find minimum number in array java

1// Find minimum and maximum values in a java array
2public class MaxMinValueInArray
3{
4   public static void main(String[] args) 
5   {
6      int[] arrNumber = new int[]{50, 150, 250, 500, 160, 530};
7      int maximum = maxNumber(arrNumber);
8      System.out.println("Maximum value : " + maximum);
9      // calling min function java
10      int minimum = minNumber(arrNumber);
11      System.out.println("Minimum value : " + minimum);
12   }
13   // java find max in array
14   public static int maxNumber(int[] arr)
15   {
16      int maximumValue = arr[0];
17      for(int a = 1; a < arr.length; a++)
18      {
19         if(arr[a] > maximumValue)
20         {
21            maximumValue = arr[a];
22         }
23      }
24      return maximumValue;
25   }
26   // java min of array
27   public static int minNumber(int[] arr)
28   {
29      int minimumValue = arr[0];
30      // find minimum value in array java
31      for(int a = 1; a < arr.length; a++)
32      {
33         if(arr[a] < minimumValue)
34         {
35            minimumValue = arr[a];
36         }
37      }
38      return minimumValue;
39   }
40}

1private static int findMin(int[] array) {
2		int min = array[0];
3		for(int i=1;i<array.length;i++) {
4			if(min > array[i]) {
5				min = array[i];
6			}
7		}
8		return min;
9	}

1public class MinimumNumber{
2  public static void main(String[] args){
3    int[] arr=new int[]{2,3,4,1};
4    int min=arr[0];
5    for(int i=0;i<arr.length;i++){
6      if(arr[i]<min){
7        min=arr[i];
8      }
9    }
10    System.out.println("Minimum Number in array:"+min);
11  }
12}

1Integer[] num = { 2, 4, 7, 5, 9 };
2        // using Collections.min() to find minimum element
3        // using only 1 line.
4        int min1 = Collections.min(Arrays.asList(num));
5
6        // using Collections.max() to find maximum element
7        // using only 1 line.
8        int max1 = Collections.max(Arrays.asList(num));
9        System.out.println(min1); // 2 
10        System.out.println(max1); // 9