Commitf3b3898

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Update 217-Contains-Duplicate.java

Use the return value of `add` function in `Set` instead of using `contains` and `add` function separately.

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Lines changed: 6 additions & 6 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,11 +1,11 @@`
`1`	`1`	`classSolution {`
`2`	`2`	`publicbooleancontainsDuplicate(int[]nums) {`
`3`		`-Set<Integer>numbers =newHashSet<Integer>();`
`4`		`-for (intnum :nums) {`
`5`		`-if (numbers.contains(num))returntrue;`
`6`		`-numbers.add(num);`
	`3`	`+Set<Integer>uniques =newHashSet<>();`
	`4`	`+for (finalintnum :nums) {`
	`5`	`+if (!uniques.add(num)) {`
	`6`	`+returntrue;`
	`7`	`+ }`
`7`	`8`	`}`
`8`		`-`
`9`	`9`	`returnfalse;`
`10`	`10`	`}`
`11`		`-}`
	`11`	`+}`

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