java通过反射调用方法，java反射调用方法,下面代码演示如何通过反射

java通过反射调用方法，java反射调用方法,下面代码演示如何通过反射

下面代码演示如何通过反射调用方法。

首先通过Class实例的getDeclaredMethods()获得所有方法的定义，然后通过Method的invoke方法触发方法调用，invoke方法的第一个参数是方法所属对象，第二个参数是方法调用的参数列表。

import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;/** * * @author byrx.net */public class Main {    /**     * Invokes the methods of an object using the Reflection api.     */    public void invokeMethodsUsingReflection() {        //Obtain the Class instance        Class computerClass = Computer.class;        //Get the methods        Method[] methods = computerClass.getDeclaredMethods();        //Create the object that we want to invoke the methods on        Computer computer = new Computer();        //Loop through the methods and invoke them        for (Method method : methods) {            Object result;            try {                //Call the method. Since none of them takes arguments we just                //pass an empty array as second parameter.                result = method.invoke(computer, new Object[0]);            } catch (IllegalArgumentException ex) {                ex.printStackTrace();                return;            } catch (InvocationTargetException ex) {                ex.printStackTrace();                return;            } catch (IllegalAccessException ex) {                ex.printStackTrace();                return;            }            System.out.println(method.getName() + ": " + result);        }    }    /**     * @param args the command line arguments     */    public static void main(String[] args) {        new Main().invokeMethodsUsingReflection();    }    class Computer {        private String brand = "DELL";        private String type = "Laptop";        private int harddiskSize_GB = 300;        private boolean AntiVirusInstalled = true;        public String getBrand() {            return brand;        }        public String getType() {            return type;        }        public int getHarddiskSize_GB() {            return harddiskSize_GB;        }        public boolean isAntiVirusInstalled() {            return AntiVirusInstalled;        }    }}

上面代码将输出：

getBrand: DELLgetHarddiskSize_GB: 300isAntiVirusInstalled: truegetType: Laptop