Question

How to remove all non-ASCII characters from a string in Java

Answer 1

public class RemoveNonASCII {
    public static String removeNonASCII(String input) {
        StringBuilder filtered = new StringBuilder();
        
        for (char ch : input.toCharArray()) {
            if (ch <= 127) { // ASCII characters are in the range 0-127
                filtered.append(ch);
            }
        }
        
        return filtered.toString();
    }

    public static void main(String[] args) {
        String input = "©€ABC£µ¥xyz!® 123 こんにちは";
        String filtered = removeNonASCII(input);

        System.out.println("Filtered string: " + filtered);
    }
}


/*
run:

Filtered string: ABCxyz! 123 

*/

 

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