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0332.重新安排行程添加Java代码

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`@@ -261,6 +261,43 @@ for (pair<string, int>target : targets[result[result.size() - 1]])`
`261`	`261`	`## 其他语言版本`
`262`	`262`
`263`	`263`	`### java`
	`264`	`+`
	`265`	+```java
	`266`	`+class Solution {`
	`267`	`+ private LinkedList<String> res;`
	`268`	`+ private LinkedList<String> path = new LinkedList<>();`
	`269`	`+`
	`270`	`+ public List<String> findItinerary(List<List<String>> tickets) {`
	`271`	`+ Collections.sort(tickets, (a, b) -> a.get(1).compareTo(b.get(1)));`
	`272`	`+ path.add("JFK");`
	`273`	`+ boolean[] used = new boolean[tickets.size()];`
	`274`	`+ backTracking((ArrayList) tickets, used);`
	`275`	`+ return res;`
	`276`	`+ }`
	`277`	`+`
	`278`	`+ public boolean backTracking(ArrayList<List<String>> tickets, boolean[] used) {`
	`279`	`+ if (path.size() == tickets.size() + 1) {`
	`280`	`+ res = new LinkedList(path);`
	`281`	`+ return true;`
	`282`	`+ }`
	`283`	`+`
	`284`	`+ for (int i = 0; i < tickets.size(); i++) {`
	`285`	`+ if (!used[i] && tickets.get(i).get(0).equals(path.getLast())) {`
	`286`	`+ path.add(tickets.get(i).get(1));`
	`287`	`+ used[i] = true;`
	`288`	`+`
	`289`	`+ if (backTracking(tickets, used)) {`
	`290`	`+ return true;`
	`291`	`+ }`
	`292`	`+`
	`293`	`+ used[i] = false;`
	`294`	`+ path.removeLast();`
	`295`	`+ }`
	`296`	`+ }`
	`297`	`+ return false;`
	`298`	`+ }`
	`299`	`+}`
	`300`	+```
`264`	`301`
`265`	`302`	```java
`266`	`303`	`class Solution {`

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