通过反射调用方法和操作属性

 Student类：

package com.java1234;

public class Student {

	private int id;
	private int age;
	private String name;
	
	
	public Student() {
		super();
		// TODO Auto-generated constructor stub
	}
	
	public Student(int id, int age, String name) {
		super();
		this.id = id;
		this.age = age;
		this.name = name;
	}

	
	public Student(int age, String name) {
		super();
		this.age = age;
		this.name = name;
	}

	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	
	public void print() {
		System.out.println("我的年龄是"+age);
	}
	@Override
	public String toString() {
		return "Student [id=" + id + ", age=" + age + ", name=" + name + "]";
	}
	
}

 通过反射，调用invoke方法来调用相应的方法：

测试类：

package com.java1234;

import java.lang.reflect.Method;

public class Test1 {

	public static void main(String[] args) {
		Class<?> c=null;
	try {
		c=Class.forName("com.java1234.Student");
		System.out.println(c.getName());
	} catch (ClassNotFoundException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	try {
		Object obj=c.newInstance();
		Method m1=obj.getClass().getMethod("setName",String.class);
		m1.invoke(obj, "张飞");
		Method m2=obj.getClass().getMethod("getName");
		String name=(String)m2.invoke(obj);
		System.out.println(name);
	} catch (Exception e) {
		e.printStackTrace();
	}
		}
}

运行结果：