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布满荆棘的人生 2022-10-20 13:49 184阅读 0赞

import java.util.concurrent.locks.ReentrantLock;
    
    public class PrintTest {
        private static ReentrantLock lock = new ReentrantLock();
        private static int state = 0;
    
        static class ThreadA extends Thread {
            @Override
            public void run() {
                for (int i = 0; i < 26; ) {
                    lock.lock();
                    try {
                        while (state % 2 == 1) {
                            state++;
                            System.out.print((char)('A'+i));
                            i++;
                        }
                    } catch (Exception e) {
                        throw e;
                    } finally {
                        lock.unlock();
                    }
                }
    
            }
        }
    
        static class ThreadB extends Thread {
            @Override
            public void run() {
                for (int i = 0; i < 100; ) {
                    lock.lock();
                    try {
    
                        while (state % 2 == 0) {
                            state++;
                            System.out.print(i+1);
                            i++;
                        }
    
                    } catch (Exception e) {
                        throw e;
                    } finally {
                        lock.unlock();
                    }
                }
            }
        }
    
        public static void main(String[] args) {
            ThreadA threadA = new ThreadA();
            threadA.start();
    
            ThreadB threadB = new ThreadB();
            threadB.start();
        }
    
    
    }