1195.交替打印字符串.java

import java.util.concurrent.Semaphore;
import java.util.function.IntConsumer;

/*
 * @lc app=leetcode.cn id=1195 lang=java
 *
 * [1195] 交替打印字符串
 */

// @lc code=start
class FizzBuzz {
    private int n;

    Semaphore number = new Semaphore(1);
    Semaphore fizz = new Semaphore(0);
    Semaphore buzz = new Semaphore(0);
    Semaphore fizzbuzz = new Semaphore(0);


    public FizzBuzz(int n) {
        this.n = n;
    }

    // printFizz.run() outputs "fizz".
    public void fizz(Runnable printFizz) throws InterruptedException {
        for(int i = 1;i <= n;++i){
            if(i % 3 == 0 && i % 5 != 0){
                fizz.acquire();
                printFizz.run();
                number.release();
            }
        }
    }

    // printBuzz.run() outputs "buzz".
    public void buzz(Runnable printBuzz) throws InterruptedException {
        for(int i = 1;i <= n;++i){
            if(i % 5 == 0 && i % 3 != 0){
                buzz.acquire();
                printBuzz.run();
                number.release();
            }
        }
    }

    // printFizzBuzz.run() outputs "fizzbuzz".
    public void fizzbuzz(Runnable printFizzBuzz) throws InterruptedException {
        for(int i = 1;i <= n;++i){
            if(i % 3 == 0 && i % 5 == 0){
                fizzbuzz.acquire();
                printFizzBuzz.run();
                number.release();
            }
        }
    }

    // printNumber.accept(x) outputs "x", where x is an integer.
    public void number(IntConsumer printNumber) throws InterruptedException {
        for(int i = 1;i <= n;++i){
            number.acquire();
            if(i % 3 != 0 && i % 5 !=0){
                printNumber.accept(i);
                number.release();
            }else if(i % 3 == 0 && i % 5 == 0){
                fizzbuzz.release();
            }else if(i % 3 == 0){
                fizz.release();
            }else{
                buzz.release();
            }
        }
    }
}
// @lc code=end