Question

write a program in java to accept a string and to delete all the upper characters present it and display the new string​

Answer 1

import java.util.HashSet;

import java.util.Scanner;

import java.util.Set;

public class Main

{

public static void main(String[] args)

{

System.out .println("Welcome to Java program to remove duplicate characters from String");

Scanner scnr = new Scanner(System.in); System.out.println("Please enter a String with duplicate characters");

String input = scnr.nextLine(); String output = removeDups(input);

System.out.println("String without duplicate characters is " + output);

String withoutDups = removeDupsInPlace(input); System.out.println("String without duplicate characters in place is " + withoutDups);

scnr.close();

}

public static String removeDups(String word) { Set<Character> chars = new HashSet<>();

StringBuilder output = new StringBuilder(word.length()); for (int i = 0; i < word.length(); i++) { char ch = word.charAt(i); if (chars.add(ch)) { output.append(ch);

}

}

return output.toString();

}

public static String removeDupsInPlace(String word)

{

final StringBuilder output = new StringBuilder();

for (int i = 0; i < word.length(); i++)

{

String character = word.substring(i, i + 1);

if (output.indexOf(character) < 0) // if not contained output.append(character);

}

return output.toString();

}

}