how to import java.util

To import the java.util package in Java, you will need to include the following import statement at the beginning of your code:

import java.util.*;

The java.util package is a standard Java package that contains a collection of utility classes, including collections (e.g., lists, sets, maps), dates and times, random numbers, and miscellaneous utility classes (e.g., observer and event classes).

Here is an example of how you might use some classes from the java.util package in your code:

import java.util.*;

public class UtilExample {
  public static void main(String[] args) {
    // Create a random number generator
    Random random = new Random();

    // Generate a random integer
    int randomInt = random.nextInt();
    System.out.println("Random integer: " + randomInt);

    // Create a list
    List<String> list = new ArrayList<>();
    list.add("item1");
    list.add("item2");
    list.add("item3");

    // Iterate over the list
    for (String item : list) {
      System.out.println(item);
    }

    // Create a map
    Map<String, Integer> map = new HashMap<>();
    map.put("key1", 1);
    map.put("key2", 2);
    map.put("key3", 3);

    // Get a value from the map
    int value = map.get("key2");
    System.out.println("Value for key2: " + value);
  }
}

This code uses the Random class from java.util to generate a random integer, the ArrayList and for-each loop constructs from java.util to iterate over a list, and the HashMap class from java.util to create and retrieve values from a map.