如何使用正则表达式或子字符串从字符串中提取文本？

Question

What I'm doing now is this:

if (textforspeech.contains("upload completed"))
                                {
                                    String varr = textforspeech.substring(17,3);
                                    String varr1 = textforspeech.substring(0, 16);
                                    String varr2 = textforspeech.substring(21);

But my program crash on the first substring 17,3

The text in the textforspeech is: "upload completed 100 0" The number 100 present percentages and will be all the time 100. And the number 0 present seconds it can be changed sometimes 0 sometimes 1 and sometimes 34.5

In varr I need to put the 100 as string "100"
In varr1 "upload completed"
in varr2 "0"

Only varr2 might be change in the next times could be "1" or "45.5" Before I added the seconds to the string textforspeech it was only:

"upload completed 100" so I could make substring(17) and substring(0,16) But now I added the seconds after the 100 so how can extract it all to the three vars ?

Answer 1

You can do something like this:

string[] parts = textforspeech.split(new char[] { ' ' });

string varr = parts[2]; // "100"
string varr1 = string.format("{0} {1}", parts[0], parts[1]);  // "upload completed"
string varr2 = parts[3]; // value