参考代码:
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String email = scanner.nextLine(); int n = scanner.nextInt(); String [][]form = new String[n][3]; int cnt = 0; for(int i = 0; i < n; i++) { form[i][0] = scanner.next(); form[i][1] = scanner.next(); form[i][2] = scanner.next(); if(form[i][2].equals(email)) { cnt++; System.out.print(form[i][0] + " "); String res = ""; for(char c: form[i][1].toCharArray()) { if(Character.isLowerCase(c)) c = Character.toUpperCase(c); else if(Character.isUpperCase(c)) c = Character.toLowerCase(c); res += c; } System.out.println(res); } } if(cnt == 0) System.out.println("empty"); } }
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