What is Java Regex to check "=2245" or "= 545" or "= 22", etc? -

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ok, want check if string has = first character & followed number, if there space between = & number ok.

ok, here example,

string s="=2245"; --> return true string s="=   545"; --> return true string s="= 22"; --> return true string s="= m  545"; --> return false string s="=m545"; --> return false

so here did

if(s.matches("=[0-9]+")){    return true; }

this work if there not space between = & number

so changed to:

if(s.matches("=\\s[0-9]+")){        return true; }

then work if there 1 space between = & number & won't work in other cases.

so how fix it?

"=\\s*\\d+"

the * means "zero or more repetitions", work if spaces there or not. \d alternative way write [0-9].


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