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[Java] string.replaceAll() isn't working....

 
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manc
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PostPosted: Thu May 03, 2012 10:06 am    Post subject: [Java] string.replaceAll() isn't working.... Reply with quote
Code:
       String s = " 4 . 5 3 2 ";
      s = s.replaceAll("\\s+","");
      //s = s.replaceAll(" ", ""); //alternative
      System.out.println(s);

Prints 4.532

Yet
Code:

          s[i] = s[i].replaceAll("\\s+","");
          s[i] = s[i].replaceAll(" ", ""); // alternative doesnt work either
          System.out.println(s[i]);
          


where S[i] = " 4 . 5 3 2 ". it still prints out 4 . 5 3 2 , not 4.532 like it should...

Any ideas why? My sanity is on the line here Crying or Very sad
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661089799107
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Posts: 186
PostPosted: Thu May 03, 2012 12:00 pm    Post subject: Reply with quote
Works fine for me.

Code:

String[] s = new String[] {" 4 . 5 3 2 "};
      
s[0] = s[0].replaceAll("\\s+","");
       
System.out.println(s[0]);


Output: 4.532
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manc
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PostPosted: Thu May 03, 2012 1:00 pm    Post subject: Reply with quote
String [] s = { "4 . 5 6", "2. 6 8", "3 . 6 3", .....} and so on which I got by .split() ing a larger string into those individual strings).
Then I'm passing s into a function:

public static double myFuncccction(String[] s, int low, int high){

for(int i = low; i<high; i++){
System.out.println(s[i]);
g[i] = s[i].trim(); //optional
g[i] = s[i].replaceAll("\\s+","");
g[i] = s[i].replaceAll(" ", "");
System.out.println(s[i]);

}

I just want the strings to be "4.56" and so on, without white spaces, so I can convert them to a double for other uses.


However it prints out the same before and after the call to .replaceAll()
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661089799107
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PostPosted: Thu May 03, 2012 2:13 pm    Post subject: Reply with quote
manc wrote:
String [] s = { "4 . 5 6", "2. 6 8", "3 . 6 3", .....} and so on which I got by .split() ing a larger string into those individual strings).
Then I'm passing s into a function:

public static double myFuncccction(String[] s, int low, int high){

for(int i = low; i<high; i++){
System.out.println(s[i]);
g[i] = s[i].trim(); //optional
g[i] = s[i].replaceAll("\\s+","");
g[i] = s[i].replaceAll(" ", "");
System.out.println(s[i]);

}

I just want the strings to be "4.56" and so on, without white spaces, so I can convert them to a double for other uses.


However it prints out the same before and after the call to .replaceAll()


What is 'g'? You are outputting 's'.
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manc
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Joined: 16 Jun 2006
Posts: 551
PostPosted: Thu May 03, 2012 2:19 pm    Post subject: Reply with quote
Blacknight wrote:
manc wrote:
String [] s = { "4 . 5 6", "2. 6 8", "3 . 6 3", .....} and so on which I got by .split() ing a larger string into those individual strings).
Then I'm passing s into a function:

public static double myFuncccction(String[] s, int low, int high){

for(int i = low; i<high; i++){
System.out.println(s[i]);
g[i] = s[i].trim(); //optional
g[i] = s[i].replaceAll("\\s+","");
g[i] = s[i].replaceAll(" ", "");
System.out.println(s[i]);

}

I just want the strings to be "4.56" and so on, without white spaces, so I can convert them to a double for other uses.


However it prints out the same before and after the call to .replaceAll()


What is 'g'? You are outputting 's'.


just an accident, they should be s's
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661089799107
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PostPosted: Thu May 03, 2012 2:53 pm    Post subject: Reply with quote
Again it works perfectly fine.

Code:

   public static double myFuncccction(String[] s, int low, int high) {
      for(int i = low; i < high; i++) {
         System.out.println(s[i]);
         s[i] = s[i].trim(); //optional
         s[i] = s[i].replaceAll("\\s+","");
         s[i] = s[i].replaceAll(" ", "");
         System.out.println(s[i]);
      }
      
      return 0.0d;
   }


Code:

      String [] s = { "4 . 5 6", "2. 6 8", "3 . 6 3"};
      
      myFuncccction(s, 0, s.length);


Output:

Code:

4 . 5 6
4.56
2. 6 8
2.68
3 . 6 3
3.63
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