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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. public static void main (String[] args) throws java.lang.Exception
  11. {
  12. String foo = "A\"B";
  13. System.out.println(foo.replaceAll("\"", "\\\""));
  14. System.out.println(foo.replaceAll("\"", "\\\\\""));
  15. System.out.println(foo.replace("\"", "\\\""));
  16. }
  17. }
Success #stdin #stdout 0.07s 380160KB
stdin
Standard input is empty
stdout
A"B
A\"B
A\"B