Sport is a parent object whereas Cricket and Football are the child object. Now, let's see how we are going to understand it in terms of upcasting. Sport, in common, is a parent object and each of its different forms is its child object and they have an IS-A relationship.
So, it's correct to say that Cricket is-a sport or Football is-a sport (IS-A relationship). It's a personal choice to be interested in one sport or the other, be it cricket, football, hockey, etc.
The reason is that the child object created here can show the properties of its parent, therefore it's correct to put the reference of its parent. Notice in this image that the reference variable is of the type Parent whereas the object is created of the type Child. Upcasting, in simpler words, is the typecasting of a child object to a parent object. Let's understand the meaning and differences related to upcasting and downcasting in Java. The purpose of typecasting is to enable a function in a program to process the variables correctly. Here, we're going to see how the conversion of an object takes place (because we have usually seen the typecasting in the case of datatypes only).īasically, we'll be typecasting an object to a data type and there would be a parent and child object for it. Typecasting is one of the important concepts in Java where the conversion of data types can be used for various purposes. Upcasting and downcasting in Java are the two forms of typecasting where conversion of data type takes place. Downcasting (or narrowing) is typecasting from a superclass to a subclass so that we can access the methods of the subclass, i.e., the child class. In this way, we can access the properties (methods and variables) of the superclass, i.e., the Parent as well. Upcasting (or widening) is the typecasting from a subclass to a superclass ( Child to Parent class). This article was written by Chris Robinson of Scots Language Dictionaries.What is Upcasting and Downcasting in Java? To return to disjaskit, I hope readers will let me know if, like the writer in Tait’s Edinburgh Magazine (1835), “I’ve got intil a bad habit o’ writing lang disjasket sort o’ sentences.” Where straightforward tiredness is involved, the related word forjaskjit is more common, as in Walter Elliot’s Clash-ma-clavers: “An, fair forjaskit, he lay doun Tae tak a roadside nap”. One example, however, from the New Shetlander (1947) does clearly evoke the backbreaking exhaustion of harvest labour: “Dedzjaskit, a hairst time, wi’ kruklin ta shaer”. Some quotations used in the Dictionary of the Scots Language to illustrate the sense of weary are slightly ambiguous and are not completely severed from the other senses of untidy or dejected. A strange, sad example is found in George Macdonald’s Alec Forbes of Howglen (1865): “The buiks are beginnin’ to ken by this time what they’re aboot for sic a throuither disjaskit midden o’ lere, I never saw”. Poor highway maintenance is nothing new, apparently. In Scott’s Old Mortality (1816) we read: “Tak the first broken disjasked-looking road that makes for the hills”. Crockett’s The Grey Man (1896): “Keep your ill tongue for that disjaskit, ill-put-thegither rachle o’ banes that ye hae for guidman”. The character created by James Smith in Jenny Blair’s Maunderings (1872) might have been quite joco for all we know: “An auld yellow cotton rag that he dignifies wi’ the name o’ a Sunday shirt! – the disjasket-lookin’ crater!” Another dishevelled individual appears in this eloquent put-down from S. Disjaskit can also mean neglected, untidy or dilapidated. This heartfelt example of our word in action comes from Violet Jacob’s More Songs of Angus (1918): “I’m fairly disjaskit, Christina, The warld an’ its glories are toom”. If you are dejected and weary after the bitter winter, here is the word for you.
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