From Runtime.exec() to ProcessBuilder : Runtime « Development Class « Java






  1. Java
  2. Development Class
  3. Runtime

From Runtime.exec() to ProcessBuilder

    

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Arrays;

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

    Runtime runtime = Runtime.getRuntime();
    Process process = runtime.exec(args);
    InputStream is = process.getInputStream();
    InputStreamReader isr = new InputStreamReader(is);
    BufferedReader br = new BufferedReader(isr);
    String line;

    System.out.printf("Output of running %s is:", Arrays.toString(args));

    while ((line = br.readLine()) != null) {
      System.out.println(line);
    }

  }
}








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8.Execute a command with more than one argument
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12.Get current size of heap in bytes
13.Get maximum size of heap in bytes.
14.Get amount of free memory within the heap in bytes.
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16.Command and its arguments supplied in an array
17.Execute a command with an argument that contains a space
18.Execute a command with an argument that contains a space: use array
19.Calculate process elapsed time
20.Registering Shutdown Hooks for Virtual Machine
21.Get memory information
22.Returns a description of the JVM.
23.Returns a description of the operating system and processor configuration.
24.Returns a report of used and available memory.
25.Ensure that there is only one instance
26.Returns used(max) memory in MB