Find the largest number in array java

import java.util.Scanner;
class LargestNumberInArray{
	public static void main(String[] args) {
		int max,i,n;
		int a[];
		Scanner sc = new Scanner(System.in);
		System.out.print("Enter Size : ");
		n = sc.nextInt();
		a=new int[n];
		System.out.println("Enter the numbers");
		for (i=0; i<n; i++ ) {
			a[i] = sc.nextInt();
		}
		max = max_num(a,n);
		System.out.println("The largest number is "+max);
	}
	static int max_num(int[]a, int n){
		int i;
		int m = 0;
		for(i=0;i<n;i++){
			if (a[i]>m) {
				m=a[i];
			}
		}
		return m;
	}
}