.oracle.com/javase/8/docs/api/java/lang/String.html
当涉及到 Java 时，它是必须知道的，你可能在你将要从事的每个项目中都需要它:)

这里有很多方法可以实现您的目标。
例如，您可以做的是将第一个字母大写，然后附加您将强制小写的字符串的其余部分 - 查看下面的代码片段。

String inputString = input.next();
String resultString = inputString.substring(0, 1).toUpperCase() + inputString.substring(1).toLowerCase();