为了演示系统中多线程的运作，写了一个简单的测试CPU多线程处理代码。
TestCPU.java，代码如下：
public class TestCPU implements Runnable {
public static void main(String[] args) {
Thread a = new Thread(new TestCPU(), "a");
Thread b = new Thread(new TestCPU(), "b");
a.start();
b.start();
}
public void run() {
long i = 0;
while (true) {
i++;
System.out.println(Thread.currentThread().getId() + ": " + i);
}
}
}
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