JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: Example for static block.


Description:

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.


Code:
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();
	}
}

Output:
[one, two, three, four]
<< Previous Program | Next Program >>

List Of All Static Keyword Programs:

  1. Example for static variables and methods.
  2. Example for static block.
  3. Example for static block vs constructor.
  4. Example for singleton class using static block.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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