find min in array java

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 static double arrayMax(double[] arr) {
2    double max = Double.NEGATIVE_INFINITY;
3
4    for(double cur: arr)
5        max = Math.max(max, cur);
6
7    return max;
8}

1package com.concerned.crossbill;
2
3import java.util.Arrays;
4
5public class Foo {
6
7  public int getMin(int[] numbers) {
8	return Arrays.stream(numbers).min().getAsInt();
9  }
10}
11// test class
12import org.junit.Test;
13import static org.junit.Assert.assertEquals;
14import com.concerned.crossbill.Foo;
15
16public class FooTest { 
17  public void testGetMin() {
18    int[] numbers =  new int[]{12, 10, 31, 30, 23, 4, 5, 5, 5, 5, 10, 40};
19    
20    Foo foo = new Foo();
21    int result  = foo.getMin(numbers);
22    int expResult  = 4;
23    
24    assertEquals(expResult, result);
25  }
26}

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

1import java.util.Random;
2
3public class Main {
4
5public static void main(String[] args) {
6   int a[] = new int [100];
7   Random rnd = new Random ();
8
9    for (int i = 0; i< a.length; i++) {
10        a[i] = rnd.nextInt(99-0)+0;
11        System.out.println(a[i]);
12    }
13
14    int max = 0;          
15
16    for (int i = 0; i < a.length; i++) {
17        a[i] = max;
18
19
20        for (int j = i+1; j<a.length; j++) {
21            if (a[j] > max) {
22               max = a[j];
23            }
24
25        }
26    }
27
28    System.out.println("Max element: " + max);
29}
30}

1 Scanner input = new Scanner(System.in);
2        // Minimum And Maximum 
3        int count = 0;
4        int min = 0;
5        int max = 0;
6        boolean bugSolved = true;
7		/* or we can use :
8        int min = Integer.MAX_VALUE;
9        int max = Integer.MIN_VALUE;
10        */
11		
12        while (true){
13            int cnt = count++;
14            System.out.print("Enter Number #"+(cnt+1)+": ");
15            boolean isValid = input.hasNextInt();
16            if(isValid){
17               int num = input.nextInt();
18               /* if (bugSolved){
19                   bugSolved = false;
20                   min = num;
21                   max = num;
22               }  # Just remove this condition and 
23               	boolean (bugSolved) at the top, if you use 
24               	int min = Integer.MAX_VALUE and int max = 
25                Integer.MIN_VALUE */
26                if (num < min) {
27                    min = num;
28                }else if (num > max){
29                    max = num;
30                }
31            }else{
32                System.out.println("Invalid input..");
33                break;
34            }
35            input.nextLine();
36        }
37        System.out.println("Min Number : " + min);
38        System.out.println("Max Number : " + max);