How to sort ArrayList in java, Sorting java Collections

Let us see how to sort values in java collections, List/ArrayList.  We can achieve this by using Collections class, Collections class contains a method sort(Collection Object), just give your collection object to the sort() method that’s it, consider this example….

SortCollection.java

package java4s;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class SortCollection {

	public static void main(String... args)
	{

		    List li = new ArrayList();

		    li.add("India");
		    li.add("United States");
		    li.add("Malaysia");
		    li.add("Australia");
		    li.add("Lundon");

		    Collections.sort(li);

			for(String temp: li)
			{
				System.out.println("Countries : "+temp);
			}
	}
}

Output

Countries : Australia
Countries : India
Countries : Lundon
Countries : Malaysia
Countries : United States

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::. About the Author .::
		Sivateja Kandula - Java/J2EE Full Stack Developer Founder of Java4s - Get It Yourself, A popular Java/J2EE Programming Blog, Love Java and UI frameworks. You can sign-up for the Email Newsletter for your daily dose of Java tutorials.