请问这个程序怎样编译

[hubai]

import java.net.*;

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

[swingcoder]

好像少了类：IntAddress

[hubai]

他是由java.net提供的.<Thinking in Java>(509页)有

[abitoom]

你是不是写错了,在main()中是args,在IntAddress.getByName()中是Args.
大小写不对.

[hubai]

书上好像都是小写,<Thinking in java >510页

[lyonchen]

import java.net.*;

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

[woowindice]

import java.net.*;

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

System.out.println(a);
}
}


this is right!

[kkhui]

InetAddress

[hubai]

不好意思,打错了,这下能编译了,但用以下命令运行时出错
java WhoAmI 206
我的机器名206

[pilishine]

我试了一下:
import java.net.*;

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

System.out.println(a);
}
}

保存WhoAmI.java,不能编译;
public class WhoAmI->public class t;保存t.java,能编译;
运行:java t sanxia(机器名)
成功

[coollbt]

你先程序改成这样：把InetAddress a=InetAddress.getByName(Args[0]);改成
InetAddress a=InetAddress.getByName(args[0]);
将文件保存为WhoAmI.java
然后在命令符里输入：javac WhoAmI.java