Java method to determine whether String type can be converted to int

Using regular expressions is more efficient

 public boolean canParseInt(String str){if(str == null){ //Verify whether it is empty return false;}return str.matches("//d+"); //Use regular expression to determine whether the string is a number. The first / is an escape character, /d+ means matching 1 or // multiple consecutive numbers, "+" is similar to "*", "*" means 0 or more}

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