In java, there are various uses of static keyword few of them you can see with example.
static variable :
It is used in java for a single copy in class.
Example :
package com.pkjavacode.com;
/**
*
* @author pradeep
*/
public class StaticExample {
static String company = "Infosys Limited";
String name;
String id;
long salary;
public StaticExample(String name, String id, long salary) {
this.name = name;
this.id = id;
this.salary = salary;
}
public static void main(String arg[]) {
StaticExample se = new StaticExample("Pradeep Yadav", "IL981243", 40000);
System.out.println("Employee Name :" + se.name + "\nEmployee Id :" + se.id + "\nEmployee Salary :" + se.salary + "\nCompany Name :" + company);
}
}
Output :
Employee Name :Pradeep Yadav
Employee Id :IL981243
Employee Salary :40000
Company Name :Infosys Limited
—————————————————————–
static block :
When you need to print something before main method called used static block of code.
Example :
package com.pkjavacode.com;
/**
*
* @author pradeep
*/
public class StaticExample {
static String company = "Infosys Limited";
String name;
String id;
long salary;
public StaticExample(String name, String id, long salary) {
this.name = name;
this.id = id;
this.salary = salary;
}
public static void main(String arg[]) {
StaticExample se = new StaticExample("Pradeep Yadav", "IL981243", 40000);
System.out.println("Employee Name :" + se.name + "\nEmployee Id :" + se.id + "\nEmployee Salary :" + se.salary + "\nCompany Name :" + company);
}
static {
System.out.println("Excellent work by this employee");
//You can also add some logic here!!
}
}
Output :
Excellent work by this employee
Employee Name :Pradeep Yadav
Employee Id :IL981243
Employee Salary :40000
Company Name :Infosys Limited
——————————————————————
Nested static class :
Through nested static class you can define a class within a class and can access their member.
Example :
package com.pkjavacode.com;
/**
*
* @author pradeep
*/
public class StaticExample {
public static void main(String arg[]) {
StaticDemo sd = new StaticDemo();
sd.display();
}
static class StaticDemo {
//Can add some method and variable here!!
void display() {
System.out.println("Nested static class method");
}
}
}
Output :
Nested static class method
—————————————————————————————————-
static method :
When you need to access a method without creating class object used static keyword in method signature.
Example :
package com.pkjavacode.com;
/**
*
* @author pradeep
*/
public class StaticExample {
public static void show() {
System.out.println("static method print");
}
public static void main(String arg[]) {
StaticExample.show();
}
}
Output :
static method print
pk java tutorials 