Commit 3260d2f

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add comparator use cases

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+13

-1

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+13

-1

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Lines changed: 13 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -13,15 +13,27 @@ public int getAge(){`
`13`	`13`	`}`
`14`	`14`	`}`
`15`	`15`
	`16`	`+class DevComparator implements Comparator<Developer> {`
	`17`	`+ @Override`
	`18`	`+ public int compare(Developer firstValue, Developer secondValue){`
	`19`	`+ return Integer.compare(firstValue.getAge(), secondValue.getAge());`
	`20`	`+ }`
	`21`	`+}`
	`22`	`+`
`16`	`23`	`public class ComparatorSnippet{`
`17`	`24`
`18`	`25`	`public static void main(String... args)throws Exception{`
`19`		`-`
	`26`	`+ // way - 1`
	`27`	`+ // better if sorting criteria keeps changing`
`20`	`28`	`Developer[] devs = Collections.sort(listDevs, new Comparator<Developer>() {`
`21`	`29`	`@Override`
`22`	`30`	`public int compare(Developer o1, Developer o2) {`
`23`	`31`	`return o1.getAge() - o2.getAge();`
`24`	`32`	`}`
`25`	`33`	`});`
	`34`	`+ // way - 2`
	`35`	`+ devs = Collections.sort(listDevs, (Developer a , Developer b) -> Integer.compare(a.getAge(), b.getAge()));`
	`36`	`+ // way - 3`
	`37`	`+ devs = Collections.sort(listDevs, new DevComparator());`
`26`	`38`	`}`
`27`	`39`	`}`

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