exit java_没有System.exit，如何退出Java程序？（通过用户输入？）
這是我的代碼。我不確定如何使用返回值退出程序。有任何想法嗎？這是我完成任務的最后一步。重要區域標有我聽到了返回的消息，但是當我將main中的void更改為int時，程序會說main必須為void。
import java.util.Scanner;
public class CommissionCalculator {
public static void main(String args[]) {
// Initialize a Scanner to read input from the command line
Scanner ItemSelect = new Scanner(System.in);
double comp = 200.00;
double item1 = 239.99;
double item2 = 129.75;
double item3 = 99.95;
double item4 = 350.89;
double comm = 0.09;
int choice;
/* Note that we'll be doing this at least once and most likely multiple times...
* Prompt the user with a menu of the four items and their values (this information is included in the problem statement)
*/
System.out.println("Item\tValue");
System.out.println("1\t$239.99");
System.out.println("2\t$129.75");
System.out.println("3\t$99.95");
System.out.println("4\t$350.89");
/* Display the user's current compensation */
System.out.printf("Current compensation: $%.2f", comp);
/*
* Prompt and take input from the user (you may assume that they will only enter int values)
* They'll enter an item number (1 - 4) to record its sale or 0 to exit
*
* NOTE: THE U0SER DOES NOT ENTER PRICES DIRECTLY... THEY ENTER ITEM NUMBERS TO INDICATE WHAT WAS SOLD
* NOTE: THE USER MAY ENTER THE SAME ITEM NUMBRER MULTIPLE TIMES
*
* If the user provides invalid input (a value other than 0 - 4) display "ERROR: Invalid input!" and prompt them again
*/
do
{
System.out.print("\nPlease select an item from the " +
"list above (or enter 0 to exit): ");
choice = ItemSelect.nextInt();
{
if (choice != 1 && choice != 2 && choice != 3 && choice != 4 && choice != 0)
{
do
{
System.out.print("ERROR: Invalid Input!\n");
System.out.println("Item\tValue");
System.out.println("1\t$239.99");
System.out.println("2\t$129.75");
System.out.println("3\t$99.95");
System.out.println("4\t$350.89");
System.out.printf("Current compensation: $%.2f", comp);
System.out.print("\nPlease select an item from the " +
"list above (or enter 0 to exit): ");
choice = ItemSelect.nextInt();
if (choice == 1)
{
comp += (comm * item1);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 2)
{
comp += (comm * item2);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 3)
{
comp += (comm * item3);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 4)
{
comp += (comm * item4);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 0)
{
System.out.printf("Total Earnings: $%.2f", comp);
System.exit(0); ///
}
}while (choice != 1 && choice != 2 && choice != 3 && choice != 4 && choice != 0);
}
else
{
if (choice == 1)
{
comp += (comm * item1);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 2)
{
comp += (comm * item2);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 3)
{
comp += (comm * item3);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 4)
{
comp += (comm * item4);
System.out.printf("Current compensation: $%.2f", comp);
}
if (choice == 0)
{
System.out.printf("Total Earnings: $%.2f", comp);
System.exit(0);
}
}
}
}while (choice != 0);
/* After the user enters 0, display the salesperson's earnings in the format "Total earnings: $NNN.NN" and exit
* For example, if the salesperson sold two item 3s this week the final output would be "Total earnings: $217.99"
*/
if (choice == 0)
{
System.out.printf("Total Earnings: $%.2f", comp);
System.exit(0); ///
}
ItemSelect.close();
System.exit(0); ///
}
}
總結
以上是生活随笔為你收集整理的exit java_没有System.exit，如何退出Java程序？（通过用户输入？）的全部內容，希望文章能夠幫你解決所遇到的問題。
- 上一篇： 男子花400万买光金条 店员果断报警：都
- 下一篇： java lambda例子_Java l