java 获取进程的processId

package us.mine.demo.jvm.util;

import java.lang.management.ManagementFactory;
import java.lang.management.RuntimeMXBean;

public class GetPID {

public static void main(String[] args){
System.out.println(getPid());
}

public static int getPid() {
RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
String name = runtime.getName(); // format: "pid@hostname"
try {
return Integer.parseInt(name.substring(0, name.indexOf('@')));
} catch (Exception e) {
return -1;
}
}
}