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Java reflection get set private field value

The java.lang.Class provides the methods to examine the runtime properties of the object including its members and type information. For every type of object, the JVM instantiates an immutable instance of java.lang.Class. Using reflection, we can get the metadata of a class at run time.

The get() and set() method are used to get and set public field value in java.

Note: We have to turn off the java access check for field modifiers.


package com.codesjava;
public class TestClass {
	private int testField = 20;

package com.codesjava;
import java.lang.reflect.Field;
public class ReflectionTest {
	public static void main(String args[]){
		try {
			TestClass testClass = new TestClass();
			Class c=Class.forName("com.codesjava.TestClass");  
			Field field = c.getDeclaredField("testField");
			field.setInt(testClass, 50);
		} catch (Exception e) {


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