All about Java programming

/** @author Ryome */
/**All about Java programming (encapsulation, inheritance, polymorphism, interface, overload, override,
 *List / try-catch / exception / Javadoc)*/
package superHello;

import java.util.Arrays;
class HelloException extends Exception{private static final long serialVersionUID=1L;HelloException(String m){super(m);}}
interface SuperHelloWorld {public abstract String SuperHello() throws HelloException;}
abstract class Hello implements SuperHelloWorld{final String HELLO="Helloworld";private String hello;
Hello(){this.hello=HELLO;}Hello(String hello){this.hello=hello;}public abstract String SuperHello() throws HelloException;
public String getHello(){return hello;}}
class HelloWorld extends Hello {HelloWorld(){super();}@Override public String SuperHello() throws HelloException{return getHello();}}
public class HelloJava{
    /**main method@param args not used*/
	public static void main(String[] args){
		try {Arrays.asList(new HelloWorld().SuperHello()).forEach(System.out::println);}catch(HelloException e){}finally{}
	}
}

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