The public keyword in Java programming language
In this tutorial, we will learn about The public keyword in java programming language
public is a keyword and an access modifier In the Java programming language. It is used for member’s to access as public. This keyword can be used to define a class, a method or a variable.
when a class is marked as public, it can be accessed from out side classes.
Public class
Syntax
the syntax of the public keyword in java when defining the class
<access modifier> <class> <class_name>{
}
Example
public class student{
}
when a method is marked as public, it can be executed from anywhere. Execution is possible from the own class and other classes.
Public method
Syntax
the syntax of the public keyword in java when defining the method
<access modifier> <Variable_type> <method_name>();
Example
public int run();
// this is the public method. It can be invoked from within the class and other classes.
When a variable is marked as public, it can be used and accessed from enclosing class and outside classes.
public variable
Syntax
syntax of public keyword in java when define variable
<access modifier> <Variable_type> <variable_name>;
Example
public String stu_name;
// this is public variable. It can be invoked from witin class and other classes.
The following code example shows a public class patient which has a public method move () and public variable disease.
public class Patient{ //public class
public string disease; //public variable
public void move(){ //public method
}
}
Example
class pub_key{
public void message(){
System.out.println("Welcome to java");
}
}
//save by pub_key.java
public class pub_use{
public static void main(String args[]){
pub_key obj=new pub_key();
obj.message();
}
}
When this code is executed, it produced the following result
welcome to Java
There are other Java language keywords that are similar to this keyword
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