Java Reflection: Load member method

Java Reflection: Load member method

Package Com.ma.reflection;import Java.lang.reflect.invocationtargetexception;import Java.lang.reflect.Method; Import Org.junit.test;import com.ma.bean.studentbean;/** * Reflection: Load Member Method * @author MA * */public class Demo3 {/** * Test no Parameter member method * @throws classnotfoundexception * @throws nosuchmethodexception * @throws SecurityException * @throws invocationtarget Exception * @throws illegalaccessexception * @throws illegalargumentexception */@Testpublic void Test1 () throws Classno Tfoundexception, SecurityException, Nosuchmethodexception, IllegalArgumentException, IllegalAccessException, invocationtargetexception{//Load class class<?> clazz = Class.forName ("Com.ma.bean.StudentBean");//Load method = Clazz.getmethod ("eat", null);//Call Method Method.invoke (new Studentbean (), null);} /** * Test the method of the participating member * @throws classnotfoundexception * @throws nosuchmethodexception * @throws SecurityException * @throws InvocationTargetException * @throws illegalaccessexception * @throws illegalargumentexception * * @Testpublic void Test2 () throws ClassNotFoundException, SecurityException, Nosuchmethodexception, IllegalArgumentException, illegalaccessexception, invocationtargetexception{//load class class<?> clazz = Class.forName ("Com.ma.bean.StudentBean");//Load Methods method = Clazz.getmethod ("Play", string.class,int.class);// Call Method Method.invoke (new Studentbean (), "Zhang San", 45);}  /** * Test Variable parameter member method * @throws classnotfoundexception * @throws nosuchmethodexception * @throws SecurityException * @throws InvocationTargetException * @throws illegalaccessexception * @throws illegalargumentexception */@Testpublic void test3 () throws ClassNotFoundException, SecurityException, Nosuchmethodexception, IllegalArgumentException, Illegalaccessexception, invocationtargetexception{//load class class<?> clazz = Class.forName (" Com.ma.bean.StudentBean ");//Load method = Clazz.getmethod (" Run ", int[].class);//Call Method Method.invoke (new Studentbean (), New int[]{1,2,3});} /** * Test Private Member Method * @throws classnotfoundexception * @throws NOsuchmethodexception * @throws SecurityException * @throws invocationtargetexception * @throws illegalaccessexception * @throws illegalargumentexception */@Testpublic void test4 () throws ClassNotFoundException, SecurityException, Nosuchmethodexception, IllegalArgumentException, illegalaccessexception, invocationtargetexception{//load class class< ?> clazz = Class.forName ("Com.ma.bean.StudentBean");//Load Methods method = Clazz.getdeclaredmethod ("jump", null);// Set Private method access rights method.setaccessible (TRUE);//Call Method Method.invoke (new Studentbean (), null);} /** * Test static Member Method * @throws classnotfoundexception * @throws nosuchmethodexception * @throws SecurityException * @throws I  Nvocationtargetexception * @throws illegalaccessexception * @throws illegalargumentexception */@Testpublic void Test5 () Throws ClassNotFoundException, SecurityException, Nosuchmethodexception, IllegalArgumentException, Illegalaccessexception, invocationtargetexception{//load class class<?> clazz = Class.forName ("Com.ma.bean.StUdentbean ");//Load Methods method = Clazz.getmethod (" Sleep ", int.class);//Call method, static method do not object can call method Method.invoke (NULL, 34) ;} /** * Main Method Test * @throws classnotfoundexception * @throws nosuchmethodexception * @throws SecurityException * @throws InvocationTargetException * @throws illegalaccessexception * @throws illegalargumentexception */@Testpublic void Test6 ( ) throws ClassNotFoundException, SecurityException, Nosuchmethodexception, IllegalArgumentException, Illegalaccessexception, InvocationTargetException {//load class class<?> Clazz = Class.forName (" Com.ma.bean.StudentBean ");//Load Methods method = Clazz.getmethod (" main ", string[].class);//Call Main method, static method do not object can call method , because the main method is to fold an array, there are two ways to call the Main method//First call//method.invoke (null, new object[]{new string[]{"AA", "BB"}});// The second invocation of Method.invoke (null, (Object) New string[]{"AA", "CC"});

Studentbean class

Package com.ma.bean;/** * Student class * @author MA * */public class Studentbean {public String name = "Liu Bei";p ublic int age;private String work = "Teacher";p rivate static String sex = "male";p ublic Studentbean () {super ();} public void Eat () {System.out.println ("Eat up ..."). ");} public void Play (String name,int age) {System.out.println (name+): Go play yo ... "+age);} public void run (int  ... intaa) {System.out.println (": This is a mutable parameter method");} private void Jump () {System.out.println ("This is Private Method");} public static void sleep (int age) {System.out.println (age+ ": This is a static method");} public static void Main (string[] args) {System.out.println ("This is the Main method!!! ");}}

　　

Java Reflection: Load member method