java刷题-3

总结

用一个变量来控制流转

1、https://leetcode.cn/problems/fizz-buzz-multithreaded/submissions/

class FizzBuzz {

    private int n;

    private volatile int printType ;// 0 3 5 15 


    public FizzBuzz(int n) {
        this.n = n;
        printType = 0;

    }

    // printFizz.run() outputs "fizz".
    public void fizz(Runnable printFizz) throws InterruptedException {
       
        for(int i=3;i<=n;i+=3) {
            if(i%15 == 0) {
                continue;
            }
            while(printType != 3) {
                Thread.yield();
            }
            printFizz.run();
            printType = 0;
            
        }
        
    }

    // printBuzz.run() outputs "buzz".
    public void buzz(Runnable printBuzz) throws InterruptedException {

          for(int i=5;i<=n;i+=5) {

            if(i%15 == 0) {
                continue;
            }
            while(printType != 5) {
                Thread.yield();
            }
            
            printBuzz.run();
            printType = 0;
            
        }
        
         
        
    }

    // printFizzBuzz.run() outputs "fizzbuzz".
    public void fizzbuzz(Runnable printFizzBuzz) throws InterruptedException {
        for(int i=15;i<=n;i+=15) {
            while(printType != 15) {
                Thread.yield();
            }
            printFizzBuzz.run();
            printType = 0;
            
        }
        
        
    }

    // printNumber.accept(x) outputs "x", where x is an integer.
    public void number(IntConsumer printNumber) throws InterruptedException {

        for(int i = 1; i<=n; i++) {
             while(printType != 0) {
                Thread.yield();
            }
            if (i%15== 0) {
                 printType = 15;
            } else if (i%3 == 0) {
                printType = 3;
            } else if (i%5==0) {
                 printType = 5;
            } else {
                printNumber.accept(i);
            }
        }
        
    }
}