java - how to format string as my expectation in android? -


suppose have string that

string s= " %k%%m%r%";

now want string formatted as

"k%m%r"

means white spaces removed beginning , end point, if starts or ends % % removed , in middle if % remains sequentially more 1 reduced 1 %.

how can that?

string pattern = "(%+)"; string exclude = "(^%*)|(%*$)"; string candidate = "%k%%%m%%%%%r%"; system.out.println(candidate.trim().replaceall(exclude,"").replaceall(pattern, "%"));

produce: k%m%r


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