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solves #2553: Separate the Digits in an Array in java

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Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -798,7 +798,7 @@`
`798`	`798`	`\| 2540 \| [Minimum Common Value](https://leetcode.com/problems/minimum-common-value) \| [![Java](assets/java.png)](src/MinimumCommonValue.java) \| \|`
`799`	`799`	`\| 2544 \| [Alternating Digit Sum](https://leetcode.com/problems/alternating-digit-sum) \| [![Java](assets/java.png)](src/AlternatingDigitSum.java) \| \|`
`800`	`800`	`\| 2549 \| [Count Distinct Numbers on Board](https://leetcode.com/problems/count-distinct-numbers-on-board) \| [![Java](assets/java.png)](src/CountDistinctNumbersOnBoard.java) \| \|`
`801`		`-\| 2553 \| [Separate the Digits in an Array](https://leetcode.com/problems/separate-the-digits-in-an-array) \| \| \|`
	`801`	`+\| 2553 \| [Separate the Digits in an Array](https://leetcode.com/problems/separate-the-digits-in-an-array) \| [![Java](assets/java.png)](src/SeparateTheDigitsInAnArray.java) \| \|`
`802`	`802`	`\| 2558 \| [Take Gifts From the Richest Pile](https://leetcode.com/problems/take-gifts-from-the-richest-pile) \| \| \|`
`803`	`803`	`\| 2562 \| [Find the Array Concatenation Value](https://leetcode.com/problems/find-the-array-concatenation-value) \| \| \|`
`804`	`804`	`\| 2566 \| [Maximum Difference by Remapping a Digit](https://leetcode.com/problems/maximum-difference-by-remapping-a-digit) \| \| \|`

Lines changed: 31 additions & 0 deletions

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	`1`	`+// https://leetcode.com/problems/separate-the-digits-in-an-array`
	`2`	`+// T: O(N)`
	`3`	`+// S: O(N)`
	`4`	`+`
	`5`	`+import java.util.ArrayList;`
	`6`	`+import java.util.List;`
	`7`	`+`
	`8`	`+public class SeparateTheDigitsInAnArray {`
	`9`	`+ public int[] separateDigits(int[] nums) {`
	`10`	`+ final List<Integer> digits = new ArrayList<>();`
	`11`	`+ for (int number : nums) {`
	`12`	`+ addDigitsToList(digits, number);`
	`13`	`+ }`
	`14`	`+ return toArray(digits);`
	`15`	`+ }`
	`16`	`+`
	`17`	`+ private int[] toArray(List<Integer> list) {`
	`18`	`+ final int[] array = new int[list.size()];`
	`19`	`+ for (int index = 0 ; index < list.size() ; index++) {`
	`20`	`+ array[index] = list.get(index);`
	`21`	`+ }`
	`22`	`+ return array;`
	`23`	`+ }`
	`24`	`+`
	`25`	`+ private void addDigitsToList(List<Integer> digits, int number) {`
	`26`	`+ final String num = number + "";`
	`27`	`+ for (int index = 0 ; index < num.length() ; index++) {`
	`28`	`+ digits.add(num.charAt(index) - '0');`
	`29`	`+ }`
	`30`	`+ }`
	`31`	`+}`

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