java代码调用bat文件

package com.gyb;
import java.io.IOException;
import java.io.InputStream;

public class InvokeBat4 {
public void runbat(String batName) {
String cmd = "cmd /k start D:\\new\\news.bat";// pass
try {
Process ps = Runtime.getRuntime().exec(cmd);
InputStream in = ps.getInputStream();
int c;
while ((c = in.read()) != -1) {
System.out.print(c);// 如果你不需要看输出，这行可以注销掉
}
in.close();
ps.waitFor();
} catch (IOException ioe) {
ioe.printStackTrace();
}
catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("child thread donn");
}

public static void main(String[] args) {
InvokeBat4 test1 = new InvokeBat4();
test1.runbat("news");
System.out.println("main thread");
}
}

------bat文件中这样写

d:& cd new
java -jar -Xmn600m -Xms1200m -Xmx1200m lmsp-news-snatch.jar
exit