Java Field getType()用法及代码示例

java.lang.reflect.Field的getType()方法用于获取此Field对象表示的字段的声明类型。此方法返回一个Class对象，该对象标识声明的类型

用法:

public String getType()

参数：此方法不接受任何内容。

返回值：此方法返回一个Class对象，该对象标识声明的类型。

以下示例程序旨在说明getType()方法：
示例1:

// Java program to demonstrate getType() 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 getType Method on User Object 
        // to get the Type of Marks field 
        Class value = field.getType(); 
  
        // print result 
        System.out.println("Type"
                           + " is " + value); 
  
        // Now Get the Fees field object 
        field = User.class.getField("Fees"); 
  
        // Apply getType Method on User Object 
        // to get the Type of Fees field 
        value = field.getType(); 
  
        // print result 
        System.out.println("Type"
                           + " is " + value); 
    } 
} 
  
// sample User class 
class User { 
  
    // static double values 
    public static double Marks = 34.13; 
    public static float Fees = 3413.99f; 
  
    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; 
    } 
}

输出：

Type is double
Type is float

示例2:

// Java program to demonstrate getType() 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].getType()); 
        } 
    } 
}

输出：

Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month
Name of Field: class java.time.Month

参考文献： https://docs.oracle.com/javase/8/docs/api/java/lang/reflect/Field.html#getType–

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注：本文由纯净天空筛选整理自AmanSingh2210大神的英文原创作品 Field getType() method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。