两个线程一个输出字母,一个输出数字,交替输出A1B2C3D4E5F6G7。

第一种方式:

import java.util.concurrent.CountDownLatch;

public class ConcurrentTest {
    private static CountDownLatch latch= new CountDownLatch(1);

    public static void main(String[] args) {
        final Object o = new Object();
        char[] number = "1234567".toCharArray();
        char[] letter = "ABCDEFG".toCharArray();
        new Thread(() -> {
            try {
                latch.await();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (o) {
                for (char c : number) {
                    System.out.print(c);
                    try {
                        o.notify();
                        o.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                o.notify();
            }
        }, "t1").start();

        new Thread(() -> {
            synchronized (o) {
                for (char c : letter) {
                    System.out.print(c);
                    latch.countDown();
                    try {
                        o.notify();
                        o.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                o.notify();
            }
        }, "t2").start();
    }
}

第二种方式:
import java.util.concurrent.CountDownLatch;

public class ConcurrentTest {
    private static volatile boolean task = false;

    public static void main(String[] args) {
        final Object o = new Object();
        char[] number = "1234567".toCharArray();
        char[] letter = "ABCDEFG".toCharArray();
        new Thread(() -> {
            synchronized (o) {
                while (!task) {
                    try {
                        o.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                for (char c : number) {
                    System.out.print(c);
                    try {
                        o.notify();
                        o.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                o.notify();
            }
        }, "t1").start();

        new Thread(() -> {
            synchronized (o) {
                for (char c : letter) {
                    System.out.print(c);
                    task = true;
                    try {
                        o.notify();
                        o.wait();
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                }
                o.notify();
            }
        }, "t2").start();
    }
}

第三种方式:
import java.util.concurrent.locks.LockSupport;

public class ConcurrentTest {
    static Thread t1 = null, t2 = null;

    public static void main(String[] args) {
        char[] number = "1234567".toCharArray();
        char[] letter = "ABCDEFG".toCharArray();
        t1 = new Thread(() -> {
            for (char c : number) {
                LockSupport.park();
                System.out.print(c);
                LockSupport.unpark(t2);

            }
        }, "t1");

        t2 = new Thread(() -> {
            for (char c : letter) {
                System.out.print(c);
                LockSupport.unpark(t1);
                LockSupport.park();
            }
        }, "t2");
        t1.start();
        t2.start();
    }
}

第四种方式:

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class ConcurrentTest {
public static void main(String[] args) {
char[] number = "1234567".toCharArray();
char[] letter = "ABCDEFG".toCharArray();
Lock lock = new ReentrantLock();
Condition condition1 = lock.newCondition();
Condition condition2 = lock.newCondition();
new Thread(() -> {
try {
lock.lock();
condition1.await();
for (char c : number) {
System.out.print(c);
condition2.signal();
condition1.await();
}
condition2.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}, "t1").start();

new Thread(() -> {
try {
lock.lock();
for (char c : letter) {
System.out.print(c);
condition1.signal();
condition2.await();
}
condition1.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
}, "t2").start();

}
}

 

posted @ 2020-06-08 11:32  蛋挞小子  阅读(638)  评论(0编辑  收藏  举报