Question

无法使用分割功能，请帮助...

假设输入= SACHIN RAMESH TENDULKAR全部为大写。

output = Tendulkar.S.R

我试过的代码是字符串数组还有其他选项吗？ -

import java.util.*;
public class substr {

public static void main(String[] args) {
    // TODO Auto-generated method stub

            Scanner s = new Scanner(System.in);
            String[] array = new String[3];
            System.out.println("Please enter first name,middle name and 
           last name in capital");

            for (int i = 0; i < array.length;i++){
                array[i] = s.nextLine();
            }
            char f=array[0].charAt(0);
            char m=array[1].charAt(0);
            char sn=array[2].charAt(0);
            String sn1="";
            for(int i=1;i<array[2].length();i++){
                char ch=array[2].charAt(i);
                if(ch>=65 && ch<90){
                    ch=(char)(ch+32);
                    }   
                    sn1+=ch;

                }
            System.out.println(sn+sn1+"."+f+"."+m); 
        }

}

Answer 1

您可以使用charAt（）查找空格，然后获取下一个字符吗？

Answer 2

因为他们同时输入所有信息，所以您只能拨打User一次。所以你的整个代码必须改变才能实现。考虑以下＆＃34;

s.nextLine()

Answer 3

您可以这样做：

import java.util.Scanner;
public class Substr {

public static void main(String[] args) {
       Scanner input = new Scanner(System.in);
       System.out.println("Please enter First Name, Middle Name and Last Name");
       String fullName = input.nextLine().toUpperCase(); // convert input to UPPERCASE
       while(fullName.charAt(fullName.length()-1)==' '){ // remove all spaces at the end of the input because it may cause problem
            fullName = fullName.substring(0, fullName.length()-1);
       }
       while(fullName.charAt(0)==' '){ // remove all spaces at the beginning of the input because it may cause problem
           fullName = fullName.substring(1, fullName.length());
       }

       String firstName = "", middleName ="", lastName ="";

       firstName = fullName.substring(0, fullName.indexOf(' ')); // the first name is from the beginning to the first occurrence of space 

       int noOfSpaces=0;
       for(int i=firstName.length(); i<fullName.length(); i++){// count the number of spaces after the first name in case user by mistake
                                                                                    // entered more than one space
            if (fullName.charAt(i)==' '){
                noOfSpaces++;
            }
            else{
                break;
            }
       }
       middleName = fullName.substring(firstName.length()+noOfSpaces, fullName.lastIndexOf(' ')); // the second name (remember we removed the spaces at the end)

       lastName = fullName.substring(fullName.lastIndexOf(' ')+1,fullName.length()); // the last name

        String customizedName = firstName + "." + middleName.charAt(0) + "." + lastName.charAt(0);
        System.out.println(customizedName); 
}

示例（注意名字前后的专用空格，第二个名字后面和姓氏后面的＆gt;赢得了输出）：

Please enter First Name, Middle Name and Last Name
    Muhammad    Yahya   Almardeny
MUHAMMAD.Y.A

另一个例子（正常）：

Please enter First Name, Middle Name and Last Name
Muhammad Yahya Almardeny
MUHAMMAD.Y.A

如何使用surname提取名字和中间名的首字母，就像在java中一样，而不使用split（）

3 个答案: