2023年5月31日 23:18:22go评论73阅读模式

英文:

Why am I getting the error 'Main method not found in class' even though I defined the main method in my Java program with inheritance?

问题

package code.now;

class Test {
    public void fun() {
        System.out.println("Coding Ninjas");
    }
}

class Derived extends Test {

    public void fun() {
        System.out.println("Coding Ninjas");
    }

    public static void main(String[] args) {
        Derived obj = new Derived();
        obj.fun();
    }
}

我正在尝试执行这段代码，并遇到以下错误：

"Error: Main method not found in class code.ninja.Derived, please define the main method as: public static void main(String[] args) or a JavaFX application class must extend javafx.application.Application"

但我已经定义了main方法，并尝试检查是否存在任何语法和拼写错误，但代码仍然返回错误。

英文:

package code.now;


class Test {
    public void fun() {
        System.out.println(&quot;Coding Ninjas&quot;);
    }
}

class Derived extends Test {
	
    public void fun() {
        System.out.println(&quot;Coding Ninjas&quot;);
    }
    public static void main(String[] args) {
        Derived obj = new Derived();
        obj.fun();
    }
}

i'm trying to execute this code and running into the below error

"Error: Main method not found in class code.ninja.Derived, please define the main method as:
public static void main(String[] args)
or a JavaFX application class must extend javafx.application.Application"

but I already defined the main method and also tried to check for any syntax and spelling mistakes but still the code is returning the error.

答案1

得分: 1

谢谢你的帮助。

我觉得我找到了问题所在。在同一个包中有两个文件

> 包 code.ninja;

&gt; Main.java
&gt; Deriveded.java

Main.java（这个文件有一个类名为 Derived），所以当我尝试创建一个名为 Derived.java 的新Java类时，它会报错，但当我将类名更改为 Deriveded.java 时，错误消失了。
Deriveded.java（之前是Derived.java）

同一包中的Main.java程序

Deriveded.java

英文:

Thanks for the help.

I think I found the issue. There are two files in the same package

> package code.ninja;

&gt; Main.java
&gt; Deriveded.java

Main.java ( this has a class name Derived ), so when I tried to create a new java class with Derived.java it's throwing error, but after I changed the class to Deriveded.java, the errors are gone.
Deriveded.java (previously it was Derived.java )

Main.java program in the same package

Deriveded.java