How to convert this C++ code to java

// C++ Program to find the size of 
// largest subset of anagram 
#include <bits/stdc++.h> 
using namespace std; 

// Utility function to find size of 
// largest subset of anagram 
int largestAnagramSet(string arr[], int n) 
{ 
	int maxSize = 0; 

	// Initialize map<> of vector array 
	map<vector<int>, int> count; 

	for (int i = 0; i < n; ++i) { 

		// Vector array to store 
		// frequency of element 
		vector<int> freq(26); 

		for (char ch : arr[i]) 
			freq[ch - 'a'] += 1; 

		// Increment the count of 
		// frequency array in map<> 
		count[freq] += 1; 

		// Compute the maximum size 
		maxSize = max(maxSize, count[freq]); 
	} 
	return maxSize; 
} 

// Driver code 
int main() 
{ 
	string arr[] = { "ant", "magenta", "magnate", 
							"tan", "gnamate" }; 
	int n = sizeof(arr) / sizeof(arr[0]); 
	cout << largestAnagramSet(arr, n) << "\n"; 

	string arr1[] = { "cars", "bikes", "arcs", 
									"steer" }; 
	n = sizeof(arr1) / sizeof(arr[0]); 
	cout << largestAnagramSet(arr1, n); 
	return 0; 
} 

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package hw1;

import java.util.ArrayList;
import java.util.Arrays;

/**
 *
 * @author rafeaaalbloushi
 */
public class anagram {
    public int largestAnagramSet(String arr[], int n) 
{ 

	int maxSize = 0; 
	ArrayList<String, int>=new ArrayList; 

	for (int i = 0; i < n; ++i) { 

		// sort the string 
		Arrays.sort(a, maxSize, i);

		// Increment the count of string 
		count[arr[i]] += 1; 

		// Compute the maximum size of string 
		maxSize = max(maxSize, count[arr[i]]); 
	} 

	return maxSize; 
} 
}