How to find the access modifier of a member using java reflection

Question

Find the access modifier of a member using java reflection

private final static long serialId = 1L;
protected String title;
public String FirstName;

Answer 1

For all fields in the class (assuming class is named theClass)

Field[] fields = theClass.getDeclaredFields();
for (Field field : fields) {
    int modifers = field.getModifiers();
    if (Modifier.isPrivate(modifers)) {
        System.out.println(field.getName() + " is Private");
    }
}

The following methods determine could also be used:

boolean isPrivate(Field field){
    int modifers = field.getModifiers();
    return Modifier.isPrivate(modifers);
}

boolean isProtected(Field field){
    int modifers = field.getModifiers();
    return Modifier.isPublic(modifers);
}

boolean isPublic(Field field){
    int modifers = field.getModifiers();
    return Modifier.isProtected(modifers);
}

Example usage (given a class called theClass)

Field titleField = theClass.getField("title");
boolean titleIsProtected = isProtected(titleField);