java编程 反射类的使用

使用反射类调用该类方法：

package com.robert.reflect; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; public class InvokerTest { public int add(int a, int b) { return a + b; } public String echo(String str) { return "echo " + str; } public static void main(String[] args) { Class classType = InvokerTest.class; try { // Object invokerTest = classType.newInstance(); Object invokerTest = classType.getConstructor(new Class[]{}).newInstance(new Object[]{}); Method addMethod = classType.getMethod("add", new Class[]{int.class,int.class}); Object result = addMethod.invoke(invokerTest, new Object[]{100,200}); System.out.println(result.toString()); Method echoMethod = classType.getMethod("echo", new Class[]{String.class}); Object echoResult = echoMethod.invoke(invokerTest, new Object[]{"hello world"}); System.out.println(echoResult.toString()); } catch (InstantiationException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (SecurityException e) { e.printStackTrace(); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (IllegalArgumentException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } } }

注明：该代码转自浪曦视频。仅供学习和参考。如有问题，本人qq362601125