Java 中的 Field getName()方法，带示例
原文:https://www . geesforgeks . org/field-getname-method-in-Java-with-examples/
java.lang.reflect.Field 的 getName() 方法用于获取该 Field 对象所表示的字段的名称。当一个类包含一个字段，并且我们想要得到那个字段的名称，那么我们可以使用这个方法返回字段的名称。
语法:
public String getName()
参数:此方法不接受任何内容。
返回值:这个方法返回一个字符串，这是基础成员的简单名称。
以下程序说明 getName()方法: 程序 1:
// Java program to demonstrate getName() method
import java.lang.reflect.Field;
public class GFG {
public static void main(String[] args)
throws Exception
{
// Get the marks field object
Field field = User.class
.getField("Marks");
// Apply getName Method on User Object
// to get the name of Marks field
String value = field.getName();
// print result
System.out.println("Name"
+ " is " + value);
// Now Get the Fees field object
field = User.class.getField("Fees");
// Apply getName Method on User Object
// to get the name of Fees field
value = field.getName();
// print result
System.out.println("Name"
+ " is " + value);
// Now Get the name field object
field = User.class.getField("name");
// Apply getName Method on User Object
// to get the name of name field
value = field.getName();
// print result
System.out.println("Name"
+ " is " + value);
}
}
// sample User class
class User {
// static double values
public static double Marks = 34.13;
public static float Fees = 3413.99f;
public static String name = "Aman";
public static double getMarks()
{
return Marks;
}
public static void setMarks(double marks)
{
Marks = marks;
}
public static float getFees()
{
return Fees;
}
public static void setFees(float fees)
{
Fees = fees;
}
public static String getName()
{
return name;
}
public static void setName(String name)
{
User.name = name;
}
}
Output:
Name is Marks
Name is Fees
Name is name
程序 2:
// Java program to demonstrate getName() method
import java.lang.reflect.Field;
import java.time.Month;
public class GFG {
public static void main(String[] args)
throws Exception
{
// Get all field objects of Month class
Field[] fields = Month.class.getFields();
for (int i = 0; i < fields.length; i++) {
// print name of Fields
System.out.println("Name of Field:"
+ fields[i].getName());
}
}
}
Output:
Name of Field:JANUARY
Name of Field:FEBRUARY
Name of Field:MARCH
Name of Field:APRIL
Name of Field:MAY
Name of Field:JUNE
Name of Field:JULY
Name of Field:AUGUST
Name of Field:SEPTEMBER
Name of Field:OCTOBER
Name of Field:NOVEMBER
Name of Field:DECEMBER
参考文献:
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