Java 反射之方法调用_调用fragment中的反射方法-优快云博客

本文通过具体实例演示了Java反射API的使用方法，包括获取类的所有公共方法、声明的方法、调用方法以及调用私有方法等内容。通过这些操作，读者可以深入理解Java反射机制的应用。

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package com.reflect;

import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.TypeVariable;

public class TestMethod
{
	/**
	 * 
	 * @param args
	 */
	public static void testGetMethods()
	{
		try
		{
			Class c=Class.forName("com.entity.Student");
			Method[] methods=c.getMethods();
			for(Method method:methods)
			{
				System.out.println(method.getModifiers());
				System.out.println(method.getName());
			}
		} catch (ClassNotFoundException e)
		{
			e.printStackTrace();
		} 
	}
	public static void testGetDeclaredMethods()
	{
		try
		{
			Class c=Class.forName("com.entity.Student");
			Method[] methods=c.getDeclaredMethods();
			for(Method method:methods)
			{
				System.out.println(method.getModifiers());
				System.out.println(method.getName());
			}
		} catch (ClassNotFoundException e)
		{
			e.printStackTrace();
		} 
	}
	public static void testInvoke()
	{
		try
		{
			Class c=Class.forName("com.entity.Student");
			Object obj=c.newInstance();
			Method method=c.getMethod("setName",new Class[]{String.class});
			method.invoke(obj,new Object[]{"王浩"});
			
			method=c.getMethod("getName",null);
			System.out.println(method.invoke(obj, null));
			

		} catch (Exception e)
		{
			e.printStackTrace();
		} 
	}
	
	public static void testInvokePrivate()
	{
		try
		{
			Class c=Class.forName("com.entity.Student");
			Object obj=c.newInstance();
			
			Method method=c.getDeclaredMethod("getHello",null);
			method.setAccessible(true);
			System.out.println(method.invoke(obj, null));
			

		} catch (Exception e)
		{
			e.printStackTrace();
		} 
	}
	public static void main(String[] args)
	{
		testInvokePrivate();
	}
}





package com.entity;

public class Student
{
	private String name;
	private int age;
	
	public Student()
	{
		super();
		System.out.println("student");
	}
	public Student(String name, int age)
	{
		super();
		this.name = name;
		this.age = age;
		System.out.println(this.name+","+this.age);
	}
	public String getName()
	{
		return name;
	}
	public void setName(String name)
	{
		this.name = name;
	}
	public int getAge()
	{
		return age;
	}
	public void setAge(int age)
	{
		this.age = age;
	}
	
	private String getHello()
	{
		return "hello";
	}
	
}

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