Find Minimum Maximum value in ArrayList
Find Minimum Maximum value in ArrayList Java example shows how to find the minimum and maximum value in ArrayList. The example also shows how to find minimum maximum value along with index in Java ArrayList.
How to find the Minimum Maximum value in ArrayList?
There are a couple of ways to find minimum and maximum value in Java ArrayList.
1) Find Min Max value in ArrayList using Collections class
You can use min and max methods of Collections class.
This method returns the minimum element/value of the specified collection according to the natural ordering of the elements.
This method returns the maximum element/value of the specified collection according to the natural ordering of the elements.
How to find an index of minimum maximum elements in Java ArrayList?
If you want to find index of minimum or maximum element instead of value, you can use indexOf method of the ArrayList class.
This method returns the index of the specified element. If the element is not found in the ArrayList, it returns -1.
2) Find Min Max value in ArrayList using for loop
If you want to find min max values without using the Collections class, you can use for loop to find the same as given below.
Please let me know your views in the comments section below.
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2 comments
What if there are duplicate entries in the ArrayList.. like 5 times number 1 ? This code will find only the first occurrence of number 1 and will say that’s the minimum as its the only one.. How to find all the minimum indexes.
Hello Simon, Even if the ArrayList has duplicates, the minimum value above code finds remains the same. So if ArrayList has 5 times 1, the minimum value is still 1 regardless of the index and that was the purpose of the above code, to find the minimum value. However, if you want to find index of all the minimum elements, that can be easily done by changing the code a little bit. Once you get the minimum element, scan through the ArrayList and check what all indexes has the element. I hope this answers your question. Thanks.
Find Max and Min Values of a List in Java
There are many ways to find the max and min values of a List in Java. We will explore the following:
Finding the maximum and minimum values of a List using the max() and min() methods from the Collections class
To return the maximum element of the given collection, we can use the max() method, and to return the minimum value, we can use the min() method of the Collections class from the java.util package.
public class Test < public static void main(String[] args) < Listlist = new ArrayList<>(Arrays.asList(7, 19, 14, 1, 12, 22, 18, 3, 28, 5)); System.out.println("Maximum value: " + Collections.max(list)); System.out.println("Minimum value: " + Collections.min(list)); > > Finding the maximum and minimum values in List using the Java 8 Streams
We can use the min() and max() Stream operations that accept the Comparator to return the largest and smallest numbers from the list.
public class Test < public static void main(String[] args) < Listlist = new ArrayList<>(Arrays.asList(7, 19, 14, 1, 12, 22, 18, 3, 28, 5)); System.out.println("Maximum value: " + list.stream().max(Integer::compare).get()); System.out.println("Minimum value: " + list.stream().min(Integer::compare).get()); > > Here, we called the get() method because both max() and min() methods return the Optional.
Finding the Largest and Smallest Numbers in List Using Iteration
We can find the max and min values using the for loop like in the following example:
public class Test < public static void main(String[] args) < Listlist = new ArrayList<>(Arrays.asList(7, 19, 14, 1, 12, 22, 18, 3, 28, 5)); System.out.println("Maximum value: " + getMax(list)); System.out.println("Minimum value: " + getMin(list)); > private static int getMax(List numbers) < int maximum = -1; for (Integer number : numbers) < if (number >maximum) < maximum = number; >> return maximum; > private static int getMin(List numbers) < int minimum = Integer.MAX_VALUE; for (Integer number : numbers) < if (number < minimum) < minimum = number; >> return minimum; > > Related Posts:
Find Max and Min Values of a List in Java
There are many ways to find the max and min values of a List in Java. We will explore the following:
Finding the maximum and minimum values of a List using the max() and min() methods from the Collections class
To return the maximum element of the given collection, we can use the max() method, and to return the minimum value, we can use the min() method of the Collections class from the java.util package.
public class Test < public static void main(String[] args) < Listlist = new ArrayList<>(Arrays.asList(7, 19, 14, 1, 12, 22, 18, 3, 28, 5)); System.out.println("Maximum value: " + Collections.max(list)); System.out.println("Minimum value: " + Collections.min(list)); > > Finding the maximum and minimum values in List using the Java 8 Streams
We can use the min() and max() Stream operations that accept the Comparator to return the largest and smallest numbers from the list.
public class Test < public static void main(String[] args) < Listlist = new ArrayList<>(Arrays.asList(7, 19, 14, 1, 12, 22, 18, 3, 28, 5)); System.out.println("Maximum value: " + list.stream().max(Integer::compare).get()); System.out.println("Minimum value: " + list.stream().min(Integer::compare).get()); > > Here, we called the get() method because both max() and min() methods return the Optional.
Finding the Largest and Smallest Numbers in List Using Iteration
We can find the max and min values using the for loop like in the following example:
public class Test < public static void main(String[] args) < Listlist = new ArrayList<>(Arrays.asList(7, 19, 14, 1, 12, 22, 18, 3, 28, 5)); System.out.println("Maximum value: " + getMax(list)); System.out.println("Minimum value: " + getMin(list)); > private static int getMax(List numbers) < int maximum = -1; for (Integer number : numbers) < if (number >maximum) < maximum = number; >> return maximum; > private static int getMin(List numbers) < int minimum = Integer.MAX_VALUE; for (Integer number : numbers) < if (number < minimum) < minimum = number; >> return minimum; > > Related Posts:
How to Find Max & Min from a List using Java 8 Streams
Deepak Verma is a Test Automation Consultant and Software development Engineer for more than 10 years. His mission is to help you become an In-demand full stack automation tester. He is also the founder of Techndeck, a blog and online coaching platform dedicated to helping you succeed with all the automation basics to advanced testing automation tricks. View all posts
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