Java reflection get index of array1/13/2024 The most generic method to set a field value is set (Object obj, Object value): it takes as first argument the object on which the field needs to be set, and as second argument the value for the field. Then find the mutator (which accepts an argument of the field's type) Finally execute the mutator on the object with the new value: Field field=classHandle.getDeclaredField("firstName") Method setter=classHandle.getMethod("setFirstName", field.getType()) setter.invoke(myObject, "new value for first name") share. Because such access usually violates the design intentions of the class, it should be used with the utmost discretion. This is typically done only in special circumstances when setting the values in the usual way is not possible. Given an instance of a class, it is possible to use reflection to set the values of fields in that class. Getting and setting Field value Field.get() and t() methods can be used get and set value of field respectively. If you already know name of the fields you want to access, you can use cl.getField(String fieldName) to get Field object. If the field is static, the obj argument is ignored it may be null Otherwise, the underlying field is an instance field. The new value is automatically unwrapped if the underlying field has a primitive type. The set () method of is used to set the value of the field represented by this Field object on the specified object argument to the specified new value passed as parameter. In this quick tutorial, we'll discuss how can we set the values of fields from a different class in Java by using the Reflection API. However, there can be scenarios when we need to set the values of fields, such as in some libraries where we don't have access to the fields.
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