Hướng dẫn sử dụng Maven cho người mới bắt đầu

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.o7planning</groupId>
   <artifactId>HelloMaven</artifactId>
   <version>0.0.1-SNAPSHOT</version>
</project>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.o7planning</groupId>
   <artifactId>HelloMaven</artifactId>
   <version>0.0.1-SNAPSHOT</version>

   <dependencies>
       <dependency>
           <groupId>org.apache.commons</groupId>
           <artifactId>commons-lang3</artifactId>
           <version>3.3.2</version>
       </dependency>
   </dependencies>
   
</project>

package org.o7planning.tutorial.hellomaven;

import org.apache.commons.lang3.StringUtils;

public class CheckNumeric {

  public static void main(String[] args) {
      String text1 = "0123a4";
      String text2 = "01234";
     
      boolean result1 = StringUtils.isNumeric(text1);
      boolean result2 = StringUtils.isNumeric(text2);

      System.out.println(text1 + " is a numeric? " + result1);
      System.out.println(text2 + " is a numeric? " + result2);

  }

}