Several ways to get class in Java

Take Hello.class as an example

 Public class Hello {    publicstaticvoid  main (string[] args) {        // TODO auto-generated Method stub        System.out.println ("tes22t2");          for (String Arg:args)        {            System.out.println ("Hello Proms:" + arg);     }}}

1. Reflection

 Public Static voidMain (string[] args)throwsException {args=Newstring[]{"Hello", "Java Madness handout W"}; String Progclass= Args[0]; String[] Progargs=NewString[args.length-1]; System.arraycopy (args,1, Progargs, 0, progargs.length);//url[] urls = {new URL ("File:")};//class<?> clazz = (new URLClassLoader (URLs)). LoadClass (Progclass);        class<?> clazz = Class.forName (Progclass); //get the main method of the class you want to runMethod main = Clazz.getmethod ("Main", (NewString[0]). GetClass ()); Object[] Argsarray={Progargs}; Main.invoke (NULL, Argsarray); }

2.URLClassLoader

url[] URLs = {new URL ("File:")}; Class<?> clazz = (new URLClassLoader (URLs)). LoadClass (Progclass);

3.loadClass

Compileclassloader CCL = new Compileclassloader ();//Load the class to be run class<?> clazz = Ccl.loadclass (Progclass);

4. Overwrite Findclass

Reference

java8--class loading mechanism and reflection (Java Madness Handout 3 Review notes)

Several ways to get class in Java