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import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader ;
import java.io.BufferedReader;
public class Exec_Output{
public static void main(String []args)throws IOException,InterruptedException{
Runtime rt = Runtime.getRuntime();
Process p = rt.exec("dir");
//int exitValue = p.exitValue();
//int exitValue = p.waitFor();
InputStream is = p.getInputStream();
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line = null;
System.out.println("<OUTPUT>");
while((line = br.readLine())!=null){
System.out.println(line);
System.out.println("</OUTPUT>");
int exitValue = p.waitFor();
System.out.println("Process exitValue="+exitValue);
}
}
}
//Ö´Ðнá¹û£¨ÔÚUbuntu9.10ÏÂÖ´ÐУ©
<OUTPUT>
class CUtil.java Exec.java Exec_Javac.java Exec_Output.java Str.java
</OUTPUT>

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E:classescomjavaworldjpitfallsarticle2>java BadExecWinDir
java.io.IOException: CreateProcess: dir error=2
at java.lang.Win32Process.create(Native Method)
at java.lang.Win32Process.<init>(Unknown Source)
at java.lang.Runtime.execInternal(Native Method)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at java.lang.Runtime.exec(Unknown Source)
at BadExecWinDir.main(BadExecWinDir.java:12)
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import java.io.IOException;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
public class DES {
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