CODEWITHSUNDEEP
javaregex
tnaser
tnaser

Reputation: 181

java regex extract until special char

String str = "Text0TEXT1.more text ";
String str = "Text0TEXT1(more text ";
String str = "Text0TEXT1{more text ";

If I have a line that it end could be several chars such as . or ( or { or ; how can I extract TEXT1 only ?

Update: There is Text 0 before text 1 and the special char may or may not exist

Update 2

String str = "Beginning text Text I want . Text I don't want"
String str = "Beginning text with numbers Text I want ( Text I don't want )"
String str = "Beginning text with numbers Text I want { Text I don't want }"

I need to extract "Text I want" but I get the rest of the text till the end . Special characters are . ( { :

Upvotes: 2

Views: 2639

Answers (3)

Toto
Toto

Reputation: 91385

How about:

^(?:[a-zA-Z ]+[0-9]+ )?([a-zA-Z ,]+)

The text you want is in group 1.

explanation:

^                 : begining of string
  (?:             : start non capture group
    [a-zA-Z ]+    : one or more letter or space
    [0-9]+        : one or more digit
                  : a space
  )?              : end of group optional
  (               : start capture group 1
    [a-zA-Z ,]+   : one or more letter, sapce or coma
  )               : end of group

Upvotes: 3

Bogdan Emil Mariesan
Bogdan Emil Mariesan

Reputation: 5647

I've setup a simple example that will solve your regex by using positive lookahead matching regex:

[\w ]+(?=[.{(;])

The regex above will extract the part before the special characters.

Edit:

For the TEXT0 part is there a specific pattern for it?

Upvotes: 0

Alex
Alex

Reputation: 11090

str.split("[^\\w\\s]+")[0]

This will match all consecutive [a-zA-Z_0-9] characters and whitespaces from the beginning of the line

List<String> str = new ArrayList<String>();
str.add("TEXT1.more text ");
str.add("TEXT1)more text ");
str.add("TEXT1}more text ");
str.add("Beginning text Text I want . Text I don't want");
str.add("Beginning text with numbers Text I want ( Text I don't want )");
str.add("Beginning text with numbers Text I want { Text I don't want }");
for(String s : str)
    System.out.println("input: [" + s + "], first word: " + s.split("[^\\w\\s]+")[0]);

produces:

input: [TEXT1.more text ], first word: TEXT1
input: [TEXT1)more text ], first word: TEXT1
input: [TEXT1}more text ], first word: TEXT1
input: [Beginning text Text I want . Text I don't want], first word: Beginning text Text I want 
input: [Beginning text with numbers Text I want ( Text I don't want )], first word: Beginning text with numbers Text I want 
input: [Beginning text with numbers Text I want { Text I don't want }], first word: Beginning text with numbers Text I want

Upvotes: 0

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