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Thread: HOW TO USE THE OPERATOR "this" in JAVA(OOP)?

  1. #1
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    Exclamation HOW TO USE THE OPERATOR "this" in JAVA(OOP)?

    What is the purpose of this operator?
    What is this operator?
    Give me codes with "this" operator.
    When to use it?
    HELP ME WITH THIS!


  2. #2
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    Default Re: HOW TO USE THE OPERATOR "this" in JAVA(OOP)?

    The this operator is used to refer to the current context - in other words, the object that you are dealing with right now.

    Consider a class called Person that expects some parameters like name, age during instantiation, you can then set those properties by calling this.property = property_passed_in to the constructor.

    public Class Person{
        private String name;
        private int age;
     
        public Person(String name, int age){
            this.name = name;
            this.age = age;
        }
    }
    When the Person object is created, its properties name and age will be set. I hope this helps.

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    crys (August 29th, 2013)

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    Default Re: HOW TO USE THE OPERATOR "this" in JAVA(OOP)?

    Think of any dot-separated operators you add before a var name in the context of an ascending pyramid.

    If you have a method in a class, and you refer to x, that's x in the method.

    If you refer to this.x, that's the x in the class.

    If you refer to anotherClass.x, that's x in another class.

    No operators = closest x. Then comes this, then comes specifying where this "x" you speak of is.

    -s45

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    Default Re: HOW TO USE THE OPERATOR "this" in JAVA(OOP)?

    As mentioned above the this operator is used to refer to the current object. Another use is when you need to call a method in another class that has a parameter of the current class.
    class Bar {
        public void doStuff(Foo f) {
     
        }
    }
     
    class Foo {
        private Bar b = new Bar();
     
        public void someMethod() {
            b.doStuff(this);
        }
    }
    Improving the world one idiot at a time!

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