[npa]

"i want to swap two integers without creating a temp one":
(oldest trick in the book, but i like it)

int a = 4, b = 6;
a = a ^ b;
b = a ^ b;
a = a ^ b;

"i want to run a class without using 'static void main(String[] args)'":

class Okay {
	static {
		System.out.println("Hello static world.");
		System.exit(0);
	}
}

"i want to call a method with the string vesion of its name":

import java.lang.reflect.*;
class RefTest {

	public static void main(String[] args){
		RefTest reftest		= new RefTest();
		reftest.doit();
	}

	public void doit(){
		String methodToCall = "reflectionTest";
		Method mymethod;
		try {
			mymethod = getClass().getDeclaredMethod(methodToCall, null);
			mymethod.invoke(this, null);
		} catch(Exception e){
			System.err.println("oops:" + e);
		}
	}


	public void reflectionTest(){
		System.out.println("Called");
	}
}