Read Field
Apache Commons Lang 3.0 is a java library with lot of utilities and reusable components.
This requires the library commons-lang3-3.0.1.jar to be in classpath.
The following example shows using FieldUtils.readField() API.
It returns the value of named field by considering the specified class and its super classes.
package com.bethecoder.tutorials.commons_lang.common; public class Student extends Person { private static String DEFAULT_NAME = "Unknown" ; private String name; private int age; private String hobby; public Student () { } public Student ( String name, int age, String hobby ) { super () ; this .name = name; this .age = age; this .hobby = hobby; } public String getName () { return name; } public void setName ( String name ) { this .name = name; } public int getAge () { return age; } public void setAge ( int age ) { this .age = age; } public String getHobby () { return hobby; } public void setHobby ( String hobby ) { this .hobby = hobby; } public String toString () { return "Student[name = " + name + ", age = " + age + ", hobby = " + hobby + "]" ; } }
package com.bethecoder.tutorials.commons_lang.tests.reflections; import org.apache.commons.lang3.reflect.FieldUtils; import com.bethecoder.tutorials.commons_lang.common.Student; public class ReadFieldTest { /** * @param args * @throws IllegalAccessException * @throws IllegalAccessException */ public static void main ( String [] args ) throws IllegalAccessException { Student std = new Student ( "Sriram" , 2 , "Chess" ) ; String name = ( String ) FieldUtils.readField ( std, "name" , true ) ; System.out.println ( name ) ; Integer age = ( Integer ) FieldUtils.readField ( std, "age" , true ) ; System.out.println ( age ) ; } }
Sriram
2
