Add Java solution to 179. Largest Number

java/0179-largest-number.java

@@ -0,0 +1,26 @@
+class Solution {
+ public String largestNumber(int[] nums) {
+ String[] arr = new String[nums.length];
+
+ for(int i=0; i<nums.length; i++) {
+ arr[i] = String.valueOf(nums[i]);
+ }
+
+ Arrays.sort(arr, new Comparator<String>() {
+ @Override
+ public int compare(String s1, String s2) {
+ String n1 = s1 + s2, n2 = s2 + s1;
+ return n2.compareTo(n1);
+ }
+ });
+
+ if(arr[0].equals("0")) return "0";
+
+ StringBuilder sb = new StringBuilder();
+ for(String s : arr) {
+ sb.append(s);
+ }
+
+ return sb.toString();
+ }
+}