字符类-将字符串中每个单词的首字母大写

Question

I'm having trouble with a program, in which i'm supposed to accept a string input, change it to char data and then capitalize the first letter of every word in the "string" using the Character class.

The code is the following:

import java.util.*;
public class wrapper
{
    public static void main(String[] args)
    {
        Scanner input= new Scanner(System.in);
        String s1;
        s1=input.nextLine();
        s1= s1.trim();
        int howLong= s1.length();
        int i;
        int counter;
        char ch;
        for(counter=0; counter<= howLong; counter++)
        {
            ch=s1.charAt(counter);            
            System.out.print(ch);
        }

        }
}

I'm just trying to change the string data to char data using a for loop at the moment, but the program won't run even though it compiles. (I'm using the BlueJ IDE)

Answer 1

You have to print a statement on the screen to enter a string, or, the console wouldn't open automatically.

Copy the program below and enter it instead of your program. It'll work perfectly. The program is:

import java.util.*;
public class wrapper
{
    public static void main(String[] args)
    {
        System.out.println("Enter a string");
        Scanner input= new Scanner(System.in);
        String s1;
        s1=input.nextLine();
        s1= s1.trim();
        int howLong= s1.length();
        int i;
        int counter;
        char ch;
        for(counter=0; counter< howLong; counter++)
        {
            ch=s1.charAt(counter);            
            System.out.print(ch);
        }

        }
}

Hope this helped you!

Regards,

Rachit Bhargava