Source Code:
public class SwapCase {
public static void main(String[] args) {
String s = “Java”;
String res = “”;
for(int i=0; i<s.length(); i++) {
char c = s.charAt(i);
if(Character.isLowerCase(c)) {
res = res + Character.toUpperCase(c);
} else {
res = res + Character.toLowerCase(c);
}
}
System.out.println(res);
}
}
Output:
