Java calls multiple classes, and java uses multiple processes to call a certain class (a class file)

java enables multiple processes to call a class (class file)

import java.io.BufferedInputStream;

import java.io.BufferedReader;

import java.io.File;

import java.io.IOException;

import java.io.InputStreamReader;

import java.lang.management. ManagementFactory;

import java.lang.management.RuntimeMXBean;

public class MultipleProcessorAccess {

private static int processorCount = 5;//5

public static void main(String[] args) {

for (int i = 0; i <processorCount; i++) {

p>

ProcessBuilder pb = new ProcessBuilder(“java”,

“PnSnapshotPerformanceTest”);//d20130306.UseJConsole

pb.directory(new File(” C:/Users/yfan/Desktop/multipleTest”));

BufferedInputStream in = null;

BufferedReader br = null;

try {

Process p = pb.start();

//returnCurrentProcessId();

// if wait the stream from server ,

// when one processor end can start next processor,

// not multiple processor

/*in = new BufferedInputStream(p. getInputStream());

br = new BufferedReader(new InputStreamReader(in));

String s;

while ((s = 61; br.readLine()) !&# 61; null) {

System.out.println(s);

}*/

} catch (IOException e) {

e.printStackTrace();

} finally {

if (br != null) {

try {

br.close();

} catch (IOException e) {}

}

if (in != null) {

try {

in.close();

} catch (IOException e) {}

}

}

}

}

private static int returnCurrentProcessId() {

RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();

String name = runtime.getName();

int pid = Integer.parseInt(name. substring(0, name.indexOf(“@”)));

System.out.println(“current process id: ” + pid);

return pid;

}

}