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  1. import java.util.*;
  2. import java.util.regex.*;
  3.  
  4. class Demo {
  5.     static public void main(String[] args) {
  6.         String lock = "O_2_^-^";
  7.         String str = " O_2_^-^ ";
  8.  
  9.         System.out.println(str);
  10.         System.out.println(lock);
  11.         System.out.println(str.contains(lock));
  12.         str = str.replaceFirst(Pattern.quote(lock), "");
  13.         System.out.println("|" + str + "|");
  14.     }
  15. }
  16.  
Success #stdin #stdout 0.07s 380224KB
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stdin
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Standard input is empty
stdout
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 O_2_^-^ 
O_2_^-^
true
|  |
https://ideone.com/4Iyoii
language:
Java (12.0.1)
created:
10 years ago
visibility:
secret

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