Java虚拟机读写其他进程的数据

使用Runtime对象的exec()方法可以获得其他进程的Process对象，Process对象代表由该Java程序启动的子进程，Process类提供了如下3个方法，用于让程序和其子进程进行通讯。

InputStream getErrorStream():获取子进程的错误流

InputStream getInputStream():获取子进程的输入流

OutputStream getOutputStream():获取子进程的输出流

下面的代码实现了获取子进程的错误输出

[java]
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Test {
    public static void main(String[] args) throws Exception
    {

        Process p=Runtime.getRuntime().exec("adb");
        BufferedReader br=new BufferedReader(new InputStreamReader(p.getErrorStream()));
        String str=null;
        while((str=br.readLine())!=null)
        {
            System.out.println(str);
        }

    }



}

import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Test {
public static void main(String[] args) throws Exception
{

  Process p=Runtime.getRuntime().exec("adb");
  BufferedReader br=new BufferedReader(new InputStreamReader(p.getErrorStream()));
  String str=null;
  while((str=br.readLine())!=null)
  {
   System.out.println(str);
  }

}

}
下面程序演示两个Java程序通讯

这个数父进程

[java]
import java.io.OutputStream;
import java.io.PrintStream;

public class Test {
    public static void main(String[] args) throws Exception
    {
        Process p=Runtime.getRuntime().exec("java work");
        OutputStream os=p.getOutputStream();
        PrintStream ps=new PrintStream(os);
        ps.println("张译成");
        os.close();


    }



}

import java.io.OutputStream;
import java.io.PrintStream;

public class Test {
public static void main(String[] args) throws Exception
{
  Process p=Runtime.getRuntime().exec("java work");
  OutputStream os=p.getOutputStream();
  PrintStream ps=new PrintStream(os);
  ps.println("张译成");
  os.close();


}

}

下面是子进程

[java]
import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Scanner;

public class work {
    public static void main(String[] args) throws Exception{
        Scanner sc=new Scanner(System.in);
        FileOutputStream fis=new FileOutputStream("work");
        PrintStream ps=new PrintStream(fis);
        System.setOut(ps);
        while(sc.hasNextLine())
        {
            System.out.println(sc.nextLine());
        }
        ps.close();

    }

}

import java.io.FileOutputStream;
import java.io.PrintStream;
import java.util.Scanner;

public class work {
public static void main(String[] args) throws Exception{
  Scanner sc=new Scanner(System.in);
  FileOutputStream fis=new FileOutputStream("work");
  PrintStream ps=new PrintStream(fis);
  System.setOut(ps);
  while(sc.hasNextLine())
  {
   System.out.println(sc.nextLine());
  }
  ps.close();

}

补充：软件开发 , Java ,