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- import java.awt.geom.AffineTransform;
- import java.lang.invoke.SwitchPoint;
- import java.util.concurrent.Semaphore;
- import java.util.*;
- public class Main {
- public static void main(String args[]) {
- init();
- List<Thread> c_atoms = new ArrayList<>();
- List<Thread> h_atoms = new ArrayList<>();
- List<Thread> o_atoms = new ArrayList<>();
- for(int i = 0; i < 20; i++) {
- c_atoms.add(new C());
- }
- for(int i = 0; i < 40; i++) {
- h_atoms.add(new H());
- }
- for(int i = 0; i < 20 ;i++) {
- o_atoms.add(new O());
- }
- for(int i = 0; i < 20 ; i++) {
- c_atoms.get(i).start();
- }
- for(int i = 0; i < 40; i++) {
- h_atoms.get(i).start();
- }
- for(int i = 0; i < 20 ;i++) {
- o_atoms.get(i).start();
- }
- try {
- for(int i = 0; i < 20 ; i++) {
- c_atoms.get(i).join();
- }
- for(int i = 0; i < 40; i++) {
- h_atoms.get(i).join();
- }
- for(int i = 0; i < 20 ;i++) {
- o_atoms.get(i).join();
- }
- }
- catch (InterruptedException e) {
- }
- }
- static Semaphore c;
- static Semaphore h;
- static Semaphore o;
- static Semaphore c_created;
- static Semaphore h_created;
- static Semaphore o_created;
- static Semaphore boss;
- private static void init() {
- c = new Semaphore(2);
- h = new Semaphore(4);
- o = new Semaphore(2);
- c_created = new Semaphore(0);
- h_created = new Semaphore(0);
- o_created = new Semaphore(0);
- boss = new Semaphore(0);
- }
- static class C extends Thread {
- private void excecute() throws InterruptedException {
- c.acquire(1);
- c_created.release(6);
- h_created.acquire(1);
- o_created.acquire(1);
- boss.release(6);
- System.out.println("C bonding");
- c.release(1);
- }
- @Override
- public void run() {
- try {
- excecute();
- } catch (InterruptedException e) {
- }
- }
- }
- static class H extends Thread {
- private void excecute() throws InterruptedException{
- h.acquire(1);
- c_created.acquire(1);
- h_created.release(4);
- o_created.acquire(1);
- boss.acquire(1);
- System.out.println("H bonding");
- h.release();
- }
- @Override
- public void run() {
- try {
- excecute();
- }
- catch (InterruptedException e) {
- }
- }
- }
- static class O extends Thread {
- private void excecute() throws InterruptedException{
- o.acquire(1);
- c_created.acquire(1);
- h_created.acquire(1);
- o_created.release(6);
- boss.acquire(1);
- System.out.println("O bonding");
- o.release(1);
- }
- @Override
- public void run() {
- try {
- excecute();
- }
- catch (InterruptedException e) {
- }
- }
- }
- }
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