Program: Example for static block.

Static blocks are nothing but a normal block of code, enclosed in braces { }, preceded with static keyword. These static blocks will be called when JVM loads the class into memory. Incase a class has multiple static blocks across the class, then JVM combines all these blocks as a single block of code and executes it. Static blocks will be called only once, when it is loaded into memory. These are also called initialization blocks.

package com.java2novice.staticexmp;

import java.util.ArrayList;
import java.util.List;

public class MyStaticBlock {

	private static List<String> list;
	
	static{
		//created required instances
		//create ur in-memory objects here
		list = new ArrayList<String>();
		list.add("one");
		list.add("two");
		list.add("three");
		list.add("four");
	}
	
	public void testList(){
		System.out.println(list);
	}
	
	public static void main(String a[]){
		MyStaticBlock msb = new MyStaticBlock();
		msb.testList();
	}
}

[one, two, three, four]