如何摆脱答案中出现的“错误输入”语句

请检查为什么我的代码给出了“错误的输入”语句以及正确的答案。虽然我在else块中使用过它...

import java.util.*;
public class Encapsulation {
    public static void main(String args[]) throws InterruptedException {
    Scanner sc = new Scanner(System.in);
    System.out.print("Select operation(1:add, 2: sub): ");
    int choose = sc.nextInt();
    int a, b;
    System.out.println("Enter 1st number: ");
    a = sc.nextInt();
    System.out.println("Enter 2nd number: ");
    b = sc.nextInt();
    choice(choose, a, b);

    System.out.println("Do you want to calculate again(y/n): ");
    char select = sc.next().charAt(0);
    if (select == 'y') {
        main(args);
    } else {
        System.out.println("Closing the program.........");
        Thread.sleep(1000);
        System.out.println("Program closed succesfully");
    }
    sc.close();
}
public static int add(int a, int b) {
    return a + b;
}

public static int diff(int a, int b) {
    return a - b;
}

public static void choice(int choose, int a, int b) {
    if (choose == 1) {
        System.out.println("The sum = " + add(a, b));
    }
    if (choose == 2) {
        System.out.println("The diff = " + diff(a, b));
    } else {
        System.out.println("Wrong input!");
    }
}

}

这是终端窗口的消息。请删除此“错误输入”消息

Select operation(1:add, 2: sub): 1
Enter 1st number: 
10
Enter 2nd number: 
10
The sum = 20
Wrong input!    //This is the problem i don't want this statement
Do you want to calculate again(y/n):