hello我想从java中产生gams我已经安装了gams,这里是代码 gams是一个应用程序,我想从java调用它,我相信路径是确切的,我应该怎么做才能纠正它?这让我异常 例外:错误线程“main”中的异常java.lang.NullPointerException
Exception in thread "main" java.lang.NullPointerException
at java.lang.ProcessBuilder.start(ProcessBuilder.java:441)
at java.lang.Runtime.exec(Runtime.java:593)
at java.lang.Runtime.exec(Runtime.java:466)
at gams.RunGAMS.main(RunGAMS.java:27)
Java Result: 1
这里是我从this link改变
package gams;
import java.io.File;
import java.io.BufferedReader;
import java.io.InputStreamReader;
class RunGAMS {
public static void main(String[] args) {
System.out.println("Start");
String[] cmdArray = new String[5];
cmdArray[0] ="C:"+File.separator+"Program Files"+File.separator+"GAMS23.7" + File.separator +"gams.exe";
cmdArray[1] ="C:"+File.separator+"Documents and Settings"+File.separator+"Parsa"+File.separator+"My Documents"+File.separator+"gamsdir"+File.separator+"projdir" + File.separator +"trnsport.gms";
cmdArray[2] ="C:"+File.separator+"Documents and Settings"+File.separator+"Parsa"+File.separator+".nbi"+ File.separator+"tmp";
cmdArray[3] ="LO=3";
try {
Process p = Runtime.getRuntime().exec(cmdArray);
BufferedReader stdInput = new BufferedReader(new InputStreamReader(p.getInputStream()));
String s = null;
while((s=stdInput.readLine()) !=null){
System.out.println(s);
}
p.waitFor();
}
catch (java.io.IOException e)
{
System.err.println(">>>>" + e.getMessage());
e.printStackTrace();
}
catch (InterruptedException e)
{
System.err.println(">>>>" + e.getMessage());
e.printStackTrace();
}
System.out.println("Done");
}
}
非常感谢你 – Nickool 2012-02-06 13:32:02