Java 1.3.1，编译器错误
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Java 1.3.1, compiler errors
提问by Crystal
I'm using a new work computer that has an old sdk, Java 1.3.1, on it and wanted to see if I could do some class homework on it. I have this file from our professor and it works on his machine in class, and I am getting compiler errors when I run it. I checked the Java help files onlines and it looks like Collections have been supported prior to 1.3.1 so I am not sure why I am getting these errors. Here is my code:
我正在使用一台新的工作计算机，上面有一个旧的 sdk，Java 1.3.1，我想看看我是否可以做一些课堂作业。我从我们的教授那里得到了这个文件，它在课堂上在他的机器上运行，当我运行它时出现编译器错误。我在网上查看了 Java 帮助文件，看起来在 1.3.1 之前已经支持集合，所以我不确定为什么会出现这些错误。这是我的代码：
import java.io.*;
import java.util.*;
public class WriteFile
{
public static void main(String[] args)
{
if(args.length == 0) {
args = new String[] { ".." };
}
List<String> nextDir = new ArrayList<String>();
nextDir.add(args[0]);
try
{
while(nextDir.size() > 0)
{
File pathName = new File(nextDir.get(0));
String[] fileNames = pathName.list();
for(int i = 0; i < fileNames.length; i++)
{
File f = new File(pathName.getPath(), fileNames[i]);
if (f.isDirectory())
{
System.out.println(f.getCanonicalPath());
nextDir.add(f.getPath());
}
}
nextDir.remove(0);
}
}
catch(IOException e)
{
e.printStackTrace();
}
}
}
Errors: '(' or ']' on line 12 which to me doesn't look like an error. Then a lot of cannot resolve symbol for List, String, nextDir on line 12, etc.
错误：第 12 行的 '(' 或 ']' 对我来说这看起来不像是错误。然后很多无法解析第 12 行的 List、String、nextDir 等符号。
I figured it's either something super obvious, or something wrong with my work configuration. Thanks.
我认为这要么是非常明显的，要么是我的工作配置有问题。谢谢。
回答by Java Drinker
Generics is only supported from java 1.5+
泛型仅从 java 1.5+ 支持
Use regular lists like
使用常规列表，如
List nextDir = new ArrayList();
That should work hopefully
这应该很有希望
回答by Drew Wills
I don't believe generics (i.e. List<String>) were supported prior to Java 5.
我不相信List<String>在 Java 5 之前支持泛型（即 ）。
