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Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at TestPrintStream2.main(TestPrintStream2.java:12)
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import java.io.*;
public class TestPrintStream2 {

public static void main(String[] args)
{
        String fileName = args[0];
if(fileName != null)
list(fileName,System.out);

}

public static void list(String s , PrintStream ps)
{
try
{
BufferedReader br = new BufferedReader(
new FileReader(s));

String str = null;
while((str = br.readLine()) != null)
{
ps.println(str);
}

br.close();
}
catch(IOException e)
{
ps.println("ÎļþδÕÒµ½!");
}
}

}
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