import java.util.concurrent.atomic.AtomicInteger;
public class ThreadWork {
private static final Object locks = new Object();
private static AtomicInteger threadCount = new AtomicInteger(4);
public void startTest() {
new Thread(new TestRunnable()).start();
new Thread(new TestRunnable()).start();
new Thread(new TestRunnable()).start();
new Thread(new TestRunnable()).start();
}
static class TestRunnable implements Runnable {
@Override
public void run() {
int i = 100;
while (i > 0) {
synchronized (locks) {
i -= 20;
try {
System.out.println("输出值:" + i + " 打印线程名:" + Thread.currentThread().getName());
} catch (Exception e) {
e.printStackTrace();
}
threadCount.decrementAndGet();
if (threadCount.get() == 0) {
threadCount.set(4);
locks.notifyAll();
} else {
try {
locks.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
}
}
"C:\Program Files\Java\jdk1.8.0_201\bin\java.exe" "-javaagent:D:\Program Files\JetBrains\IntelliJ IDEA 2020.2.1\lib\idea_rt.jar=57732:D:\Program Files\JetBrains\IntelliJ IDEA 2020.2.1\bin" -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_201\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_201\jre\lib\rt.jar;C:\Users\Administrator\IdeaProjects\Decompilation\out\production\Decompilation" MainIn
输出值:80 打印线程名:Thread-0
输出值:80 打印线程名:Thread-2
输出值:80 打印线程名:Thread-3
输出值:80 打印线程名:Thread-1
输出值:60 打印线程名:Thread-1
输出值:60 打印线程名:Thread-3
输出值:60 打印线程名:Thread-2
输出值:60 打印线程名:Thread-0
输出值:40 打印线程名:Thread-0
输出值:40 打印线程名:Thread-2
输出值:40 打印线程名:Thread-3
输出值:40 打印线程名:Thread-1
输出值:20 打印线程名:Thread-1
输出值:20 打印线程名:Thread-3
输出值:20 打印线程名:Thread-2
输出值:20 打印线程名:Thread-0
输出值:0 打印线程名:Thread-0
输出值:0 打印线程名:Thread-2
输出值:0 打印线程名:Thread-3
输出值:0 打印线程名:Thread-1
