How to use the this keyword

• Since Java implicitly uses the this keyword for instance variables and methods, you don't need to explicitly code it unless a parameter has the same name as an instance variable.
• If you use the this keyword to call another constructor, the statement must be the first statement in the constructor.

The syntax for using the this keyword

this.variableName  				// refers to an instance variable of the current object
this(argumentList);				// calls another constructor of the same class
this.methodName(argumentList)  // calls a method of the current object
objectName.methodName(this)    // passes the current object to a method
ClassName.methodName(this)    // passes the current object to a static method

How to refer to instance variables with the this keyword

public Product(String code, String description,
double price)
{
    this.code = code;
    this.description = description;
    this.price = price;
}

How to refer to methods

    public String getFormattedPrice()
    {
        NumberFormat currency = NumberFormat.getCurrencyInstance();
        return currency.format(this.getPrice);
    }

How to call a constructor using the this keyword

public Product()
{
    this("", "", 0.0);
}

How to send the current object to a method

public void print()
{
    System.out.println(this);
}

How to send the current object to a static method

public void save()
{
    ProductDB.saveProduct(this);
}