capitalise the first letter of every word in a sentence-CodePudding

hi guys im trying to capitalise the first letter of every string however it doesn't seem to work.

import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;

public class Main {
  public static void main(String[] args) throws IOException {
    InputStreamReader reader = new InputStreamReader(System.in, StandardCharsets.UTF_8);
    BufferedReader in = new BufferedReader(reader);
    String line = in.readLine();
    while ((line = in.readLine()) != null) {
      String output = line.substring(0, 1).toUpperCase()   line.substring(1)   " ";
      System.out.println(output);
    }
  }
}

the system inputs a sentence like "stack overflow" and needs the output to be "Stack Overflow" so every letter is capital.

It seems to only put the same input, no change. i have searched everywhere online however most resources are only for the first string.

any help would be appreciated.

CodePudding user response：

A "simple" a.k.a. an overlooked typo is what you have at line no. 9.

Because of that typo, it reads the input then goes to the next line, skipping your while-loop.

I also saw that you can only capitalize the first letter of your first word, which is definitely not what you were planning to do.

Simply modify your code into:

public class Main {
  public static void main(String[] args) throws IOException {
    try(
      InputStreamReader reader = new InputStreamReader(System.in, StandardCharsets.UTF_8);
      BufferedReader in = new BufferedReader(reader)
    ){
      String line;
      while ((line = in.readLine()) != null) {
        String output="";
        for (String s:line.split(" ")) {
          output  = s.substring(0, 1).toUpperCase()   s.substring(1)   " ";
        }
        System.out.println(output);
      }
    }
  }
}

I also noticed that you have several "leakages" into your code which is~ in other words, "bad practice" so the code looks a tad bit different.

CodePudding user response：

Try with this code.

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.nio.charset.StandardCharsets;

public class Main {
   public static void main(String[] args) throws IOException {
       InputStreamReader reader = new InputStreamReader(System.in, StandardCharsets.UTF_8);
       BufferedReader in = new BufferedReader(reader);
       String line = null;
       String output = "";
       while ((line = in.readLine()) != null) {
           line = line.trim();
           String[] lineSplitArr = line.split(" ");
           for (String s : lineSplitArr) {
               output  = (s.substring(0, 1).toUpperCase()   s.substring(1) " ");
           }
           System.out.println(output);
           break;
       }
   }
}