JAVA

classes and objects in java

Remember from the Java Syntax chapter 
that a class should always start with an uppercase first letter, 
and that the name of the java file should match the class name.

java class

//	Example : TestClass (Can be predefined or user-defined)
public class TestClass {
  // properties
  private int id = 111;
  
  // constructor
  public TestClass(){
    super();
  }
  
  // method
  public void test(){
    // some code here
  }
}

using class in java

public class HelloWorld {
  public static void main(String[] args) {
   
   
   class Number{
   
   	int number;
   
   	public boolean isPos(){
   		if(number > 0){
   			return true;
   		} else {
   			return false;
   		}
   		
   	}
   }
   
   Number myNumber = new Number();
   
   myNumber.number = 7;
   
   if(myNumber.isPos()){
   	System.out.println(myNumber.number + " is positive!!!");
   } else {
   	System.out.println(myNumber.number + " is not positive!!!");
   }
   
  }
}

object class of java

// Default behavior of toString() is to print class name, then
// @, then unsigned hexadecimal representation of the hash code
// of the object

public String toString()
{
    return getClass().getName() + "@" + Integer.toHexString(hashCode());
}

java class

java faker class

using class in java

class Number {
    	
    	int number;
    	
    	// square numbers
    	public boolean isSquare(){
    		
    		double squareRoot = Math.sqrt(number);
    		
    		
    		if(squareRoot == Math.floor(squareRoot))
    		{
    			return true;
    		} else {
    			return false;
    		}
    		
    	}
    	
    	// triangular numbers
    	public boolean isTriangular(){
    		
    		int x = 1;
    		
    		int triangularNumber = 1;
    		
    		while(triangularNumber < number){
    			
    			x++;
    			triangularNumber = triangularNumber + x;
    			
    		}
    		
    		if(triangularNumber == number){
    			return true;
    		} else {
    			return false;
    		}
    	}
    }
    
    // testing 
    Number myNumber = new Number();
    myNumber.number = 16;
    
    System.out.println(myNumber.isSquare());

object class java

The Object class is the parent class of all the classes in java by default.In 
other words, it is the topmost class of java.
The Object class is beneficial if you want to refer any object whose type you 
dont know. Notice that parent class reference variable can refer the child 
class object, know as upcasting.

java classes and objects

class Dog {
    int age = 5;

    public static void main(String[]args) {

        Dog myObj = new Dog();
        System.out.println(myObj.age);
    }
}

class in java

A class  
  — is a template used to create objects and to define object data types and methods.
  Classes are categories, and objects are items within each category. 
  All class objects should have the basic class properties.

class syntax in java

class <className> 
 { 
 public: 
     (public member data and functions go here) 
 private:
     (private member data and functions go here) 

 };

Java Class

class Sprite2 {
    constructor({position}) {
        this.position = position;
        this.height = 0;
        this.width = 0;
    }

    draw() {}

    update() {
        this.draw();
    }
}