Field中的set()方法
时间: 2024-03-12 10:50:14 浏览: 9
Field中的set()方法是用于设置该Field的值的方法。在Java中,一个Field的值可以通过调用它的set()方法来进行设置。该方法需要传入一个参数,表示要设置的值。
例如,如果有一个名为age的Field,可以使用以下代码设置其值:
```
age.set(18);
```
在这个例子中,我们将age的值设置为18。注意,set()方法只能用于非final的Field。如果Field被声明为final,那么它的值无法被改变,也就无法使用set()方法。
相关问题
QWizard的setField方法
QWizard 类允许你创建多步向导窗口。setField 方法允许你设置向导窗口中的一个字段的值。
用法:
```
void QWizard::setField(const QString &name, const QVariant &value)
```
参数:
- `name`:要设置的字段的名称。
- `value`:要设置的值。
例子:
```
QWizard wizard;
wizard.setField("userName", "John Smith");
```
在这个例子中,我们创建了一个向导窗口,然后使用 setField 方法设置一个名为 "userName" 的字段的值为 "John Smith"。
django field set
A field set in Django is a way to group together related fields in a form. It allows you to organize the fields in a more logical and user-friendly way, making it easier for users to understand and complete the form.
To define a field set in Django, you can use the "fieldsets" attribute in your model admin class. This attribute takes a list of tuples, where each tuple represents a field set. Each tuple contains two elements: the title of the field set and a dictionary of fields to include in the set.
Here's an example of how to define a field set in a model admin class:
```
from django.contrib import admin
from .models import MyModel
class MyModelAdmin(admin.ModelAdmin):
fieldsets = (
('Main Info', {
'fields': ('name', 'description', 'image')
}),
('Optional Info', {
'fields': ('category', 'price', 'is_featured'),
'classes': ('collapse',),
}),
)
admin.site.register(MyModel, MyModelAdmin)
```
In this example, we define two field sets: "Main Info" and "Optional Info". The "Main Info" set includes the fields "name", "description", and "image". The "Optional Info" set includes the fields "category", "price", and "is_featured", and has a CSS class of "collapse" to make it collapsible by default.
When you view the form in the Django admin, the fields will be grouped into the specified field sets, making it easier to read and fill out the form.