如何使用JAVA 运行UNIX 命令(create, ls , rm )

import java.io.*;

public class ExecUnix {
  public static void main(String[] args) throws IOException {
   

    for (int i=0; i<10; i++) {
      new File("/tmp/file" + i).createNewFile();
    }

    Runtime.getRuntime().exec("ls -l /tmp/file? > /tmp/data_collect");
    Runtime.getRuntime().exec("rm -f /tmp/file?");

  }
}