Java 中的 LogManager getLoggerNames()方法，带示例

原文:https://www . geesforgeks . org/logmanager-getlogernames-method-in-Java-with-examples/

Java . util . logging . log manager的 getLoggerNames() 方法用于获取已知记录器名称的列表。此方法以枚举对象的形式返回该列表。

语法:

public Enumeration getLoggerNames()

参数:该方法不接受任何参数。

返回值:该方法以枚举对象的形式返回已知的记录器名称列表列表。

下面的程序说明了 getLoggerNames()方法:

程序 1:

// Java program to illustrate
// LogManager getLoggerNames() method

import java.util.logging.*;
import java.util.*;

public class GFG {

    public static void main(String[] args)
    {

        // Create LogManager object
        LogManager logManager
            = LogManager.getLogManager();

        Enumeration<String> listOfNames
            = logManager.getLoggerNames();

        System.out.println("List of Logger Names: ");
        while (listOfNames.hasMoreElements())
            System.out.println(listOfNames.nextElement());
    }
}

输出:

List of Logger Names: 
global

程序二:

// Java program to illustrate
// LogManager getLoggerNames() method

import java.util.logging.*;
import java.util.*;

public class GFG {

    public static void main(String[] args)
    {

        // Create LogManager object
        LogManager logManager
            = LogManager.getLogManager();

        logManager.addLogger(Logger.getLogger("GFG"));

        Enumeration<String> listOfNames
            = logManager.getLoggerNames();

        System.out.println("\nList of Logger Names: ");
        while (listOfNames.hasMoreElements())
            System.out.println(listOfNames.nextElement());
    }
}

输出:

List of Logger Names: 
GFG
global

参考:https://docs . Oracle . com/javase/9/docs/API/Java/util/logging/logmanager . html # getlogger name–

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