Returns number of CPUs in the Linus system - Java Native OS

Java examples for Native OS:CPU

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Description

Returns number of CPUs in the Linus system

Demo Code


//package com.java2s;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class Main {
    private static final String CPU_INFO = "proc/cpuinfo";
    private static final String ID_PROCESSOR = "processor";
    private static Integer cpu_count = null;

    /**// w w  w  . j  av a2s.  c om
     * Returns number of CPUs in the system
     * @return number of CPUs in the system
     */
    public static final int getCpuCount() {
        if (cpu_count == null) {
            innerGetCpuCount();
        }
        return cpu_count;
    }

    private static void innerGetCpuCount() {
        cpu_count = 0;
        BufferedReader br = null;
        try {
            br = new BufferedReader(new FileReader(CPU_INFO));

            String line;
            while ((line = br.readLine()) != null) {
                if (line.toLowerCase().contains(ID_PROCESSOR)) {
                    cpu_count++;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

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