Java String split Regex

Question

I have a string    String str    a   b - c   d   e  lt  f  gt  g  gt   h  lt   i    j     I want to split the string on all of the operators  but include the operators in the array  so the resulting array looks like    a       b   -   c       d       e    lt    f    gt    g    gt     h    lt     i        j    I ve got this currently   public static void main String   args        String str    a   b - c   d   e  lt  f  gt  g  gt   h  lt   i    j       String reg        lt    lt    gt                -  lt   gt             lt    gt                -  lt   gt                String   res   str split reg       System out println Arrays toString res        This is pretty close  it gives     a       b   -   c       d       e    lt    f    gt    g    gt       h    lt       i          j    Is there something I can do to this to make the multiple character operators appear in the array like I want them to   And as a secondary question that isn t nearly as important  is there a way in the regex to trim the whitespace off from around the letters

User · Accepted Answer

String   ops   str split    s  a-zA-Z    s     String   notops   str split    s   a-zA-Z    s     String   res   new String ops length notops length-1   for int i 0  i lt res length  i    res i    i 2  0   notops i 2    ops i 2 1     This should do it  Everything nicely stored in res

User · Answer

str split        res27  Array java lang String    Array a     b  -  c     d     e   lt   f   gt   g   gt    h   lt    i      j

User · Answer

You could also do something like   String str    a   b - c   d   e  lt  f  gt  g  gt   h  lt   i    j   String   arr   str split     lt    G   w      w       lt    gt             -   lt   gt           s       It handles white spaces and words of variable length and produces the array    a     b  -  c     d     e   lt   f   gt   g   gt    h   lt    i      j

User · Answer

Can you invert your regex so split by the non operation characters   String ops     string split   a-z       ops        -         lt    gt    gt     lt              This obviously doesn t return the variables in the array  Maybe you can interleave two splits  one by the operators  one by the variables

User · Answer

String str    a   b - c   d   e  lt  f  gt  g  gt   h  lt   i    j       String reg      s  a-zA-Z          String   res   str split reg       for  String out   res            if      equals out                 System out print out                     Output     -      lt        lt

User · Answer

You could split on a word boundary with  b

[java] Java String.split() Regex

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