《编程之美》读书笔记（一）：让CPU占用率画直线和正弦曲线（Java实现）

public class CPUTest {

//定义时间片大小（毫秒）
public static final double TIME = 1000;
//画直线方法
private static void lineGraph(double rate) throws InterruptedException{
while (true){
doSomeSimpleWork(rate * TIME);
Thread.sleep((long) (TIME - rate * TIME));
}
}
//画正弦曲线方法
private static void sinGraph() throws InterruptedException{
double x = 0;
double y = 0;
while (true){
y = (Math.sin(x) + 1) * TIME / 2;
doSomeSimpleWork(y);
x += 0.1;
Thread.sleep((long) (TIME - y));
}
}
//占用CPU方法
private static void doSomeSimpleWork(double time) {
long startTime = System.currentTimeMillis();
while ((System.currentTimeMillis() - startTime) < time) {
}
}

/**
* @param args the command line arguments
*/
public static void main(String[] args) throws InterruptedException {
lineGraph(0.5);
//sinGraph();
}

}