window.ENTITIES={'/api/snippets/java/java%20check%20if%20string%20only%20contains%20numbers%20using%20regex':[{"result":true,"message":null,"batch":{"type":"java","name":"java check if string only contains numbers using regex","items":[{"id":"pqnRej","type":"java","name":"Java check if string only contains numbers using regex","content":"import java.util.regex.Matcher;\nimport java.util.regex.Pattern;\n\npublic class Example {\n\n    public static void main(String[] args) {\n        String numbers = \"1234\";\n        String text = \"ABC\";\n\n        String regex = \"^[0-9]+$\";  // regex to check if string contains only digits\n        Pattern pattern = Pattern.compile(regex);  // compiles the regex\n\n        // find match between given string and pattern\n        Matcher matcherNumbers = pattern.matcher(numbers);\n        Matcher matcherText = pattern.matcher(text);\n\n        // return true if the string matched the regex\n        Boolean numbersMatches = matcherNumbers.matches();\n        Boolean textMatches = matcherText.matches();\n\n        System.out.println(numbersMatches); // true\n        System.out.println(textMatches);    // false\n    }\n}","source":"https://dirask.com/posts/Java-check-if-string-only-contains-numbers-DWr3O1?posts-list=oVp2x3","author":{"id":"V0lPb0","name":"Kourtney-White","avatar":"1629058893303__V0lPb0__w40px_h40px.jpg","points":635,"role":"BASIC"},"creationTime":1634658865000,"updateTime":null,"removalTime":null}]}}]};