php: Array: max, min: get maximum and minimum value of array

‘max’ and ‘min’ functions takes an array as argument and return maximum and minimum values of array.

 

Syntax

max($array_name);

min($array_name);

 

Example

$max_element = max($arr1);

$min_element = min($arr1);

 

array_max_min_demo.php

#!/usr/bin/php

<?php

    $arr1 = array(22, 31, -5, 77, -98, 18);
    
    $max_element = max($arr1);
    $min_element = min($arr1);

    print_r($arr1);
    echo "\nMaximum Element : $max_element\n";
    echo "\nMinimum Element : $min_element\n";
?>

 

Output

$./array_max_min_demo.php 

Array
(
    [0] => 22
    [1] => 31
    [2] => -5
    [3] => 77
    [4] => -98
    [5] => 18
)

Maximum Element : 77

Minimum Element : -98

 

 

 

 

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Bean Validation: @Min: Value must be greater than or equal to this number

You can apply @Min annotation on a number whose value must be greater than or equal to the specified maximum.

 

Example

@Min(18)

private int age;

 

Supported Types

a.   BigDecimal

b.   BigInteger

c.    byte

d.   short

e.   int

f.     long

 

Where can I apply this annotation?

a.   METHOD

b.   FIELD

c.    ANNOTATION_TYPE

d.   CONSTRUCTOR

e.   PARAMETER

f.     TYPE_USE

 

Employee.java

package com.sample.app.model;

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;

public class Employee {

	private int id;

	private String name;

	@Max(58)
	@Min(18)
	private int age;

	public Employee(int id, String name, int age) {
		this.id = id;
		this.name = name;
		this.age = age;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

}

Test.java

package com.sample.app;

import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;

import com.sample.app.model.Employee;

public class Test {
	private static ValidatorFactory validatorFactory = Validation.buildDefaultValidatorFactory();
	private static Validator validator = validatorFactory.getValidator();

	private static void validateBean(Employee emp) {
		System.out.println("************************************");
		Set<ConstraintViolation<Employee>> validationErrors = validator.validate(emp);

		if (validationErrors.size() == 0) {
			System.out.println("No validation errors....");
		}

		for (ConstraintViolation<Employee> violation : validationErrors) {
			System.out.println(violation.getPropertyPath() + "," + violation.getMessage());
		}
		System.out.println("");
	}

	public static void main(String args[]) {

		Employee emp1 = new Employee(1, "Krishna", 28);
		System.out.println("Validation errors on bean emp1");
		validateBean(emp1);

		Employee emp2 = new Employee(2, "Siva", 59);
		System.out.println("Validation errors on bean emp2");
		validateBean(emp2);
		
		Employee emp3 = new Employee(3, "Sailaja", 9);
		System.out.println("Validation errors on bean emp3");
		validateBean(emp3);
	}
}

Output

Validation errors on bean emp1
************************************
No validation errors....

Validation errors on bean emp2
************************************
age,must be less than or equal to 58

Validation errors on bean emp3
************************************
age,must be greater than or equal to 18

 

  

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TableSaw: min: Find minimum value in a column

‘min’ function return the minimum value from a column.

App.java

package com.sample.app;

import tech.tablesaw.api.IntColumn;

public class App {

 public static void main(String args[]) {
  int[] numbers = { 23, 45, 6, 32, 1, 43 };
  
  IntColumn numbersColumn = IntColumn.create("My Numbers", numbers);
  double minimumValue = numbersColumn.min();
  

  System.out.println("minimumValue : " + minimumValue);
 }
}

Output

minimumValue : 1.0

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