如何将界面放在单独的文件中? [英] How can I put interface in a seperate file?

问题描述

我被这个错误困扰.我想将我的接口和类放在单独的文件中.但是编译器抛出错误.任何建议将不胜感激

I am stuck with this error. I want to put my interface and class in separate files. But the compiler is throwing an error. Any suggestion will be appreciated

我已经创建了一个接口和类

I have create an interface and class

.. test \ t1.java

package test;

 interface t1
{
    public void sayHello();
}

.. \ test \ HelloWorld.java

package test;

public class HelloWorld implements t1
{
    public void sayHello()
    {
        System.out.println("Hello World");
    }
    public static void main(String args[])
    {
        HelloWorld h=new HelloWorld();
        h.sayHello();
    }
}

我尝试编译它，但是编译器抛出错误

I tried to compile it but the compiler is throwing an error

test>javac HelloWorld.java
HelloWorld.java:3: error: cannot find symbol
public class HelloWorld implements t1
                                   ^
  symbol: class t1
1 error

推荐答案

用于编译

我没有提供完整的路径

javac -classpath e:\user\java; HelloWorld.java

运行

我没有在类名中包含要执行的有效程序包名称.

I didn't include the valid package name with class name for execution.

    E:\user\java\test>java -classpath e:\user\java\; test.HelloWorld
Hello World

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