check have string have just numbers
String numbers = "6969696969";
boolean check_n = numbers.matches("[0-9]+"); // true
String notNumber = "0123meowGOGO88l";
boolean check_s = notNumber.matches("[0-9]+"); // falsecheck have string have just numbers
String numbers = "6969696969";
boolean check_n = numbers.matches("[0-9]+"); // true
String notNumber = "0123meowGOGO88l";
boolean check_s = notNumber.matches("[0-9]+"); // falseCopyright © 2021 Codeinu
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