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我怎样才能在HashSet中添加不同的IP地址
Set<String> ips = new HashSet<String>();
String ip = generateIPAddress();
if (!ips.add(ip)) {
// What should I do here?
}
private String generateIPAddress() {
Random r = new Random();
//Now the IP is b1.b2.b3.b4
String s = r.nextInt(256) + "." + r.nextInt(256) + "." + r.nextInt(256) + "." + r.nextInt(256);
return s;
}
作业??? http://stackoverflow.com/questions/9745214/maximum-size-of-hashset – Bohemian 2012-03-16 22:51:49
你的问题到底是什么? – gobernador 2012-03-16 22:56:11