Input sentence and convert capital letters to small and vice versa in Java
String - Question 7
In this question, we will see how to input a sentence and convert all the capital letters to small letters and vice versa in Java programming. To know more about string click on the string lesson.
Q7) Write a program in Java to input a sentence and convert all the capital letters to small letters and vice versa.
Program
import java.util.Scanner;
public class Q7
{
public static void main(String args[])
{
String s;
char ca[]; // declared a character array
int i;
Scanner sc=new Scanner(System.in);
System.out.println("Enter a sentence");
s=sc.nextLine();
ca=s.toCharArray(); // store the string into the character array
for(i=0; i<ca.length; i++)
{
// check if the character is an alphabet
if(Character.isAlphabetic(ca[i])==true)
{
if(Character.isUpperCase(ca[i])==true)
{
// change the character to lowercase if uppercase
ca[i]=Character.toLowerCase(ca[i]);
}
else if(Character.isLowerCase(ca[i])==true)
{
// change the character to uppercase if lowercase
ca[i]=Character.toUpperCase(ca[i]);
}
}
}
//printing the character array
for(i=0; i<ca.length; i++)
{
System.out.print(ca[i]);
}
}
}Output
Enter a sentence We arE LiVinG in A DemocraTiC CounTRY wE ARe lIvINg IN a dEMOCRAtIc cOUNtry
