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java中同一对象内的对象列表

methods oop java

ovod · 技术社区 · 11 年前

我有下一种情况:

public class Network {
   protected int mask;
   protected IPv4Address address;

   public Network(IPv4Address address, int maskLength) {
    blahblah
   }
   public mymethod() {
    Network[] privatnetworks = {new Network(new IPv4Address("10.0.0.0"), 8), new Network(new IPv4Address("172.16.0.0"), 12)}
}

在这里,每次我调用我的方法时,我都需要创建对象列表,这对我来说是低效的。我可以创建一次并将其用于我的所有方法吗?对不起,如果这个问题简单或愚蠢,我是一个java新手。

3 回复 | 直到 11 年前

Maroun 11 年前

制作 Network 一 static 变量,它将只初始化一次。

static Network[] privatnetworks = {new Network(new IPv4Address("10.0.0.0"), 8), new Network(new IPv4Address("172.16.0.0"), 12)}

Jens 11 年前

将变量定义为实例变量:

public class Network {
   protected int mask;
   protected IPv4Address address;
   Network[] privatnetworks = {new Network(new IPv4Address("10.0.0.0"), 8), new Network(new IPv4Address("172.16.0.0"), 12)}

   public Network(IPv4Address address, int maskLength) {
    blahblah
   }
   public mymethod() {
    }

Dhruv Ramani 11 年前

使用此项:

public class Network {
   protected int mask;
   protected IPv4Address address;

   private static  Network[] privatnetworks = {new Network(new IPv4Address("10.0.0.0"), 8), new Network(new IPv4Address("172.16.0.0"), 12)}

   public Network(IPv4Address address, int maskLength) {
    blahblah
   }
   public mymethod() {

}

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