whoami.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 20 行

//: c15:WhoAmI.java
// Finds out your network address when
// you're connected to the Internet.
// {RunByHand} Must be connected to the Internet
// {Args: www.google.com}
import java.net.*;

public class WhoAmI {
  public static void main(String[] args) 
      throws Exception {
    if(args.length != 1) {
      System.err.println(
        "Usage: WhoAmI MachineName");
      System.exit(1);
    }
    InetAddress a = 
      InetAddress.getByName(args[0]);
    System.out.println(a);
  }
} ///:~