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¢Ù¼Ì³ÐTimerTask£¬ÖØÐ´run·½·¨
package bamboo.task;
import java.util.TimerTask;
public class TimeTaskTest extends TimerTask{
@Override
public void run() {
System.out.println("hi");
}
}
¢Úͨ¹ýtimerÀ´ÉèÖÃij¸öʱ¼äÀ´µ÷Ó㬻òÕßÊÇÏà¸ô¶à³¤Ê±¼äµ÷ÓÃ
package bamboo.test;
import java.util.Date;
import java.util.Timer;
import bamboo.task.TimeTaskTest;
public class TimeTest {
static TimeTaskTest test=new TimeTaskTest();
public static void main(String [] args){
Timer timer=new Timer();
//Æô¶¯ºÍ¼ä¸ôµÄʱ¼ä 1000ºÁÃë
//timer.schedule(test,0,1000);
//ÉèÖÃʲôʱºòÖ´ÐÐ
//timer.schedule(test, new Date());
}
}
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Object Ordering
A List l may be sorted as follows.
Collections.sort(l);
If the List consists of String elements, it will be sorted into alphabetical order. If it consists of Date elements, it will be sorted into chronological order. How does this happen? String and Date both implement the Compara ......
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