how to get a integer from instream.max code example

Example: java 8 find min value in array

package com.concerned.crossbill;

import java.util.Arrays;

public class Foo {

  public int getMin(int[] numbers) {
	return Arrays.stream(numbers).min().getAsInt();
  }
}
// test class
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import com.concerned.crossbill.Foo;

public class FooTest { 
  public void testGetMin() {
    int[] numbers =  new int[]{12, 10, 31, 30, 23, 4, 5, 5, 5, 5, 10, 40};
    
    Foo foo = new Foo();
    int result  = foo.getMin(numbers);
    int expResult  = 4;
    
    assertEquals(expResult, result);
  }
}