class TheredText
{
public static void main(String[] args)
{
  MyThread myThread=new MyThread();
  myThread.start();
}
}
class MyThread extends Thread
{
    MyThread(){};
int i=0;
boolean flag=true;
public void run()
{
   while(flag)
  {
       if(i<10000)
   {
     System.out.println("this is the input:" +i);
     i++;
      }
   else
    flag=false;
     }
}
}
输出结果为：
this is the input:9701
this is the input:9702
this is the input:9703
this is the input:9704
this is the input:9705
this is the input:9706
this is the input:9707
this is the input:9708
this is the input:9709
this is the input:9710
this is the input:9711
this is the input:9712
this is the input:9713
this is the input:9714
this is the input:9715
this is the input:9716
this is the input:9717
this is the input:9718
this is the input:9719
this is the input:9720
this is the input:9721
this is the input:9722
this is the input:9723
this is the input:9724
this is the input:9725
问题一：为什么它的输出是从9701开始？

这只是计算机的运行速度太快，控制台只能容下那么多数据，当他运行的时候你可以强行终止，然后看下结果。this is the input:1949this is the input:1950
this is the input:1951
this is the input:1952
this is the input:1953
this is the input:1954
this is the input:1955
this is the input:1956
this is the input:1957
this is the input:1958
this is the input:1959
this is the input:1960
this is the input:1961
this is the input:1962
this is the input:1963
this is the input:1964
this is the input:1965
this is the input:1966
this is the input:1967
this is the input:1968
this is the input:1969
this is the input:1970
this is the input:1971
this is the input:1972

cmd 命令提示符窗口的最大显示行数为300，你的这行代码运行的同时，一直在滚动，上面的被都覆盖了。在eclipse里可以看的更多，但也只有从6666开始的。建议把while 中的循环次数减少，可以看的更直观一点。

是因为执行速度太快了，你没看到而已，你可以sleep一下就行了

输出是从0开始的
可以通过control+C控制线程结束的时机