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Add Solution.java for 0557.Reverse Words in a String III

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	`1`	`+# Reverse Words in a String III`
	`2`	`+`
	`3`	`+Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.`
	`4`	`+`
	`5`	`+## Example 1:`
	`6`	+```
	`7`	`+ Input: "Let's take LeetCode contest"`
	`8`	`+ Output: "s'teL ekat edoCteeL tsetnoc"`
	`9`	+```

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	`1`	`+class Solution {`
	`2`	`+ public String reverseWords(String s) {`
	`3`	`+ String flag = " ";`
	`4`	`+ StringBuilder result = new StringBuilder();`
	`5`	`+ for (String temp : s.split(flag)) {`
	`6`	`+ for (int i = temp.length() - 1; i >= 0; i--) {`
	`7`	`+ result.append(temp.charAt(i));`
	`8`	`+ }`
	`9`	`+ result.append(flag);`
	`10`	`+ }`
	`11`	`+ return result.toString().substring(0, s.length());`
	`12`	`+ }`
	`13`	`+}`

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