public class demo2
{
    public static void main(String[] args)
    {
        String text="fang xing is no one";
             int count=0;
        int index=0;
        if(index!=-1)
        {
            count=count+1;
            index=text.indexOf(' ',index);
            index+=1;    
        }
        System.out.println(count + "," + index);
         }
}
为什么count的结果会是1？？？？

{
            count=count+1; //count ＝ 0+1
            index=text.indexOf(' ',index);
            index+=1;   
        }
为什么不等于 1 ？

count=count+1;
就执行了一次
你想他等于几？！


你是不是想把if改成while？

那不死循环了。

public static void main(String[] args)
    {
        String text="fang xing is no one";
        int count=0;
        int index=0;
        int locate=0;
        while(index!=-1)
        {
            index=text.indexOf(' ',locate);
            count++;
            if(index!=-1)
                System.out.println(count + "," + (index+1));
            locate=index+1;
        }
    }

1,5
2,10
3,13
4,16