Example usage for java.lang Class getDeclaredField

Introduction

In this page you can find the example usage for java.lang Class getDeclaredField.

Prototype

@CallerSensitive
public Field getDeclaredField(String name) throws NoSuchFieldException, SecurityException

Source Link

Document

Returns a Field object that reflects the specified declared field of the class or interface represented by this Class object.

Usage

From source file:Main.java

public static Object invokeField(Class<?> cls, Object object, String fieldName) throws Exception {
    Field field = cls.getDeclaredField(fieldName);

    boolean accessible = field.isAccessible();
    try {/* ww  w  .  j  av a  2 s  . c  om*/
        field.setAccessible(true);
        return field.get(object);
    } finally {
        field.setAccessible(accessible);
    }
}

From source file:Main.java

private static void setField(Object obj, Class<?> cls, String field, Object value) {
    try {//from w w w  . java  2  s . c  o  m
        Field localField = cls.getDeclaredField(field);
        localField.setAccessible(true);
        localField.set(obj, value);
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static int getFieldIntSafely(Class clz, String fieldName, Object instance) {
    try {//from  w w  w  .j  ava  2  s  .  c  om
        Field field = clz.getDeclaredField(fieldName);
        field.setAccessible(true);
        return field.getInt(instance);
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    }
    return 0;
}

From source file:Main.java

public static void setField(Class cls, String name, Object obj, Object value) {
    try {/*from   w ww.  j a  v a 2 s . c om*/
        Field nameField = cls.getDeclaredField(name);
        nameField.setAccessible(true);
        nameField.set(obj, value);
    } catch (Exception e) {
        e.printStackTrace();
    }
}

From source file:Main.java

public static Object getFieldValue(Class<?> fieldClass, String fieldName, Object instance) {
    try {//w  ww. j  a v  a  2  s.co  m
        Field e = fieldClass.getDeclaredField(fieldName);
        e.setAccessible(true);
        return e.get(instance);
    } catch (Exception var4) {
        var4.printStackTrace();
        return null;
    }
}

From source file:Main.java

@SuppressWarnings("rawtypes")
public static Object getFieldObject(Object target, Class clazz, String fieldName) {
    try {//from  www.  j a  v  a 2  s . c  o m
        Field field = clazz.getDeclaredField(fieldName);
        if (!field.isAccessible()) {
            field.setAccessible(true);
        }
        return field.get(target);
    } catch (SecurityException e) {
        e.printStackTrace();
    } catch (NoSuchFieldException e) {
        e.printStackTrace();
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    }
    return null;

}

From source file:Main.java

public static Field getField(Class<?> klass, String member) throws NoSuchFieldException {
    try {/* w w w  .j  a va  2s  .com*/
        return klass.getDeclaredField(member);
    } catch (NoSuchFieldException e) {
        if (klass.getSuperclass() != null)
            return getField(klass.getSuperclass(), member);
        else
            throw new NoSuchFieldException(String.format("Class does not contain member %s!", member));
    }
}

From source file:Main.java

/**
 * Get the private field data value of the given instance of a class
 * //from   www. j  av  a 2  s.  com
 * @param objectInstance Object to get private member data from
 * @param fieldName Name of private member to get data from
 * @return Private member's data
 * 
 * @throws NoSuchFieldException
 * @throws IllegalArgumentException
 * @throws IllegalAccessException
 */
public static Object getPrivateField(Object objectInstance, String fieldName)
        throws NoSuchFieldException, IllegalArgumentException, IllegalAccessException // NOSONAR
{
    Class<? extends Object> clazz = objectInstance.getClass();

    Field field = clazz.getDeclaredField(fieldName);

    field.setAccessible(true);

    return field.get(objectInstance);
}

From source file:Main.java

/**
 * Set the private field data value of the given instance of a class
 * /*from w  w w  .  j ava 2s .  c om*/
 * @param objectInstance Object to set private member data to
 * @param fieldName Name of private member to set data for
 * @param value Private member's data to set
 * 
 * @throws NoSuchFieldException
 * @throws IllegalArgumentException
 * @throws IllegalAccessException
 */
public static void setPrivateField(Object objectInstance, String fieldName, Object value)
        throws NoSuchFieldException, IllegalArgumentException, IllegalAccessException // NOSONAR
{
    Class<? extends Object> clazz = objectInstance.getClass();

    Field field = clazz.getDeclaredField(fieldName);

    field.setAccessible(true);

    field.set(objectInstance, value);
}

From source file:Main.java

private static void injectClassField(Class clazz, String fieldStr, long newValue) {
    try {/*w w  w .j a  v  a2s  .  c  o m*/
        final Field field = clazz.getDeclaredField(fieldStr);
        if (field != null) {
            field.setAccessible(true);
            Object obj = null;
            field.set(obj, newValue);
        }
    } catch (Exception e) {
        Log.d("REFLECTION", clazz.getSimpleName() + " injection failed for field: " + fieldStr);
    }
}