java面试题系列2

package read;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;

public class Test {

public static void main(String[] args){

//final BlockingQueue<String> queue = new ArrayBlockingQueue<String>(16);
final BlockingQueue<String> queue = new ArrayBlockingQueue<String>(1);

for(int i = 0; i < 4; i++){
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
String log = queue.take();
parseLog(log);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}).start();
}

System.out.println("begin:"+(System.currentTimeMillis()/1000));
/*模拟处理16行日志，下面的代码产生了16个日志对象，当前代码需要运行16秒才能打印完这些日志。
修改程序代码，开四个线程让这16个对象在4秒钟打完。
*/
for(int i=0;i<16;i++){ //这行代码不能改动
final String log = ""+(i+1);//这行代码不能改动
{
try {
queue.put(log);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// Test.parseLog(log);
}
}
}

//parseLog方法内部的代码不能改动
public static void parseLog(String log){
System.out.println(log+":"+(System.currentTimeMillis()/1000));

try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}

}