Question

How to create a case-insensitive function for substring search in Java

Answer 1

public class Main {
    public static boolean CaseInsensitiveSubstringSearch(String source, String target) {
        if (source == null || target == null) {
            return false;
        }
        String lowerSource = source.toLowerCase();
        String lowerTarget = target.toLowerCase();
        
        return lowerSource.contains(lowerTarget);
    }

    public static void main(String[] args) {
        String str = "Java programming language";
        String target = "PROGRAMMING";
        
        boolean result = CaseInsensitiveSubstringSearch(str, target);
        
        System.out.println("Result: " + result); 
    }
}


/*
run:

Result: true

*/

 

70+ SQL courses for beginners and professionals