java - "Can be package local"是什么意思？ (IDEA 检查)

Question

我将 IntelliJ 用于“检查代码”，其结果之一是:

  问题概要     可以本地打包(在第 18 行(public class HeartBeat))

这是什么意思，我该如何解决？

整个类(class)都是这样的:

package com.xxxxxxxxxxx.app.xxxx;

public class HeartBeat
{
    private static final Logger LOG = LoggerFactory.getLogger( HeartBeat.class );
    private final File heartBeatFile;


    public HeartBeat( File heartBeatFile )
    {
        this.heartBeatFile = heartBeatFile;
    }


    public void beat()
    {
        try
        {
            FileUtils.writeStringToFile( heartBeatFile, String.valueOf( System.currentTimeMillis() ) );
        }
        catch( IOException e )
        {
            LOG.error( "Error while writing heart beat log", e );
        }
    }
}

Answer 1

IDEA 指的是 package-private 可见性。

A class may be declared with the modifier public, in which case that class is visible to all classes everywhere. If a class has no modifier (the default, also known as package-private), it is visible only within its own package

有关详细信息，请参阅 Controlling Access to Members of a Class .

您可以通过从类中删除 public 关键字(如果该类不打算在包外使用)或使用其他包中的类来解决问题。