java中的實現建立一個抽象類

   package com.yashu;      public abstract class Employee   {       private String name;       private String address;       private int number;          public abstract double computePay(Double pay);   }

繼承抽象類

package com.yashu;      public class Salary extends Employee   {       private double salary; // Annual salary          public double computePay(Double pay)       {           System.out.println("Computing salary pay for " + "Lei Li");           return pay * 2;       }   }

測試程式碼

package com.yashu;      public class ExtendsTest {       public static void main(String[] args) {           System.out.println("this is com.yashu.ExtendsTest");           Salary s = new Salary();           Double d = s.computePay(10.10);           System.out.println(d);       }   }

上面沒問題, 我測試過了, 我的測試環境,

生成dex軟體: idea方法參照: 百度搜索github autojsUseDexautojs中抽象類的繼承 匯入dex, 我用的是以autojs專案方式執行程式碼, main.js和extendstest.dex在同一個資料夾

let dexFilePath = files.join("./extendstest.dex"); runtime.loadDex(dexFilePath);  

匯入抽象類Employee

importClass(com.yashu.Employee); 

例項化Salary, 並呼叫抽象方法computePay

   s = new Salary();   d = s.computePay(10.1);   log(d);

實現繼承抽象類的關鍵程式碼JavaAdapter, 第一個引數是抽象類, 第二個引數是抽象類方法的具體實現

function Salary() {     let salary = new JavaAdapter(Employee, {       computePay: function (pay) {         log("Computing salary pay for " + "Lei Li");         return pay * 2;       },     });     return salary;   }