使用ReentrantLock实现两个线程交替打印
实现字母在前数字在后
iOS开发学习之iOS多线程和RunLoop 中文WORD版
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iOS多线程编程对于iOS开发初学者来说，总是会觉得很难理解和掌握，现在通过几个实例来更加系统全面的理解iOS多线程编程，希望对大家有所帮助。 有些程序是一条直线，起点到终点；有些程序是一个圆，不断循环，直到将它切断。直线的如简单的Hello World，运行打印完,它的生命周期便结束了，像昙花一现那样；圆如操作系统，一直运行直到你关机。 一个运行着的程序就是一个进程或者叫做一个任务，一个进程至少包含一个线程，线程就是程序的执行流。Mac和iOS中的程序启动，创建好一个进程的同时，一个线程便开始运行，
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package com.study.pattern;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class Demo2 {
private static Lock lock = new ReentrantLock();
private static Condition c1 = lock.newCondition();
private static Condition c2 = lock.newCondition();
private static CountDownLatch count = new CountDownLatch(1);
public static void main(String[] args) {
String c = "ABCDEFGHI";
char[] ca = c.toCharArray();
String n = "123456789";
char[] na = n.toCharArray();
Thread t1 = new Thread(() -> {
try {
lock.lock();
count.countDown();
for(char caa : ca) {
c1.signal();
System.out.print(caa);
c2.await();
}
c1.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
});
Thread t2 = new Thread(() -> {
try {
count.await();
lock.lock();
for(char naa : na) {
c2.signal();
System.out.print(naa);
c1.await();
}
c2.signal();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
lock.unlock();
}
});
t1.start();
t2.start();
}
}最后输出结果：
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使用LinkedTransferQueue实现两个线程交替打印
实现字母在前数字在后
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package com.study.pattern;
import java.util.concurrent.LinkedTransferQueue;
public class Demo3 {
private static LinkedTransferQueue linkedC = new LinkedTransferQueue();
private static LinkedTransferQueue linkedN = new LinkedTransferQueue();
public static void main(String[] args) {
String c = "ABCDEFGHI";
char[] ca = c.toCharArray();
String n = "123456789";
char[] na = n.toCharArray();
Thread t1 = new Thread(() -> {
for(char caa : ca) {
try {
linkedC.put(caa);
char a = linkedN.take();
System.out.print(a);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
Thread t2 = new Thread(() -> {
for(char naa : na) {
try {
char b = linkedC.take();
System.out.print(b);
linkedN.put(naa);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
t1.start();
t2.start();
}
} 输出结果：
使用synchronized实现两个线程交替打印
实现字母在前数字在后
立即学习“Java免费学习笔记（深入）”；
package com.study.pattern;
import java.util.concurrent.CountDownLatch;
public class Demo4 {
private static CountDownLatch count = new CountDownLatch(1);
public static void main(String[] args) {
String c = "ABCDEFGHI";
char[] ca = c.toCharArray();
String n = "123456789";
char[] na = n.toCharArray();
Object lock = new Object();
Thread t1 = new Thread(() -> {
synchronized (lock) {
count.countDown();
for(char caa : ca) {
System.out.print(caa);
lock.notify();
try {
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
lock.notify();
}
});
Thread t2 = new Thread(() -> {
try {
count.await();
} catch (InterruptedException e) {
e.printStackTrace();
}
synchronized (lock) {
for(char naa : na) {
System.out.print(naa);
lock.notify();
try {
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
lock.notify();
}
});
t1.start();
t2.start();
}
}输出结果：
使用LockSupport实现两个线程交替打印
实现字母在前数字在后
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package com.study.pattern;
import java.util.concurrent.locks.LockSupport;
public class Demo5 {
private static Thread t1;
private static Thread t2;
public static void main(String[] args) {
String c = "ABCDEFGHI";
char[] ca = c.toCharArray();
String n = "123456789";
char[] na = n.toCharArray();
t1 = new Thread(() -> {
for(char caa : ca) {
System.out.print(caa);
LockSupport.unpark(t2);
LockSupport.park();
}
});
t2 = new Thread(() -> {
for(char naa : na) {
LockSupport.park();
System.out.print(naa);
LockSupport.unpark(t1);
}
});
t1.start();
t2.start();
}
}输出结果：
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