最简单的 Dialog/Message Box for beginners?

Simplest Dialog/Message Box for beginners?

我不确定该怎么做。我在 java class 的介绍中,它要求我们使用消息框(而不仅仅是 system.out.println)我记得我们导入了一些东西,这是一个简单的改变,但我找不到关于它的任何注释。

此外,我在网络和本网站上找到的所有示例都超出了本 class 的范围。

第一次在这里发帖,如果格式有误,敬请见谅。

TLDR:尝试改变

    System.out.print("Enter renter name: ");
    renterName = input.next();

显示在消息框中而不是 Eclipse 控制台中

我知道我们导入了一些东西(与我们导入扫描仪的方式相同)来完成这项工作,但我发现的每个示例本质上都是在说创建你自己的对话框方法,这超出了我的知识范围,而且这个 class.

完整代码如下:

import java.util.Scanner;

public class RentYourVideo {

  public static void main(String[] args) {

    int numberOfRentals, finalBill;

    VideoRental rental = new VideoRental(); //runs constructor
    Scanner input = new Scanner(System.in);
    String renterName;

    System.out.print("Enter renter name: ");
    renterName = input.next();

    System.out.print("Enter number of videos to rent: ");
    numberOfRentals = input.nextInt();

    rental.setRentalFee();  //needs to set rental fee to  according to assignment
    rental.calculateBill(numberOfRentals);  //from prev input
    finalBill = rental.getFinalBill();

    System.out.println(renterName + " your total bill for " +numberOfRentals+ " videos is $" +finalBill);

    input.close();
  }
}

//将所有提示和输出更改为 DIALOG/MESSAGE BOX!!!!

public class VideoRental {

  private int rentalFee, finalBill, numberOfRentals;

  public VideoRental() {    //constructor method
    rentalFee = 0;
    finalBill = 0;
  }

  public void setRentalFee() {  //set method
    rentalFee = 5;
  }     //the assignment claims this must set rentalFee = 5

  public void calculateBill(int inRented) {
    numberOfRentals = inRented;
    finalBill = rentalFee * numberOfRentals;
  }

  public int getFinalBill() {
    return finalBill;
  }

}

看看这个:

String name = JOptionPane.showInputDialog(null, "Enter name here:");

http://docs.oracle.com/javase/7/docs/api/javax/swing/JOptionPane.html

import javax.swing.JOptionPane;

[...]

public static void main(String[] args) {

    int numberOfRentals, finalBill;

    VideoRental rental = new VideoRental(); //runs constructor

    String renterName;
    renterName = JOptionPane.showInputDialog(null, "Enter renter name: ");

    numberOfRentals = Integer.parseInt(JOptionPane.showInputDialog(null, "Enter number of videos to rent: "));

    rental.setRentalFee();  //needs to set rental fee to  according to assignment
    rental.calculateBill(numberOfRentals);  //from prev input
    finalBill = rental.getFinalBill();

    JOptionPane.showMessageDialog(null, renterName + " your total bill for " +numberOfRentals+ " videos is $" +finalBill);
  }