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Update 1356.根据数字二进制下1的数目排序.md

增加Java实现

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`@@ -123,6 +123,32 @@ public:`
`123`	`123`	`## Java`
`124`	`124`
`125`	`125`	```java
	`126`	`+class Solution {`
	`127`	`+ private int cntInt(int val){`
	`128`	`+ int count = 0;`
	`129`	`+ while(val > 0) {`
	`130`	`+ val = val & (val - 1);`
	`131`	`+ count ++;`
	`132`	`+ }`
	`133`	`+`
	`134`	`+ return count;`
	`135`	`+ }`
	`136`	`+`
	`137`	`+ public int[] sortByBits(int[] arr) {`
	`138`	`+ return Arrays.stream(arr).boxed()`
	`139`	`+ .sorted(new Comparator<Integer>(){`
	`140`	`+ @Override`
	`141`	`+ public int compare(Integer o1, Integer o2) {`
	`142`	`+ // TODO Auto-generated method stub`
	`143`	`+ int cnt1 = cntInt(o1);`
	`144`	`+ int cnt2 = cntInt(o2);`
	`145`	`+ return (cnt1 == cnt2) ? Integer.compare(o1, o2) : Integer.compare(cnt1, cnt2);`
	`146`	`+ }`
	`147`	`+ })`
	`148`	`+ .mapToInt(Integer::intValue)`
	`149`	`+ .toArray();`
	`150`	`+ }`
	`151`	`+}`
`126`	`152`	```
`127`	`153`
`128`	`154`

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