Tutorial 15: Static Methods and Static Blocks in Java

Tutorial 15: Static Methods and Static Blocks in Java

Code for this tutorial:

MainStaticDemo.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package StaticDemo;

/**
 *
 * @author Ankit
 */
public class MainStaticDemo {
    static{
        System.out.println("I am before main....");
    }
   
    //javac MainStatic.java
    //java MainStatic
    public static void main(String[] args) {
       
        StaticVariables.iNo1 = 0;
        StaticVariables o1 = new StaticVariables();
        StaticVariables o2 = new StaticVariables();
           
       
        //o1 has its own iNo2;
        //o2 has its own iNo2;
       
        o1.iNo2 = 10;
        o2.iNo2 = 20;
       
        //o1 and o2 shares iNo1; /// static
       
        System.out.println("o1's no2 is:"+o1.iNo2);
        System.out.println("o2's no2 is:"+o2.iNo2);
        System.out.println("iNo1 is:"+StaticVariables.iNo1);
       
       
        StaticVariables.callMeStatic();
       
       
       
               
    }
}

StaticVariables,java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package StaticDemo;

/**
 *
 * @author Ankit
 */
public class StaticVariables {
    static int iNo1;
    int iNo2;

    public StaticVariables() {
        iNo1++;
    }
   
    public static void callMeStatic(){
        System.out.println("I am from static method of class StaticVari.");
    }
   
}