how to check if string contains character

Question

I want to check if my string contains  a   character I tried following code  s   ddjdjdj kfkfkf    if s contains           String parts     s split          s   parts 0      i want to strip part after         but it doesnot give expected result Any idea

User · Answer

is simpler        String s    ddjdjdj kfkfkf        if s contains                      String parts     s split                 s    parts 0      i want to strip part after              System out println s

User · Answer

You need this instead   if s contains         contains   method of String class does not take regular expression as a parameter  it takes normal text     EDIT   String s    ddjdjdj kfkfkf    if s contains             String parts     s split             System out print parts 0        OUTPUT   ddjdjdj

User · Answer

Why not just   int plusIndex   s indexOf       if  plusIndex    -1        String before   s substring 0  plusIndex          Use before     It s not really clear why your original version didn t work  but then you didn t say what actually happened  If you want to split not using regular expressions  I d personally use Guava   Iterable lt String gt  bits   Splitter on      split s   String firstPart   Iterables getFirst bits         If you re going to use split  either the built-in version or Guava  you don t need to check whether it contains   first - if it doesn t there ll only be one result anyway  Obviously there s a question of efficiency  but it s simpler code      Calling split unconditionally String   parts   s split         s   parts 0     Note that writing String   parts is preferred over String parts   - it s much more idiomatic Java code

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