DefaultInterface.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * particular file as subject to the "Classpath" exception as provided
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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package java.net;

/**
 * Choose a network interface to be the default for outgoing IPv6 traffic that does not specify a scope_id (and which needs one).
 *
 * Platforms that do not require a default interface may return null which is what this implementation does.
 */
/*
 * 网络接口的默认实现，默认为空实现
 *
 * 选择一个网络接口作为未指定scope_id（需要一个）的传出IPv6流量的默认接口。
 * 不需要默认接口的平台可能会返回null，这是此实现的作用。
 */
class DefaultInterface {
    static NetworkInterface getDefault() {
        return null;
    }
}