谁知道python代码调用java代码总是不成功为什么

小小小菜菜菜

以下是Java代码：

package com.test;

import java.io.*;
import java.util.*;


class EmpManage {
        private ArrayList al = null;

        public EmpManage() {
                al = new ArrayList();
        }

        public void addEmp(Employer emp) {
                al.add(emp);
        }

        public void showEmpInfo(String no) {
                for (int i = 0; i < al.size(); i++) {
                        Employer temp = (Employer) al.get(i);
                        if (temp.getNo().equals(no)) {
                                System.out.println("SDF" + temp.getNo() + "似睡非睡" + temp.getName() + "是否三?" + temp.getSalary());
                                break;
                        }
                }
        }


        public void updateSal(String empNo, float newsalary) {
                for (int i = 0; i < al.size(); i++) {
                        Employer temp = (Employer) al.get(i);
                        if (temp.getNo().equals(empNo)) {
                                temp.setSalary(newsalary);
                                break;
                        }
                }
        }

        
        public void delEmp(String empNo) {
                Employer temp = null;
                
                for (int i = 0; i < al.size(); i++) {
                        temp = (Employer) al.get(i);
                        if (temp.getNo().equals(empNo)) {
                                break;
                        }
                }
                al.remove((Object) temp);
        }
}
@SuppressWarnings("unchecked")
class Employer {
        private String name;
        private float salary;

        private String no;

java主函数的代码

package com.test;

public class Num {

        public static void main(String[] args) {
                Employer em = new Employer("wjc",12,"no123");
                System.out.println("当前的类"+em.getClass());
                System.out.println(em.getName()+em.getNo()+em.getSalary());
        }

}

python调用代码：

if __name__ == "__main__":
    import math
    import jpype
    import os
    jvmPath = r"D:\Program Files\Java\jdk1.8.0_192\jre\bin\server\jvm.dll"
    # java jar位置，被调用的jar
    jarpath = os.path.join(os.path.abspath("."), r"E:\gitee\Java\java中数组&集合类&泛型&排序\src\com\test\test.jar")
    # 启动jvm，如果已经启动了，再次启动会报错，所以try except一下
    # 其中参数convertStrings设置为false，意思是java的string不转换为python的string类型。不设置为false的话，会报警warning：
    # Deprecated: convertStrings was not specified when starting the JVM. The default
    # behavior in JPype will be False starting in JPype 0.8. The recommended setting
    # for new code is convertStrings=False. The legacy value of True was assumed for
    # this session. If you are a user of an application that reported this warning,
    # please file a ticket with the developer.
    try:
        jpype.startJVM(jvmPath,
                       "-ea",
                       "-Djava.class.path=%s"%(jarpath))
    except:
        pass
    # ②、加载java类（参数是java的长类名）
    javaClass = jpype.JClass('com.test.Employer')
    jc = javaClass("wjc", 144, "No123")
    print(jc.getName(), jc.getNo(), jc.getSalary())
    jpype.shutdownJVM()

执行python代码时会出现如下的报错
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "D:\Program Files\JetBrains\PyCharm 2020.1\plugins\python\helpers\pydev\_pydev_bundle\pydev_umd.py", line 197, in runfile
    pydev_imports.execfile(filename, global_vars, local_vars)  # execute the script
  File "D:\Program Files\JetBrains\PyCharm 2020.1\plugins\python\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "E:/gitee/Python/扩展练习/game.py", line 76, in <module>
    javaClass = jpype.JClass('com.test.Employer')
  File "E:\gitee\Python\venv\lib\site-packages\jpype\_jclass.py", line 99, in __new__
    return _jpype._getClass(jc)
TypeError: Class com.test.Employer is not found

哪位大佬帮忙看看，怎么解决的

当初约定

它说类找不到

小小小菜菜菜

当初约定 发表于 2022-5-26 15:54
它说类找不到

就是这个问题，我也是提示类找不到，所以来论坛请教下

hrpzcf

访问性修饰符的问题吧？没学过 java 不清楚，是不是应该在类前面加 public 修饰符？