真正最好的是将所有内容都放在一个类中，没有理由将一个类分成两个类，只是为了使获取器和设置器与其他类分开，这 没有任何意义
。我确实想知道您是否误解了您的作业。
import java.util.Scanner;class shoppingApp{ //since it's an instance field not local to the class it's declared here instead of main static String orangeSelected = ""; public static void main(String[] args) { //orange selected is an odd name for a scanner, just use scan or something similar Scanner scan = new Scanner(System.in); //note that you were missing a semicolon System.out.println("Premium Orangesn"); //include a new line or a space before asking for input, for example with n orangeSelected = scan.nextLine(); } //setter public static void setOrangeSelected(String str) { orangeSelected = str; } //getter public static String getOrangeSelected() { return orangeSelected; } //Note that all methods and instance fields are static because the main method must be static if you don't understand this yet that's ok.}现在，如果出于某种原因您绝对 必须 使用两个类，则它看起来应该像这样，尽管我会注意到，只是在不理解的情况下复制和粘贴我的代码将是 作弊行为 。
import java.util.Scanner;class shoppingApp{ //normally this shouldn't be public public static String orangeSelected = ""; public static void main(String[] args) { Scanner scan = new Scanner(System.in); System.out.println("Premium Orangesn"); orangeSelected = scan.nextLine(); }} class gettersAndSetters{ //setter public void setOrangeSelected(String str) { Main.orangeSelected = str; } //getter public String getOrangeSelected() { return Main.orangeSelected; }}
