- Execute an external program and capture the output

最新推荐文章于 2021-05-08 18:31:44 发布

原创最新推荐文章于 2021-05-08 18:31:44 发布 · 813 阅读

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文章标签：

#output #exception #string #path #jdk #class

博客涉及JDK相关内容，包含output（输出）、exception（异常）、string（字符串）、path（路径）等方面。可能围绕JDK在处理输出、异常时的情况，以及路径和字符串操作等信息技术要点展开。

Execute an external program and capture the output


 import java.io.*;
 public class CmdExec {
   public CmdExec(String cmdline) {
     try {
      String line;
      Process p = Runtime.getRuntime().exec(cmdline);
      // jdk1.0.2
      DataInputStream input = 
        new DataInputStream(p.getInputStream());
      // jdk1.1.1
      // BufferedReader commandResult = 
      //  new BufferedReader
      //    (new InputStreamReader(p.getInputStream()));
      while ((line = input.readLine()) != null) {
        System.out.println(line);
        }
      input.close();
      } 
     catch (Exception err) {
      System.out.println("EXEC failed: " + err.toString());
      err.printStackTrace();
      }
    }

 public static void main(String argv[]) {
   /*
   **  javac CmdExec tree.com
   **  javac CmdExec "tree.com /a"
   */
   new CmdExec(argv[0]);
   }
 }

You can include a path for the program to be executed. On the Win plateform, you will have
problem if the path contains spaces in it. To fix the problem, put the path in quotes.


  public class Test {
    public static void main(String[] args) throws Exception {
      Process p = Runtime.getRuntime().exec(
        "/"c:/program files/windows/notepad.exe/"");
         p.waitFor();
      }
   }