甚至在循环外运行的方法

Question

我有这个方法可以作为其他方法的菜单：

public static void menu(){

    boolean works = true;

    System.out.println("\n1 - Register Car\t2 - Register Client\t3 - Rent car\n4 - Returning car\t5 - Show list\t6 - Exit\n");

    System.out.print("Input: ");

    int operacao = scan.nextInt();

    do {

        if (operacao == 1) {

            cadVeiculo();

        } else if (operacao == 2) {

            cadCliente();

        } else if (operacao == 3) {

            locar();

        } else if (operacao == 4) {

            devolver();

        } else if (operacao == 5) {

            listar();

        } else if (operacao == 6){

            works= false;

        }

    } while (works);

}

我不明白的是，当我运行程序并按“6”时，程序停止了，好的。但是当我按“1”注册汽车然后按“6”退出程序时，程序一直要求我输入另一个输入。

我所期望的是，当我运行该程序并按“6”退出时，它只会完全停止该程序。

Answer 1

在do-while循环中移动println和行：scanner.nextInt()这是一个仅打印出方法名称的修改示例：import java.util.Scanner;class Main {  public static void main(String[] args) {    menu();  }  public static void menu() {    Scanner scan = new Scanner(System.in);    boolean works = true;    do {      System.out.println(          "\n1 - Register Car\t2 - Register Client\t3 - Rent car\n4 - Returning car\t5 - Show list\t6 - Exit\n");      System.out.print("Input: ");      int operacao = scan.nextInt();      if (operacao == 1) {        System.out.println("cadVeiculo();");      } else if (operacao == 2) {        System.out.println("cadCliente();");      } else if (operacao == 3) {        System.out.println("locar();");      } else if (operacao == 4) {        System.out.println("devolver();");      } else if (operacao == 5) {        System.out.println("listar();");      } else if (operacao == 6) {        System.out.println("Goodbye!");        works = false;      }    } while (works);    scan.close();  }}用法示例：1 - Register Car    2 - Register Client 3 - Rent car4 - Returning car   5 - Show list   6 - ExitInput: 1cadVeiculo();1 - Register Car    2 - Register Client 3 - Rent car4 - Returning car   5 - Show list   6 - ExitInput: 3locar();1 - Register Car    2 - Register Client 3 - Rent car4 - Returning car   5 - Show list   6 - ExitInput: 4devolver();1 - Register Car    2 - Register Client 3 - Rent car4 - Returning car   5 - Show list   6 - ExitInput: 6Goodbye!