1. Block<\/p>\n
2. Variable (also known as a class variable)<\/p>\n
3. Method (also known as a class method)<\/p>\n
4. Class<\/p>\n
Static Block in Java<\/h3>\n
A static block initializes the static variables. It executes whenever the class is loaded in memory. One class can have numerous static blocks, which will be executed in the same sequence in which they are written.<\/p>\n
Example of Static Block in Java-<\/strong><\/p>\n Output-<\/strong><\/p>\n Any variable that is declared using the \u2018static\u2019 keyword is static. Memory allocation for a static variable happens only once in the class area when the class is loaded into memory. It is also known as a class variable. It is common to all the objects of the class.<\/p>\n In this, a single copy of a static variable is created and shared among all the objects of the class.<\/p>\n Example of Static Variable in Java-<\/strong><\/p>\n Output-<\/strong><\/p>\n Static methods in Java<\/strong><\/em> belong to classes; unlike other classes, it doesn’t belong to the instance of the class. This method can be accessible to every instance, but the methods defined in the instance are only accessed by that member of the class. It can access only static data.<\/p>\n 1. These are declared with the keyword “static” when defining a method<\/p>\n 2. This method belongs to the class and not to the object.<\/p>\n 3. It can access only static data. It can not access instance variables.<\/p>\n 4. A static method can call only static methods; non-static methods are not called by a static method.<\/p>\n 5. Static methods in Java are accessed by using the method name with the (.) dot operator and the class name.<\/p>\n Example of Java Static Methods-<\/strong><\/p>\npackage com.dataflair.statickeyword;\r\npublic class StaticBlock \r\n{\r\n static String sentence;\r\n static int number;\r\n static\r\n {\r\n sentence = \"Welcome to DataFlair\";\r\n number = 69;\r\n }\r\n public static void main(String args[])\r\n {\r\n System.out.println(sentence);\r\n System.out.println(\"Value of Integer: \"+number);\r\n }\r\n}<\/pre>\n![\"Java](\"https:\/\/data-flair.training\/blogs\/wp-content\/uploads\/sites\/2\/2018\/06\/Example-of-static-block-in-java.jpg\")
<\/a><\/p>\nStatic Variable in Java<\/h3>\n
package com.dataflair.statickeyword;\r\nclass Employee\r\n { \r\n int empId; \r\n String empName; \r\n static String companyName = \"TCS\"; \r\n \/\/constructor to initialize the variable \r\n Employee(int id, String name){ \r\n empId = id; \r\n empName = name; \r\n } \r\n \/\/method to display values \r\n void display()\r\n {\r\n System.out.println(empId+\" \"+empName+\" \"+companyName);\r\n } \r\n} \r\n\/\/class to create and display the values of object \r\npublic class StaticVariable \r\n{ \r\n public static void main(String args[])\r\n { \r\n Employee EmployeeObj = new Employee(218,\"Kushal\"); \r\n Employee EmployeeObj1 = new Employee(635,\"Bhumika\"); \r\n Employee EmployeeObj2 = new Employee(147,\"Renuka\"); \r\n \/\/calling display method \r\n EmployeeObj.display(); \r\n EmployeeObj1.display(); \r\n EmployeeObj2.display(); \r\n } \r\n}<\/pre>\n<\/a><\/p>\nStatic Methods in Java<\/h3>\n
\/\/Java Program to demonstrate the use of a static method.\r\npackage com.dataflair.staticmethod;\r\nclass Employee\r\n{ \r\n int empId; \r\n String empName; \r\n static String companyName = \"TCS\"; \r\n \/\/static method to valueChange the value of static variable \r\n static void valueChange()\r\n { \r\n companyName = \"DataFlair\"; \r\n } \r\n \/\/constructor to initialize the variable \r\n Employee(int id, String name){ \r\n empId = id; \r\n empName = name; \r\n } \r\n\/\/method to display values \r\nvoid display()\r\n {\r\n System.out.println(empId+\" \"+empName+\" \"+companyName);\r\n } \r\n} \r\n\/\/class to create and display the values of object \r\npublic class Demo \r\n{ \r\n public static void main(String args[])\r\n { \r\n Employee.valueChange();\/\/calling valueChange method \r\n \/\/creating objects \r\n Employee EmployeeObj = new Employee(218,\"Kushal\"); \r\n Employee EmployeeObj1 = new Employee(635,\"Bhumika\"); \r\n Employee EmployeeObj2 = new Employee(147,\"Renuka\"); \r\n \/\/calling display method \r\n EmployeeObj.display(); \r\n EmployeeObj1.display(); \r\n EmployeeObj2.display(); \r\n } \r\n}<\/pre>\n